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• W2090989521 endingPage "e1001388" @default.
• W2090989521 startingPage "e1001388" @default.
• W2090989521 abstract "Floral organs display tremendous variation in their exterior that is essential for organogenesis and the interaction with the environment. This diversity in surface characteristics is largely dependent on the composition and structure of their coating cuticular layer. To date, mechanisms of flower organ initiation and identity have been studied extensively, while little is known regarding the regulation of flower organs surface formation, cuticle composition, and its developmental significance. Using a synthetic microRNA approach to simultaneously silence the three SHINE (SHN) clade members, we revealed that these transcription factors act redundantly to shape the surface and morphology of Arabidopsis flowers. It appears that SHNs regulate floral organs' epidermal cell elongation and decoration with nanoridges, particularly in petals. Reduced activity of SHN transcription factors results in floral organs' fusion and earlier abscission that is accompanied by a decrease in cutin load and modified cell wall properties. SHN transcription factors possess target genes within four cutin- and suberin-associated protein families including, CYP86A cytochrome P450s, fatty acyl-CoA reductases, GSDL-motif lipases, and BODYGUARD1-like proteins. The results suggest that alongside controlling cuticular lipids metabolism, SHNs act to modify the epidermis cell wall through altering pectin metabolism and structural proteins. We also provide evidence that surface formation in petals and other floral organs during their growth and elongation or in abscission and dehiscence through SHNs is partially mediated by gibberellin and the DELLA signaling cascade. This study therefore demonstrates the need for a defined composition and structure of the cuticle and cell wall in order to form the archetypal features of floral organs surfaces and control their cell-to-cell separation processes. Furthermore, it will promote future investigation into the relation between the regulation of organ surface patterning and the broader control of flower development and biological functions." @default.
• W2090989521 created "2016-06-24" @default.
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• W2090989521 date "2011-05-26" @default.
• W2090989521 modified "2023-10-15" @default.
• W2090989521 title "SHINE Transcription Factors Act Redundantly to Pattern the Archetypal Surface of Arabidopsis Flower Organs" @default.
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• W2090989521 doi "https://doi.org/10.1371/journal.pgen.1001388" @default.
• W2090989521 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3102738" @default.
• W2090989521 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/21637781" @default.
• W2090989521 hasPublicationYear "2011" @default.
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