- Constitutive expression of the CIRCADIAN CLOCK ASSOCIATED 1 (CCA1) gene disrupts circadian rhythms and suppresses its own expression
Z Y Wang
Department of Molecular, Cell, and Developmental Biology, UCLA, Los Angeles, California 90095 1606, USA
Cell 93:1207-17. 1998
..Furthermore, the expression of both endogenous CCA1 and the related LHY gene was suppressed. Our results suggest that CCA1 is a part of a feedback loop that is closely associated with the circadian clock in Arabidopsis...
- Rhythmic growth explained by coincidence between internal and external cues
Section of Plant Biology, College of Biological Sciences, University of California, Davis, One Shields Avenue, Davis, California 95616, USA
Nature 448:358-61. 2007
..This interaction may serve as a paradigm for understanding how endogenous and environmental signals cooperate to control other processes...
- Gibberellins modulate light signaling pathways to prevent Arabidopsis seedling de-etiolation in darkness
Instituto de Biología Molecular y Celular de Plantas CSIC UPV, Av De Los Naranjos s n, 46022 Valencia, Spain
Plant J 53:324-35. 2008
..Seedlings deficient in gibberellin (GA) synthesis or signaling display a de-etiolated phenotype when grown in darkness, equivalent to the phenotype of cop1 mutants, which indicates that the switch between photo- and ..
- Light deprivation damages monoamine neurons and produces a depressive behavioral phenotype in rats
M M C Gonzalez
Department of Psychiatry, School of Medicine, University of Pennsylvania, Philadelphia, PA 19104 6100, USA
Proc Natl Acad Sci U S A 105:4898-903. 2008
..We recently showed that rats kept for 6 weeks in constant darkness (DD) have anatomical and behavioral features similar to depressed patients, including dysregulation of circadian ..
- Dark rearing alters the development of GABAergic transmission in visual cortex
Mind Brain Institute, Johns Hopkins University, Baltimore, Maryland 21218, USA
J Neurosci 22:8084-90. 2002
..Thus, sensory experience appears to play a permissive role in the maturation of intracortical GABAergic circuits...
- Circadian rhythms confer a higher level of fitness to Arabidopsis plants
Rachel M Green
Department of Molecular, Cell and Developmental Biology, P.O. Box 160606, University of California-Los Angeles, Los Angeles, CA 90095-1606, USA
Plant Physiol 129:576-84. 2002
..In addition, we demonstrate that two other circadian rhythm mutants, LHY-ox and elf3, have low-viability phenotypes. Our findings demonstrate the adaptive advantage of circadian rhythms in Arabidopsis...
- Arabidopsis nitric oxide synthase1 is targeted to mitochondria and protects against oxidative damage and dark-induced senescence
Fang Qing Guo
Section of Cell and Developmental Biology, Division of Biological Sciences, University of California at San Diego, La Jolla, 92093 0116, USA
Plant Cell 17:3436-50. 2005
..These results demonstrate that NOS1 is a mitochondrial NOS that reduces ROS levels, mitigates oxidative damage, and acts as an antisenescence agent...
- The genetic basis of singlet oxygen-induced stress responses of Arabidopsis thaliana
Institute of Plant Sciences, Plant Genetics, Swiss Federal Institute of Technology ETH, CH 8092 Zurich, Switzerland
Science 306:1183-5. 2004
..Instead, seedling lethality and growth inhibition of mature plants result from genetic programs that are activated after the release of singlet oxygen has been perceived by the plant...
- A transcription factor response element for gene expression during circadian night
Hiroki R Ueda
Molecular Medicine Laboratories, Institute for Drug Discovery Research, Yamanouchi Pharmaceutical Company, Ltd, 21 Miyukigaoka, Tsukuba, Ibaraki 305 8585, Japan
Nature 418:534-9. 2002
..We profiled suprachiasmatic nuclei and liver genome-wide expression patterns under light/dark cycles and constant darkness. We determined transcription start sites of human orthologues for newly identified cycling genes and then ..
- Circadian adaptation to night-shift work by judicious light and darkness exposure
Diane B Boivin
Centre for Study and Treatment of Circadian Rhythms, Douglas Hospital Research Centre, Department of Psychiatry, McGill University, Montreal, Quebec H4H 1R3, Canada
J Biol Rhythms 17:556-67. 2002
..On work days, participants maintained regular sleep/wake schedules including a single 8-h sleep/darkness episode beginning 2 h after the end of the night shift...
- Biological clock in total darkness: the Clock/MOP3 circadian system of the blind subterranean mole rat
Institute of Evolution, University of Haifa, Mount Carmel, Haifa 31905, Israel
Proc Natl Acad Sci U S A 98:13751-6. 2001
..Understanding Clock/MOP3 function could highlight circadian mechanisms in blind mammals and their unique pattern as a result of adapting to life underground...
- Rods-cones and melanopsin detect light and dark to modulate sleep independent of image formation
C M Altimus
Department of Biology, Johns Hopkins University, Baltimore, MD 21218, USA
Proc Natl Acad Sci U S A 105:19998-20003. 2008
..Thus, in addition to their known role in aligning circadian physiology with day and night, ipRGCs also relay light and dark information from both rod-cone and melanopsin-based pathways to modulate sleep and wakefulness...
- The basic helix-loop-helix transcription factor PIF5 acts on ethylene biosynthesis and phytochrome signaling by distinct mechanisms
Department of Plant and Microbial Biology, University of California, Berkeley, California 94720, USA
Plant Cell 19:3915-29. 2007
..data thus indicate that overexpressed PIF5 causes altered ethylene levels, which promote the triple response in darkness, whereas in the light, the interaction of photoactivated phyB with PIF5 causes degradation of the photoreceptor ..
- Transient release of oxygenated volatile organic compounds during light-dark transitions in Grey poplar leaves
, , A-6020 Innsbruck, Austria
Plant Physiol 135:1967-75. 2004
- Visual deprivation decreases somatic GAD65 puncta number on layer 2/3 pyramidal neurons in mouse visual cortex
Department of Biology, University of Maryland, College Park, 20742, USA
Neural Plast 2009:415135. 2009
..There was no change in GAD65-puncta volume or intensity. These results support the reorganization of inhibitory circuitry within layer 2/3 of visual cortex in response to changes in visual experience...
- Persistence of experience-induced homeostatic synaptic plasticity through adulthood in superficial layers of mouse visual cortex
Department of Biology, College of Chemical and Life Sciences, University of Maryland, College Park, Maryland 20742, USA
J Neurosci 27:6692-700. 2007
..Our results demonstrate that the superficial layers of adult mouse visual cortex retain the ability to undergo reversible experience-dependent homeostatic synaptic plasticity...
- Multiple phytochrome-interacting bHLH transcription factors repress premature seedling photomorphogenesis in darkness
Department of Plant and Microbial Biology, University of California, Berkeley, CA 94720, USA
Curr Biol 18:1815-23. 2008
..in colonizing the land was the evolution of a developmental strategy, termed skotomorphogenesis, whereby postgerminative seedlings emerging from buried seed grow vigorously upward in the subterranean darkness toward the soil surface.
- Flow of energy in the outer retina in darkness and in light
Jonathan D Linton
Department of Biochemistry, University of Washington, Seattle, WA 98195, USA
Proc Natl Acad Sci U S A 107:8599-604. 2010
..energy flows from these central mitochondria as phosphocreatine toward the photoreceptor's synaptic terminal in darkness. In light, it flows in the opposite direction as ATP toward the outer segment...
- Rapid induction of distinct stress responses after the release of singlet oxygen in Arabidopsis
Roel G L op den Camp
Institute of Plant Sciences, Plant Genetics, Swiss Federal Institute of Technology, , Switzerland
Plant Cell 15:2320-32. 2003
..Its biological activity in Arabidopsis exhibits a high degree of specificity that seems to be derived from the chemical identity of this reactive oxygen species and/or the intracellular location at which it is generated...
- Visual deprivation alters development of synaptic function in inner retina after eye opening
Department of Ophthalmology, UCSF School of Medicine, San Francisco, CA 94143, USA
Neuron 32:439-49. 2001
..These findings indicate there is a degree of activity-dependent plasticity in the mammalian retina that has not been previously described...
- Altered patterns of sleep and behavioral adaptability in NPAS2-deficient mice
Carol A Dudley
Department of Biochemistry, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX 75390 9152, USA
Science 301:379-83. 2003
..Our results indicate that NPAS2 plays a substantive role in maintaining circadian behaviors in normal LD and feeding conditions and that NPAS2 is critical for adaptability to food restriction...
- Scototaxis as anxiety-like behavior in fish
Laboratório de Neurociências e Comportamento, Instituto de Ciencias Biologicas, Universidade Federal do Para, Belem, Brazil
Nat Protoc 5:209-16. 2010
..When individual animals are exposed to the apparatus on only one occasion, results can be obtained in 20 min per fish...
- The growth of tomato (Lycopersicon esculentum Mill.) hypocotyls in the light and in darkness differentially involves auxin
Laboratoire de Physiologie Cellulaire et Moleculaire des Plantes, Universite Pierre et Marie Curie, Paris, France
Plant Sci 161:1067-74. 2001
..Interestingly, the dgt mutant and NPA-treated seedlings exhibit a looped phenotype only under red light, indicating that the negative gravitropism of hypocotyls also differentially involves auxin in the various light conditions...
- Rice NTRC is a high-efficiency redox system for chloroplast protection against oxidative damage
Juan Manuel Pérez-Ruiz
Instituto de Bioquimica Vegetal y Fotosintesis, Centro de Investigaciones Cientificas Isla de la Cartuja, 41092 Seville, Spain
Plant Cell 18:2356-68. 2006
..Constitutive expression of wild-type NTRC in mutant transgenic lines rescued this phenotype. Moreover, prolonged darkness followed by light/dark incubation produced an increase in hydrogen peroxide and lipid peroxidation in leaves and ..
- Fear of the dark: interactive effects of beliefs about danger and ambient darkness on ethnic stereotypes
Department of Psychology, University of British Columbia, Vancouver, BC, Canada
Pers Soc Psychol Bull 29:637-49. 2003
Two studies examined effects of ambient darkness and chronic beliefs about danger on activation of stereotypes about Blacks. Chronic beliefs were measured by a Belief in a Dangerous World (BDW) questionnaire...
- Of rodents and ungulates and melatonin: creating a uniform code for darkness by different signaling mechanisms
J H Stehle
Dr Senckenbergische Anatomie, Anatomisches Institut II, Johann Wolfgang Goethe Universitat Frankfurt, Germany
J Biol Rhythms 16:312-25. 2001
- Intracellular phosphorus metabolism of Microcystis aeruginosa under various redox potential in darkness
State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210093, PR China
Microbiol Res 158:345-52. 2003
..Phosphorus metabolism of Microcystis aeruginosa was studied under gradient redox potential from 252 mV to -70 mV in darkness. The release of phosphorus occurred in all the treatments, and this process was accelerated in darkness when the ..
- The sunflower HD-Zip transcription factor HAHB4 is up-regulated in darkness, reducing the transcription of photosynthesis-related genes
Pablo A Manavella
Cátedra de Biología Celular y Molecular, Facultad de Bioquimica y Ciencias Biologicas, Universidad Nacional del Litoral, CONICET, CC 242 Ciudad Universitaria, 3000, Santa Fe, Argentina
J Exp Bot 59:3143-55. 2008
..In this study it is shown that the expression of HAHB4 is induced in darkness and quickly disappears when plants are exposed to light...
- Constant darkness induces IL-6-dependent depression-like behavior through the NF-κB signaling pathway
Francisco J Monje
Department of Neurophysiology and Neuropharmacology, Medical University of Vienna, 1090 Vienna, Austria
J Neurosci 31:9075-83. 2011
..Here we investigate whether long-term light deprivation in the constant darkness (DD) paradigm affects depression-like behavior in mice and concomitantly modulates the levels of proinflammatory ..
- Experiments on mixotrophic protists and catastrophic darkness
School of Biological Sciences, University of East Anglia, Norwich, NR4 7TJ UK
Astrobiology 9:563-71. 2009
..Previous studies on the response of phototrophs to sudden prolonged darkness have focused on the survival of axenic strains...
- Time-course of tomato whole-plant respiration and fruit and stem growth during prolonged darkness in relation to carbohydrate reserves
INRA, Unité Plantes et Systèmes de culture Horticoles, Domaine St Paul, Site Agroparc, 84914 Avignon Cedex 9, France
Ann Bot 91:429-38. 2003
..the dynamics of growth, respiration and carbohydrate reserves of tomato plants were observed in prolonged darkness. Four days prior to the experiments, plants were exposed to high or low light levels and CO(2) concentrations...
- Retina is structured to process an excess of darkness in natural scenes
Charles P Ratliff
Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, PA 19104, USA
Proc Natl Acad Sci U S A 107:17368-73. 2010
- Synaptic influences on rat ganglion-cell photoreceptors
Kwoon Y Wong
Department of Neuroscience, Brown University, Box G L471, Providence, RI 02912, USA
J Physiol 582:279-96. 2007
..In constant darkness all ipRGCs received spontaneous excitatory and inhibitory synaptic inputs...
- The darkness at the end of the tunnel: summary and evaluation of an international symposium on light, endocrine systems and cancer
Department of Epidemiology CB 7435, University of North Carolina School of Public Health, Chapel Hill, NC 27599 7435, USA
Neuro Endocrinol Lett 23:71-8. 2002
..In the near future, both epidemiologic and laboratory research in this area are expected to grow appreciably in scope and scale...
- Sucrose-induced hypocotyl elongation of Arabidopsis seedlings in darkness depends on the presence of gibberellins
Key Laboratory of Arid and Grassland Agroecology Ministry of Education, School of Life Sciences, Lanzhou University, Lanzhou Gansu, People s Republic of China
J Plant Physiol 167:1130-6. 2010
..We conclude that sucrose can stimulate hypocotyl elongation of Arabidopsis seedlings in the dark in a GA-dependent manner...
- Response to darkness of late-responsive dark-inducible genes is positively regulated by leaf age and negatively regulated by calmodulin-antagonist-sensitive signalling in Arabidopsis thaliana
Department of Biological Sciences, Graduate School of Science, The University of Tokyo, Bunkyo-ku, Hongo, Japan
Plant Cell Physiol 46:1741-6. 2005
Induction after prolonged darkness distinguishes the late-responsive genes din2 and din9 from the early-responsive gene din3 in Arabidopsis...
- The role of low soil temperature in the inhibition of growth and PSII function during dark chilling in soybean genotypes of contrasting tolerance
Abram J Strauss
Section Botany, School of Environmental Sciences and Development, North West University, Potchefstroom Campus, Potchefstroom 2522, South Africa
Physiol Plant 131:89-105. 2007
- The autophagy-associated Atg8 gene family operates both under favourable growth conditions and under starvation stresses in Arabidopsis plants
Department of Plant Sciences, The Weizmann Institute of Science, Rehovot 76100, Israel
J Exp Bot 56:2839-49. 2005
..analysed in young Arabidopsis plants grown under favourable growth conditions or following exposure to prolonged darkness or sugar starvation...
- Patterns of expression and normalized levels of the five Arabidopsis phytochromes
Robert A Sharrock
Department of Plant Sciences and Plant Pathology, 119 ABS Building, Montana State University, Bozeman, Montana 59717 3140, USA
Plant Physiol 130:442-56. 2002
..These studies indicate that, with the exception of phytochrome A, the family of phytochrome photoreceptors in Arabidopsis constitutes a quite stable and very broadly distributed array of sensory molecules...
- The mitochondrial electron transfer flavoprotein complex is essential for survival of Arabidopsis in extended darkness
Department of Plant Sciences, University of Oxford, South Parks Road, Oxford, UK
Plant J 47:751-60. 2006
..mutants of the ETFbeta gene revealed accelerated senescence and early death compared to wild-type during extended darkness. Furthermore in contrast to wild-type, the etfb mutants demonstrated a significant accumulation of several amino ..
- Distinct roles of GIGANTEA in promoting flowering and regulating circadian rhythms in Arabidopsis
Institute of Biological Sciences, University of Tsukuba, Tsukuba, Ibaraki 305 8572, Japan
Plant Cell 17:2255-70. 2005
..that do not control flowering are altered in 35S:GI and gi mutant plants under continuous light and continuous darkness, and the phase of expression of these genes is changed under diurnal cycles...
- Morning and evening peaks of activity rely on different clock neurons of the Drosophila brain
Institut de Neurobiologie Alfred Fessard NGI, CNRS UPR 2216, Centre National de la Recherche Scientifique, av de la Terrasse, 91198 Gif sur Yvette, France
Nature 431:869-73. 2004
..Furthermore, we show that the LN(v)s alone can generate 24 h activity rhythms in constant darkness, indicating that the morning oscillator is sufficient to drive the circadian system.
- DELLA protein function in growth responses to canopy signals
Plant Ecophysiology, Institute of Environmental Biology, Utrecht University, Sorbonnelaan 16, 3584 CA, Utrecht, The Netherlands
Plant J 51:117-26. 2007
..These data provide novel information on the regulation of shade-avoidance under ecologically important conditions, defining the importance of DELLA proteins and GA and unravelling the existence of GA- and DELLA-independent mechanisms...
- A mechanistic model of photosynthesis in microalgae
F Camacho Rubio
Department of Chemical Engineering, University of Granada, E-18071 Granada, Spain
Biotechnol Bioeng 81:459-73. 2003
..These earlier models could not explain the photosynthesis-irradiance behavior under the full range of irradiance scenarios-a shortcoming that is overcome in the model developed in this work...
- Nighttime stomatal conductance and transpiration in C3 and C4 plants
Mairgareth A Caird
Department of Land, Air, and Water Resources, University of California, Davis, California 95616, USA
Plant Physiol 143:4-10. 2007
- Genome-wide dynamic transcriptional profiling of the light-to-dark transition in Synechocystis sp. strain PCC 6803
Ryan T Gill
Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
J Bacteriol 184:3671-81. 2002
- The Arabidopsis mutant cev1 links cell wall signaling to jasmonate and ethylene responses
School of Biological Sciences, University of East Anglia, Norwich NR4 7TJ, United Kingdom
Plant Cell 14:1557-66. 2002
..We propose that the cell wall can signal stress responses in plants...
- Elongated mesocotyl1, a phytochrome-deficient mutant of maize
Ruairidh J H Sawers
Boyce Thompson Institute, Cornell University, Tower Road, Ithaca, New York 14853, USA
Plant Physiol 130:155-63. 2002
..Thus, the elm1 mutant of maize provides the first direct evidence for phytochrome-mediated modulation of flowering time in this agronomically important species...
- Patterned vision causes CRE-mediated gene expression in the visual cortex through PKA and ERK
Institute of Neuroscience of Consiglio Nazionale delle Ricerche, 56100 Pisa, Italy
J Neurosci 23:7012-20. 2003
..Finally, because CRE-mediated gene expression was totally dependent on ERK activation, we suggest that PKA action on CRE-mediated gene expression is mediated by ERK...
- Rapid critical period induction by tonic inhibition in visual cortex
Laboratory for Neuronal Circuit Development, The Institute of Physical and Chemical Research RIKEN Brain Science Institute, Saitama 351 0198, Japan
J Neurosci 23:6695-702. 2003
..Raising wild-type mice in complete darkness from birth delayed the peak sensitivity to MD as in other mammals...
- Interaction of the response regulator ARR4 with phytochrome B in modulating red light signaling
Institut für Biologie II Botanik, Universitat Freiburg, Schanzlestrasse 1, 79104 Freiburg, Germany
Science 294:1108-11. 2001
..We propose that the response regulator 4 acts as an output element of a two-component system that modulates red light signaling on the level of the phytochrome B photoreceptor...
- Involvement of indole-3-acetic acid in the circadian growth of the first internode of Arabidopsis
Plant Biochemistry and Physiology Laboratory, University of Geneva, 3 Place de l Université, CH 1211 Geneva 4, Switzerland
Planta 209:136-42. 1999
..These observations suggest that IAA metabolism is an essential factor in the regulation of the circadian growth rhythm of Arabidopsis floral stems...
- Light-dependent sequestration of TIMELESS by CRYPTOCHROME
M F Ceriani
Department of Cell Biology and NSF Center for Biological Timing, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA
Science 285:553-6. 1999
..clocks consisting of negative feedback loops of gene regulation that facilitate adaptation to cycles of light and darkness. In this study, CRYPTOCHROME (CRY), a protein involved in circadian photoperception in Drosophila, is shown to ..
- Anatomical and functional demonstration of a multisynaptic suprachiasmatic nucleus adrenal (cortex) pathway
R M Buijs
Netherlands Institute for Brain Research, Amsterdam, The Netherlands
Eur J Neurosci 11:1535-44. 1999
..As a consequence, it is proposed that the SCN utilizes neuronal pathways to spread its time of the day message, not only to the pineal, but also to other organs, including the adrenal, utilizing the autonomic nervous system...
- SLAC1 is required for plant guard cell S-type anion channel function in stomatal signalling
Plant Biology, Department of Biological and Environmental Sciences, University of Helsinki, FI 00014 Helsinki, Finland
Nature 452:487-91. 2008
..A low homology of SLAC1 to bacterial and fungal organic acid transport proteins, and the permeability of S-type anion channels to malate suggest a vital role for SLAC1 in the function of S-type anion channels...
- Daily rhythms of food-anticipatory behavioral activity do not require the known circadian clock
Kai Florian Storch
Department of Neurobiology, Harvard Medical School, Boston, MA 02115, USA
Proc Natl Acad Sci U S A 106:6808-13. 2009
..known circadian clock function in all tissues exhibit normal FAA both in a light-dark cycle and in constant darkness, regardless of whether the mutation disables the positive or negative limb of the clock feedback mechanism...
- Impact of light on Hypocrea jecorina and the multiple cellular roles of ENVOY in this process
Division of Gene Technology and Applied Biochemistry, Institute for Chemical Engineering, Vienna University of Technology, Getreidemarkt 9 1665, A 1060 Wien, Austria
BMC Genomics 8:449. 2007
..Based on these data, we analyzed whether these genes are influenced by ENVOY and if overexpression of ENVOY in darkness would be sufficient to execute its function.
- Integration of circadian and phototransduction pathways in the network controlling CAB gene transcription in Arabidopsis
A J Millar
National Science Foundation Center for Biological Timing, Department of Biology, University of Virginia, Charlottesville 22903, USA
Proc Natl Acad Sci U S A 93:15491-6. 1996
..Under short photoperiods, this pattern of entrainment ensures that dawn coincides with a phase of high light responsiveness, whereas under long photoperiods, the light response at dawn is reduced...
- The critical role of Arabidopsis electron-transfer flavoprotein:ubiquinone oxidoreductase during dark-induced starvation
Department of Plant Sciences, University of Oxford, Oxford OX1 3RB, United Kingdom
Plant Cell 17:2587-600. 2005
..insertional mutants of Arabidopsis ETFQO revealed a dramatic reduction in their ability to withstand extended darkness, resulting in senescence and death within 10 d after transfer, whereas wild-type plants remained viable for at ..
- Light signalling mediated by phytochrome plays an important role in cold-induced gene expression through the C-repeat/dehydration responsive element (C/DRE) in Arabidopsis thaliana
Hyoun Joung Kim
Kumho Life and Environmental Science Laboratory, Puk Gu, Gwang Ju, Korea
Plant J 29:693-704. 2002
- Plant circadian clocks increase photosynthesis, growth, survival, and competitive advantage
Antony N Dodd
Department of Plant Sciences, University of Cambridge, Downing Street, Cambridge, CB2 3EA, UK
Science 309:630-3. 2005
..This explains why plants gain advantage from circadian control...
- Alteration of organic acid metabolism in Arabidopsis overexpressing the maize C4 NADP-malic enzyme causes accelerated senescence during extended darkness
Botanisches Institut, Universitat zu Koln, 50931 Cologne, Germany
Plant Physiol 145:640-52. 2007
..Thus, in prolonged darkness these metabolites are consumed faster than in the wild type and, as a consequence, MEm plants enter irreversible ..
- Effect of light intensity on the phase and period response curves in the nocturnal field mouse Mus booduga
Vijay Kumar Sharma
Chronobiology Laboratory, Evolutionary and Organismal Biology Unit, Jawaharlal Nehru Center for Advanced Scientific Research, Jakkur, Bangalore, Karnataka, India
Chronobiol Int 20:223-31. 2003
..PRCs and tauRCs were constructed by exposing animals free-running in constant darkness (DD), to fluorescent light pulses (LPs) of 100 lux and 1000 lux intensities for 15 min duration...
- Flowering of the grass Lolium perenne: effects of vernalization and long days on gibberellin biosynthesis and signaling
Colleen P Macmillan
Commonwealth Scientific and Industrial Research Organization Plant Industry, Canberra, Australian Capital Territory 2601, Australia
Plant Physiol 138:1794-806. 2005
..Thus, although vernalization and GA are both required for flowering of L. perenne, GA signaling is independent of vernalization that apparently impacts on unrelated processes...
- Scheduling of sleep/darkness affects the circadian phase of night shift workers
Division of Sleep Medicine, Department of Medicine, Brigham and Women s Hospital, Harvard Medical School, 221 Longwood Avenue, BL 438M, Boston, MA 02115, USA
Neurosci Lett 384:316-20. 2005
..Our results indicate that scheduled sleep/darkness can aid in adaptation to night shift work by inducing both advance and delay phase shifts, depending on the ..
- State-dependent effects of light-dark cycle on somatosensory and visual cortex EEG in rats
Department of Veterinary and Comparative Anatomy, Pharmacology and Physiology, College of Veterinary Medicine, Washington State University, PO Box 646520, Pullman, WA 99164-6520, USA
Am J Physiol Regul Integr Comp Physiol 289:R1083-9. 2005
..We concluded that the SSctx and Vctx EEGs are differentially affected by light during subsequent sleep. Results provide support for the notion that regional sleep intensity is dependent on prior regional afferent input...
- The function of ascorbate oxidase in tobacco
Crop Performance and Improvement Division, Rothamsted Research, Harpenden, Herts, AL5 2JQ, United Kingdom
Plant Physiol 132:1631-41. 2003
..Taken together, these data show that there is an interaction between hormone, redox, and light signals at the level of the apoplast via modulation of ion of AA content...
- [Primary study on photosynthetic characteristics of Dendrobium nobile]
Institute of Ecology and Geobotany, Yunnan University, Kunming 650091
Zhong Yao Cai 26:157-9. 2003
..nobile could change from CAM to C3 photosynthetic metabolism. It may be one of main reasons for D. nobile to adapt to the shade-requiring environment, the slow growth and rareness in nature...
- Novel features of cryptochrome-mediated photoreception in the brain circadian clock of Drosophila
Institut de Neurobiologie Alfred Fessard, Centre National de la Recherche Scientifique, Unité Propre de Recherche 2216, 91198 Gif sur Yvette, France
J Neurosci 24:1468-77. 2004
..show that the photoreceptive DN1 neurons do not behave as autonomous oscillators, because their PER oscillations in constant darkness rapidly damp out in the absence of pigment-dispersing-factor signaling from the ventral lateral neurons.
- Effects of transient and continuous wheel running activity on the upper and lower limits of entrainment to light-dark cycles in female hamsters
Juan José Chiesa
Departament de Fisiologia, Facultat de Farmacia, Universitat de Barcelona, Barcelona, Spain
Chronobiol Int 24:215-34. 2007
..All of these indicate a different effect of the wheel running on the upper and lower limits of entrainment...
- Contribution of C3 carboxylation to the circadian rhythm of carbon dioxide uptake in a Crassulacean acid metabolism plant Kalanchoë daigremontiana
Tomasz P Wyka
Adam Mickiewicz University, Biology Department, Al Niepodległości 14, 61 714 Poznań, Poland
J Exp Bot 54:1471-9. 2003
..Together with the observation that rates of CO(2) uptake under continuous light were higher than in darkness, the evidence shows that C(3) carboxylation greatly contributes to the generation of rhythmic CO(2) uptake in ..
- Effects of prolonged exposure to darkness on circadian photic responsiveness in the mouse
Circadian Rhythm Laboratory, University of South Carolina, Walterboro, South Carolina 29488, USA
Chronobiol Int 20:417-40. 2003
..by an endogenous pacemaker but are modulated by environmental cycles, principally the alternation of light and darkness. Although much is known about nonparametric effects of light on the circadian system, little is known about other ..
- Comparison of carotenoid content, gene expression and enzyme levels in tomato (Lycopersicon esculentum) leaves
Andrew J Simkin
Génétique Moléculaire des Plantes, Universite, J Fourier and CNRS UMR5575, BP53, F 38041 Grenoble Cedex 9, France
Z Naturforsch C 58:371-80. 2003
..accumulation under norflurazon treatment in the dark suggests a down-regulation of carotenoid formation in darkness However, prolonged dark conditions, or treatment with photosynthetic inhibitors, surprisingly led to higher ..
- Combinations of bright light, scheduled dark, sunglasses, and melatonin to facilitate circadian entrainment to night shift work
Stephanie J Crowley
Biological Rhythms Research Laboratory, Rush University Medical Center, Chicago, IL 60612, USA
J Biol Rhythms 18:513-23. 2003
- Gating of the rapid shade-avoidance response by the circadian clock in plants
Michael G Salter
Department of Biology, University of Leicester, Leicester LE1 7RH, UK
Nature 426:680-3. 2003
..4). Furthermore PIL1 and TOC1 are both required for the accelerated growth associated with the shade-avoidance response...
- Entrainment of 2 subjective nights by daily light:dark:light:dark cycles in 3 rodent species
Michael R Gorman
Departments of Psychology, University of California, San Diego, La Jolla, CA 92093 0109, USA
J Biol Rhythms 18:502-12. 2003
..by deletions of photophases on individual days, by exposure to skeleton photoperiods, and by transfer to constant darkness. As in Syrian hamsters, the one-time substitution of darkness for one 7-h photophase did not grossly alter ..
- Antisense suppression of the Arabidopsis PIF3 gene does not affect circadian rhythms but causes early flowering and increases FT expression
Institute of Biological Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8572, Japan
FEBS Lett 557:259-64. 2004
..These results suggest that PIF3 may play an important role in the control of flowering through clock-independent regulation of CO and FT gene expression in Arabidopsis...
- HY5, Circadian Clock-Associated 1, and a cis-element, DET1 dark response element, mediate DET1 regulation of chlorophyll a/b-binding protein 2 expression
Bridey B Maxwell
Plant Biology Laboratory, The Salk Institute for Biological Studies, La Jolla, California 92037, USA
Plant Physiol 133:1565-77. 2003
..We conclude that DET1 represses the CAB2 promoter in the dark by regulating the binding of two factors, CAB2 DET1-associated factor 1 and Circadian Clock-Associated 1, to the DtRE...
- The TIME FOR COFFEE gene maintains the amplitude and timing of Arabidopsis circadian clocks
Department of Biological Sciences, University of Warwick, Coventry CV4 7AL, United Kingdom
Plant Cell 15:2719-29. 2003
..In contrast to tic and elf3 single mutants, tic elf3 double mutants are completely arrhythmic. Even the robust circadian clock of plants cannot function with defects at two different phases...
- Temperature rhythm reentrains faster than locomotor rhythm after a light phase shift
Faculty of Pharmaceutical Sciences, Josai International University, 1 Gumyo, Togane, Chiba, 283-8555, Japan
Physiol Behav 88:404-10. 2006
..These results therefore suggest that the circadian rhythms of Tb and LA are intrinsically regulated by different pacemaker or effector mechanisms...
- Plant sciences. A CONSTANS experience brought to light
Department of Molecular, Cell and Developmental Biology, University of California, Los Angeles, CA 90095, USA
Science 303:965-6. 2004
- Photoreceptor regulation of CONSTANS protein in photoperiodic flowering
Max Planck Institute for Plant Breeding, Carl-von-Linne Weg 10, D-50829 Cologne, Germany
Science 303:1003-6. 2004
..We show that light stabilizes nuclear CO protein in the evening, whereas in the morning or in darkness the protein is degraded by the proteasome...
- Transcript levels in plant mitochondria show a tight homeostasis during day and night
Molekulare Botanik, Universitat Ulm, 89069, Ulm, Germany
Mol Genet Genomics 276:71-8. 2006
..This finding suggests that available steady state transcript levels in plant mitochondria are sufficient to provide the required biochemical capacities also at times of peak respiratory and physiological demands...
- The early dark-response in Arabidopsis thaliana revealed by cDNA microarray analysis
Department of Biochemistry, Cellular and Molecular Biology, The University of Tennessee, Knoxville, TN 37996-0840, USA
Plant Mol Biol 60:321-42. 2006
Despite intense research on light responses in plants, the consequences of a simple shift from light to darkness remain poorly characterized...
- Influence of the corticosterone rhythm on photic entrainment of locomotor activity in rats
Interactions Fonctionnelles en Neuroendocrinologie, , , , Marseille, France
J Biol Rhythms 19:144-56. 2004
..Under constant darkness, the corticosterone rhythm did not show any synchronizing effect, providing evidence that it participates in ..
- Effects of photoperiod on rat motor activity rhythm at the lower limit of entrainment
Departament de Fisiologia, Facultat de Farmacia, Universitat de Barcelona, Spain
J Biol Rhythms 19:216-25. 2004
- Circadian organization of a subarctic rodent, the northern red-backed vole (Clethrionomys rutilus)
Ronald J Tavernier
Behavioral and Evolutionary Neuroscience Laboratory, Alaskan Basic Neuroscience Program, Institute of Arctic Biology, University of Alaska Fairbanks, 99775-7000, USA
J Biol Rhythms 19:238-47. 2004
..Whether this phenotypic variation in circadian organization, with circadian, ultradian, and arrhythmic wheel-running activity patterns in constant lighting conditions, is a novel adaptation to life in the arctic remains to be elucidated...
- c-Fos expression in the brains of behaviorally "split" hamsters in constant light: calling attention to a dorsolateral region of the suprachiasmatic nucleus and the medial division of the lateral habenula
Department of Neurology, University of Massachusetts Medical School, Worcester, Massachusetts 01655, USA
J Biol Rhythms 20:419-29. 2005
..c-Fos levels, in a pattern resembling that seen in normal, unsplit hamsters during subjective day in constant darkness; the opposite side was labeled only within a central-dorsolateral area of the caudal SCN, in a region that likely ..
- Independent roles for EARLY FLOWERING 3 and ZEITLUPE in the control of circadian timing, hypocotyl length, and flowering time
Woe Yeon Kim
Department of Plant Cellular and Molecular Biology, Plant Biotechnology Center, Ohio State University, Columbus, OH 43210, USA
Plant Physiol 139:1557-69. 2005
..These results show that elf3-1 can derepress late flowering through a CO-independent mechanism. ELF3 may act at more than one juncture, possibly posttranscriptionally...
- Repeated light-dark shifts speed up body weight gain in male F344 rats
Ling Ling Tsai
Dept of Psychology, National Chung Cheng Univ, 168 University Road, Min Hsiung, Chia Yi 621, Taiwan, R O C
Am J Physiol Endocrinol Metab 289:E212-7. 2005
..Features of these results, such as increased body weight gain and food intake, and reduced activity, suggest a causal relationship of chronic circadian desynchronization and changes in body weight control in male albino F344 rats...
- Control of nitrate reductase by circadian and diurnal rhythms in tomato
Dawn E Tucker
Photosynthesis Research Unit, USDA/ARS, Department of Plant Biology, University of Illinois, Urbana, IL 61801, USA
Planta 219:277-85. 2004
..Although there is a significant steady-state pool of apparently inactive NR throughout the diurnal, our data indicate that tomato leaves are unable to draw on this reserve to compensate for NR protein that is degraded during shading...
- Cell autonomous circadian waves of the APRR1/TOC1 quintet in an established cell line of Arabidopsis thaliana
Laboratory of Molecular Microbiology, School of Agriculture, Nagoya University, Chikusa-ku, Nagoya, 464-8601 Japan
Plant Cell Physiol 44:360-5. 2003
..To our knowledge, this is the first indication of cell autonomous circadian rhythms in cultured cells in Arabidopsis thaliana, which will provide us with an alternative and advantageous means to characterize the plant biological clock...
- Carbon dioxide signalling in plant leaves
Institute of Botany, Department of Biology, Technical University Darmstadt, Schnittspahnstrasse 3 5, 64287 Darmstadt, Germany
C R Biol 330:375-81. 2007
..During CAM, largely different internal CO(2) concentrations prevail in the leaves, offering opportunities to study the effect of lateral diffusion of CO(2) in synchronizing photosynthetic activity over the entire leaves...
- MYB transcription factors in the Arabidopsis circadian clock
Isabelle A Carre
Department of Biological Sciences, University of Warwick, Coventry CV4 7AL, UK
J Exp Bot 53:1551-7. 2002
..This review discusses experimental evidence for these hypotheses...
- Action spectrum for cryptochrome-dependent hypocotyl growth inhibition in Arabidopsis
Universite Paris VI, Tour 53 E 5, Casier 156, 4, place Jussieu, 75252 Paris Cedex 05, France
Plant Physiol 129:774-85. 2002
..The possible role of additional photoreceptors (in particular phytochrome A) in cryptochrome responses is discussed...
- Evidence for non-circadian light/dark-regulated expression of Hsp70s in spinach leaves
Q B Li
Plant Molecular and Cellular Biology Program, Department of Environmental Horticulture, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, Florida 32611-0670, USA
Plant Physiol 125:1633-42. 2001
- Circadian clock resetting by sleep deprivation without exercise in Syrian hamsters: dark pulses revisited
Ralph E Mistlberger
Department of Psychology, Simon Fraser University, Burnaby, British Columbia, Canada
J Biol Rhythms 17:227-37. 2002
..The lack of effect of subsequent LL on the magnitude of shifts to sleep deprivation in the dark suggests that LL reduces responsivity to light by processes that take >3 h of dark to reverse...
- Isolation of a CONSTANS ortholog from Pharbitis nil and its role in flowering
Department of Energy Plant Research Laboratory, Michigan State University, East Lansing, Michigan 48824-1312, USA
Plant Physiol 125:1821-30. 2001
..After transfer from continuous light to darkness, PnCO showed a circadian pattern of expression...
- Circadian rhythms of body temperature and motor activity in rodents their relationships with the light-dark cycle
, , Paris, France
Life Sci 68:2645-56. 2001
..The purpose of this review is to summarize the results obtained on the circadian rhythms of body temperature and motor activity throughout the daily cycle in order to clarify the relationships between these two functions...
- Expression and stability of Arabidopsis CDC6 are associated with endoreplication
M M Castellano
Centro de Biologia Molecular Severo Ochoa, , , Cantoblanco, 28049 Madrid, Spain
Plant Cell 13:2671-86. 2001
..These conclusions may apply to endoreplicating cells in other tissues of the plant and to endoreplicating cells in other eukaryotes...
- Light-dependent gene expression for proteins in the respiratory chain of potato leaves
A S Svensson
Department of Plant Physiology, Lund University, Box 117, S-221 00 Lund, Sweden
Plant J 28:73-82. 2001
..In addition to the specific change in nda1, a general, slower down-regulation in darkness was seen for the other NAD(P)H dehydrogenase genes...