Gibberellin and auxin influence the diurnal transcription pattern of photoreceptor genes via CRY1a in tomato.
| Autor: | Facella P; Italian National Agency for New Technologues, Energy and Sustainable Economic Development (ENA), Trisaia Research Center, Rotondella, Italy., Daddiego L, Giuliano G, Perrotta G |
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| Jazyk: | angličtina |
| Zdroj: | PloS one [PLoS One] 2012; Vol. 7 (1), pp. e30121. Date of Electronic Publication: 2012 Jan 17. |
| DOI: | 10.1371/journal.pone.0030121 |
| Abstrakt: | 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. |
| Databáze: | MEDLINE |
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