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Gibberellin and auxin influence the diurnal transcription pattern of photoreceptor genes via CRY1a in tomato

TitoloGibberellin and auxin influence the diurnal transcription pattern of photoreceptor genes via CRY1a in tomato
Tipo di pubblicazioneArticolo su Rivista peer-reviewed
Anno di Pubblicazione2012
AutoriFacella, P., Daddiego L., Giuliano Giovanni, and Perrotta Gaetano
RivistaPLoS ONE
Volume7
ISSN19326203
Parole chiavearticle, Auxin, circadian rhythm, controlled study, CRY1a gene, cry1a protein, cry1b protein, Cryptochrome, cryptochrome 2, Cryptochromes, down regulation, drug effect, gene, Gene expression, gene expression profiling, gene expression regulation, genetic transcription, genetics, germination, gibberellin, Gibberellins, indoleacetic acid derivative, Indoleacetic Acids, Lycopersicon esculentum, molecular mechanics, mutation, nonhuman, oscillation, photoreceptor, Photoreceptors, Phytochrome, phytohormone, Plant, Plant development, plant growth, Plant Growth Regulators, Reverse Transcriptase Polymerase Chain Reaction, reverse transcription polymerase chain reaction, Seedling, Solanum, stem elongation, Tomato, unclassified drug, vegetable protein, visual proteins and pigments
Abstract

Background: Plant photoreceptors, phytochromes and cryptochromes, regulate many aspects of development and growth, such as seed germination, stem elongation, seedling de-etiolation, cotyledon opening, flower induction and circadian rhythms. There are several pieces of evidence of interaction between photoreceptors and phyto-hormones in all of these physiological processes, but little is known about molecular and genetic mechanisms underlying hormone-photoreceptor crosstalk. Methodology/Principal Findings: In this work, we investigated the molecular effects of exogenous phyto-hormones to photoreceptor gene transcripts of tomato wt, as well as transgenic and mutant lines with altered cryptochromes, by monitoring day/night transcript oscillations. GA and auxin alter the diurnal expression level of different photoreceptor genes in tomato, especially in mutants that lack a working form of cryptochrome 1a: in those mutants the expression of some (IAA) or most (GA) photoreceptor genes is down regulated by these hormones. Conclusions/Significance: Our results highlight the presence of molecular relationships among cryptochrome 1a protein, hormones, and photoreceptors' gene expression in tomato, suggesting that manipulation of cryptochromes could represent a good strategy to understand in greater depth the role of phyto-hormones in the plant photoperceptive mechanism. © 2012 Facella et al.

Note

cited By 13

URLhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-84855841577&doi=10.1371%2fjournal.pone.0030121&partnerID=40&md5=c5fb1a21d8c72a867e98a83095a82cbd
DOI10.1371/journal.pone.0030121
Citation KeyFacella2012