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Species | J J CasalSummaryAffiliation: Universidad de Buenos Aires Country: Argentina Publications
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Publications
Missense mutation in the PAS2 domain of phytochrome A impairs subnuclear localization and a subset of responsesMarcelo J Yanovsky
IFEVA, Facultad de Agronomia, Universidad de Buenos Aires, Av San Martin 4453, 1417 Buenos Aires, Argentina
Plant Cell 14:1591-603. 2002..We propose that the PAS2 domain of phytochrome A is necessary to initiate signaling in HIR but not in VLFR, likely via interaction with a specific partner...
Regulation of gene expression by lightJorge J Casal
IFEVA, Facultad de Agronomia, Universidad de Buenos Aires y CONICET, Buenos Aires, Argentina
Int J Dev Biol 49:501-11. 2005..Some transcriptional regulators are shared by light, circadian and/or hormonal signalling circuits creating complex networks that interactively integrate environmental and endogenous cues...- Conditional synergism between cryptochrome 1 and phytochrome B is shown by the analysis of phyA, phyB, and hy4 simple, double, and triple mutants in ArabidopsisJ J Casal
Departamento de Ecologia, Facultad de Agronomia, Universidad de Buenos Aires, Av San Martin 4453, 1417 Buenos Aires, Argentina
Plant Physiol 118:19-25. 1998.... - Phytochromes, cryptochromes, phototropin: photoreceptor interactions in plantsJ J Casal
IFEVA, Departamento de Ecologia, Facultad de Agronomia, Universidad de Buenos Aires, Argentina
Photochem Photobiol 71:1-11. 2000..Experiments under natural radiation are beginning to show that the interactions create a phototransduction network with emergent properties. This provides a more robust system for light perception in plants... - Two photobiological pathways of phytochrome A activity, only one of which shows dominant negative suppression by phytochrome BJ J Casal
IFEVA, Facultad de Agronomia, Universidad de Buenos Aires, Argentina
Photochem Photobiol 71:481-6. 2000..We conclude that phyA is intrinsically able to initiate two discrete photoresponses even when a single end-point process is considered... - The serine-rich N-terminal domain of oat phytochrome a helps regulate light responses and subnuclear localization of the photoreceptorJorge J Casal
IFEVA, Facultad de Agronomia, Universidad de Buenos Aires, Argentina
Plant Physiol 129:1127-37. 2002..We propose that the N-terminal serine-rich domain of phyA is involved in channeling downstream signaling via the VLFR or HIR pathways in different cellular contexts... - Light, phytochrome signalling and photomorphogenesis in ArabidopsisJorge J Casal
IFEVA, Faculty of Agronomy, University of Buenos Aires and National Research Council, Av San Martin 4453, 1417 Buenos Aires, Argentina
Photochem Photobiol Sci 2:625-36. 2003..Here we describe the connection between different features of the phytochrome signalling network and the versatile relationship between light signals and physiological outputs shown by phytochromes... - Environmental cues affecting developmentJorge J Casal
IFEVA, Facultad de Agronomia, Universidad de Buenos Aires y Consejo Nacional de Investigaciones Científicas y Técnicas, Av San Martin 4453, 1417, Buenos Aires, Argentina
Curr Opin Plant Biol 5:37-42. 2002..The elements of the circuitry, their connections, and their functional significance are being uncovered thanks to the analysis of genetic interactions, protein-protein interactions, sub-cellular localisation and transcriptome patterns... - Resetting of the circadian clock by phytochromes and cryptochromes in ArabidopsisM J Yanovsky
IFEVA, Faculty of Agronomy, University of Buenos Aires, Argentina
J Biol Rhythms 16:523-30. 2001..The signaling proteins FHY1 and FHY3 are shared by phyA-mediated photomorphogenesis and phyA input to the clock... - Hierarchical coupling of phytochromes and cryptochromes reconciles stability and light modulation of Arabidopsis developmentM A Mazzella
IFEVA, Facultad de Agronomia, Universidad de Buenos Aires, Avenida San Martin 4453, 1417 Buenos Aires, Argentina
Development 128:2291-9. 2001.... - CP3 is involved in negative regulation of phytochrome A signalling in ArabidopsisMatías H Quinn
IFEVA, Facultad de Agronomia, Universidad de Buenos Aires and CONICET, Av San Martin 4453, 1417 Buenos Aires, Argentina
Planta 215:557-64. 2002..The phenotype under pulsed FR but not the adult phenotype required phyA. We propose that CP3 is involved in the negative regulation of the signalling pathway that saturates with transient activation of phyA... - Phytochrome A enhances the promotion of hypocotyl growth caused by reductions in levels of phytochrome B in its far-red-light-absorbing form in light-grown Arabidopsis thalianaJ J Casal
Departamento de Ecologia, Facultad de Agronomia, Universidad de Buenos Aires, Argentina
Plant Physiol 112:965-73. 1996..A product of phyA is therefore proposed to enhance the hypocotyl-growth response to decreases in phyB in FR-light-absorbing form in light grown seedlings... - Brassinosteroid mutants uncover fine tuning of phytochrome signalingLaura G Luccioni
IFEVA, Faculty of Agronomy, University of Buenos Aires and National Research Council, , 1417 Buenos Aires, Argentina
Plant Physiol 128:173-81. 2002..We propose that the opposite regulation of VLFR versus LFR and HIR could be part of a context-dependent mechanism of adjustment of sensitivity to light signals... - The VLF loci, polymorphic between ecotypes Landsberg erecta and Columbia, dissect two branches of phytochrome A signal transduction that correspond to very-low-fluence and high-irradiance responsesM J Yanovsky
Departamento de Ecologia, Facultad de Agronomia, Universidad de Buenos Aires, Argentina
Plant J 12:659-67. 1997..This is the first application of the analysis of quantitative trait loci polymorphic between ecotypes to dissect transduction chains of environmental signals... - New Arabidopsis recombinant inbred lines (Landsberg erecta x Nossen) reveal natural variation in phytochrome-mediated responsesTeresa M Alconada Magliano
IFEVA, Facultad de Agronomia, Universidad de Buenos Aires y Consejo Nacional de Investigaciones Científicas y Técnicas, 1417 Buenos Aires, Argentina
Plant Physiol 138:1126-35. 2005..Such flexibility in combination of responses is observed among accessions and could aid in the adjustment to different microenvironments... - GIGANTEA regulates phytochrome A-mediated photomorphogenesis independently of its role in the circadian clockKarina Andrea Oliverio
IFEVA, Facultad de Agronomia, Universidad de Buenos Aires and Consejo Nacional de Investigaciones Científicas y Técnicas, 1417 Buenos Aires, Argentina
Plant Physiol 144:495-502. 2007..We conclude that while GI does not affect the high-irradiance responses of phyA, it does affect phyA-mediated very-low-fluence responses via mechanisms that do not obviously involve its circadian functions... - Promotion of photomorphogenesis by COP1Hernan E Boccalandro
I F E V A, Faculty of Agronomy, University of Buenos Aires, Av San Martin 4453, 1417, Buenos Aires, Argentina
Plant Mol Biol 56:905-15. 2004..We hypothesize that COP1 could be involved in degradation of negative regulators of photomorphogenesis or in transcriptional activation, as observed for some E3 ligases in mammalian development... - The serine-rich N-terminal region of Arabidopsis phytochrome A is required for protein stabilitySantiago A Trupkin
IFEVA, Facultad de Agronomia, Universidad de Buenos Aires and CONICET, Av San Martin 4453, 1417, Buenos Aires, Argentina
Plant Mol Biol 63:669-78. 2007..These findings do not support the involvement of the serine-rich region in negative regulation but they are consistent with a recent report suggesting that phyA turnover is regulated by phosphorylation... - Increased phytochrome B alleviates density effects on tuber yield of field potato cropsHernan E Boccalandro
IFEVA, Faculty of Agronomy, University of Buenos Aires, Avenida San Martin 4453, 1417 Buenos Aires, Argentina
Plant Physiol 133:1539-46. 2003..We propose that enhanced PHYB expression could be used in breeding programs to shift optimum planting densities to higher levels... - Arabidopsis thaliana life without phytochromesBarbara Strasser
Fundacion Instituto Leloir, Instituto de Investigaciones Bioquímicas de Buenos Aires Consejo Nacional de Investigaciones Científicas y Técnicas and Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, C1405BWE Buenos Aires, Argentina
Proc Natl Acad Sci U S A 107:4776-81. 2010..We conclude that Arabidopsis development is stalled at several points in the presence of light suitable for photosynthesis but providing no photomorphogenic signal... - Finding unexpected patterns in microarray dataSusana Perelman
IFEVA, , Universidad de Buenos Aires, , 1417-Buenos Aires, Argentina
Plant Physiol 133:1717-25. 2003..The unconventional combination of standard descriptive multivariate methods offers a previously unrecognized tool to uncover unexpected information... - PHYTOCHROME KINASE SUBSTRATE1 regulates root phototropism and gravitropismHernan E Boccalandro
IFEVA, Facultad de Agronomia, Universidad de Buenos Aires and Consejo Nacional de Investigaciones Científicas y Técnicas, 1417, Buenos Aires, Argentina
Plant Physiol 146:108-15. 2008..After a phyA-dependent increase in its expression, PKS1 positively affects root phototropism and both effects contribute to negative curvature in response to unilateral blue light... - Comparative genomic analysis of light-regulated transcripts in the SolanaceaeMariana Rutitzky
IFEVA, Facultad de Agronomia, Universidad de Buenos Aires and CONICET, Buenos Aires, Argentina
BMC Genomics 10:60. 2009..Here we compared transcriptional responses to light in different species of the Solanaceae to investigate common as well as species-specific changes in gene expression... 
Autophagy regulated by day length determines the number of fertile florets in wheatHernan O Ghiglione
Bioquimica, Facultad de Agronomia, Universidad de Buenos Aires, Av San Martin 4453, 1417 Buenos Aires, Argentina
Plant J 55:1010-24. 2008..We propose a model in which developmentally generated sugar starvation triggers floret autophagy, and long days intensify these processes due to the increased carbohydrate consumption caused by the accelerated plant development...- Synergism of red and blue light in the control of Arabidopsis gene expression and developmentRomina Sellaro
IFEVA, Facultad de Agronomia, Universidad de Buenos Aires, and CONICET, Av San Martin 4453, 1417 Buenos Aires, Argentina
Curr Biol 19:1216-20. 2009..The persistence of the light-derived signal into the night commits the seedling to a morphogenetic and physiological program consistent with a photosynthetic lifestyle... - Bell-like homeodomain selectively regulates the high-irradiance response of phytochrome ARoberto J Staneloni
Fundacion Instituto Leloir, Instituto de Investigaciones Bioquímicas Buenos Aires, Consejo Nacional de Investigaciones Cientificas y Técnicas and Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, C1405BWE Buenos Aires, Argentina
Proc Natl Acad Sci U S A 106:13624-9. 2009..BLH1 enhanced BLH1 expression and its promotion by FR. We conclude that BLH1 specifically regulates HIR and not VLFR of phytochrome A... - A constitutive shade-avoidance mutant implicates TIR-NBS-LRR proteins in Arabidopsis photomorphogenic developmentAna Faigón-Soverna
IFEVA Facultad de Agronomía, Universidad de Buenos Aires, Consejo Nacional de Investigaciones Cientificas y Tecnicas, 1417 Buenos Aires, Argentina
Plant Cell 18:2919-28. 2006..In Drosophila melanogaster and Caenorhabditis elegans, TIR domain proteins are implicated in both development and immunity. Thus, the dual role of the TIR domain is conserved across kingdoms... - Pre-germination seed-phytochrome signals control stem extension in dark-grown Arabidopsis seedlingsTeresa Alconada Magliano
IFEVA, Facultad de Agronomia, Universidad de Buenos Aires, Avenida San Martin 4453, 1417 Buenos Aires, Argentina
Photochem Photobiol Sci 3:612-6. 2004..We propose that trans-developmental phase signals could help plants to adjust to their environment... - The Cape Verde Islands allele of cryptochrome 2 enhances cotyledon unfolding in the absence of blue light in ArabidopsisJavier F Botto
IFEVA, Consejo Nacional de Investigaciones Científicas y Técnicas and Facultad de Agronomía, Universidad de Buenos Aires, Avenida San Martin 4458, 1417 Buenos Aires, Argentina
Plant Physiol 133:1547-56. 2003..We conclude that the blue light photoreceptor cryptochrome 2 can modulate seedling photomorphogenesis in the absence of blue light. In addition to the nuclear loci, we identified cytoplasmic effects on seedling de-etiolation... - Phytochrome B enhances photosynthesis at the expense of water-use efficiency in ArabidopsisHernan E Boccalandro
IFEVA, Facultad de Agronomia, Universidad de Buenos Aires, and Consejo Nacional de Investigaciones Cientificas y Tecnicas, 1417 Buenos Aires, Argentina
Plant Physiol 150:1083-92. 2009.... - Suppression of pleiotropic effects of functional cryptochrome genes by Terminal Flower 1Ana Sabrina Buchovsky
IFEVA, Fisiología Vegetal, Facultad de Agronomia, Universidad de Buenos Aires, Buenos Aires, Argentina
Genetics 180:1467-74. 2008..Thus, normal CRY control of photoperiod-dependent flowering and hypocotyl growth inhibition requires a functional TFL1 gene... - Maize leaves turn away from neighborsGustavo Angel Maddonni
Departamento de Producción Vegetal, Universidad de Buenos Aires, Avenue San Martín 4453, C1417DSE, Buenos Aires, Argentina
Plant Physiol 130:1181-9. 2002..These observations contradict the current view that phytochrome-mediated responses to low R/FR are a relic from wild conditions, detrimental for crop yield... - Signalling for developmental plasticityJorge J Casal
IFEVA, Faculty of Agronomy, University of Buenos Aires, , 1417-Buenos Aires, Argentina
Trends Plant Sci 9:309-14. 2004 - Multiple dimensions in plant signal transduction: an overviewJorge J Casal
IFEVA, Facultad de Agronomia, Universidad de Buenos Aires y CONICET, Av San Martin 4453, Buenos Aires, 1417, Argentina
Methods Mol Biol 479:1-16. 2009..Here we provide an overview of this multiplicity and its functional significance... - Balancing forces in the photoperiodic control of floweringSabrina E Sanchez
IFEVA, Facultad de Agronomia, Universidad de Buenos Aires and Consejo Nacional de Investigaciones Científicas y Técnicas, Av San Martin 4453, 1417, Buenos Aires, Argentina
Photochem Photobiol Sci 10:451-60. 2011..We propose that fine tuning of flowering time depends on the balance of a hierarchy of multiple points of action of photoperiod on the network controlling flowering... - A growth regulatory loop that provides homeostasis to phytochrome a signalingPatricia Lariguet
Department of Molecular Biology, 1211 Geneve 4, Switzerland
Plant Cell 15:2966-78. 2003..In accordance with this idea, PKS1 effects are larger in the pks2 background (and vice versa). Moreover, the two proteins can interact with each other, and PKS2 negatively regulates PKS1 protein levels specifically under VLFR conditions... - SPA1, a component of phytochrome A signal transduction, regulates the light signaling currentRosalinde-Louise Baumgardt
Department of Plant Developmental and Molecular Biology, , Geb. 26.03.02, Germany
Planta 215:745-53. 2002..spa1 mutations also enhanced the HIRs of anthocyanin accumulation and of phyA-mediated responsivity amplification towards phyB. Thus, our results suggest that spa1 mutations amplify both the phyA-mediated VLFR and the HIR... - Functional and biochemical analysis of the N-terminal domain of phytochrome AJulieta L Mateos
, Postfach 101356, , Germany
J Biol Chem 281:34421-9. 2006..Taken together, these studies highlight the role of the N-terminal domain of phyA in signaling and of distant residues of the GAF subdomain in the regulation of phytochrome bilin-lyase activity... - FHY1 mediates nuclear import of the light-activated phytochrome A photoreceptorThierry Genoud
Centre for Integrative Genomics, University of Lausanne, Lausanne, Switzerland
PLoS Genet 4:e1000143. 2008..Our data suggest that the mechanism uncovered in Arabidopsis is conserved in higher plants. Moreover, this mechanism allows us to propose a model explaining why phyA needs a specific nuclear import pathway... - Mapping quantitative trait loci in multiple populations of Arabidopsis thaliana identifies natural allelic variation for trichome densityV Vaughan Symonds
Section of Molecular, Cell and Developmental Biology, Institute for Cellular and Molecular Biology, University of Texas, 78712, USA
Genetics 169:1649-58. 2005..More generally, these findings suggest that the use of multiple populations holds great promise for better understanding the genetic architecture of natural variation... - Phytochrome control of the Arabidopsis transcriptome anticipates seedling exposure to lightMaria Agustina Mazzella
Instituto de Investigaciones en Ingenieria Genetica y Biologia Molecular, 1428 Buenos Aires, Argentina
Plant Cell 17:2507-16. 2005..We propose that, via changes in ABI3 expression, light, perceived mainly by phyB in the seed, generates a downstream transdevelopmental phase signal that preconditions the seedling to its most likely environment... - Phenotypic characterization of a photomorphogenic mutantChristian Fankhauser
Department of Molecular Biology, 30 quai E Ansermet, 1211 Geneve 4, Switzerland
Plant J 39:747-60. 2004..In this paper, we outline the principal and easiest experiments that can be performed to obtain a first indication about the nature of the photobiological defect in a given mutant... - PHYTOCHROME KINASE SUBSTRATE4 modulates phytochrome-mediated control of hypocotyl growth orientationIsabelle Schepens
Center for Integrative Genomics, University of Lausanne, 1015 Lausanne, Switzerland
Plant Physiol 147:661-71. 2008..This hypothesis is supported by the phenotype of PKS4 overexpressers. Together with previous findings, these results indicate that the PKS family plays important functions during light-regulated tropic growth responses...