| Autor: |
Magdalena Rossi, Ricardo Ernesto Bianchetti, Nicolás Bellora, Luisa Bermúdez, Luciano Freschi, Daniele Rosado, Rafael Zuccarelli, de Haro La |
| Rok vydání: |
2020 |
| Předmět: |
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| DOI: |
10.1101/2020.07.30.227447 |
| Popis: |
SummaryPhytochrome-mediated light and temperature perception has been shown to be a major regulator of fruit development. Furthermore, chromatin remodelling via DNA demethylation has been described as a crucial mechanism behind the fruit ripening process; however, the molecular basis underlying the triggering of this epigenetic modification remains largely unknown. Here, through integrative analyses of the methylome, siRNAome and transcriptome of tomato fruits from phyA and phyB1B2 null mutants, we report that PHYB1 and PHYB2 control genome-wide DNA methylation during fruit development from green towards ripe stages. The experimental evidence indicates that PHYB1B2 signal transduction is mediated by a gene expression network involving chromatin organization factors (DNA methylases/demethylases, histone-modifying enzymes and remodelling factors) and transcriptional regulators leading in the altered mRNA profile of photosynthetic and ripening-associated genes. This new level of understanding provides insights into the orchestration of epigenetic mechanisms in response to environmental cues affecting agronomical traits. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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