Dorsoventrally asymmetric expression of miR319/TCP generates dorsal-specific venation patterning in petunia corolla tube

© The Author(s) 2024. Published by Oxford University Press on behalf of the Society for Experimental Biology. All rights reserved. For commercial re-use, please contact reprintsoup.com for reprints and translation rights for reprints. All other permissions can be obtained through our RightsLink serv...

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Veröffentlicht in:Journal of experimental botany. - 1985. - 75(2024), 11 vom: 07. Juni, Seite 3401-3411
1. Verfasser: Zhang, Bin (VerfasserIn)
Weitere Verfasser: Qin, Xiaoting, Han, Yao, Li, Mingyang, Guo, Yulong
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2024
Zugriff auf das übergeordnete Werk:Journal of experimental botany
Schlagworte:Journal Article Anthocyanin CIN-TCP asymmetric pigmentation pattern miRNA319 petunia venation patterning MicroRNAs Plant Proteins
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Zusammenfassung:© The Author(s) 2024. Published by Oxford University Press on behalf of the Society for Experimental Biology. All rights reserved. For commercial re-use, please contact reprintsoup.com for reprints and translation rights for reprints. All other permissions can be obtained through our RightsLink service via the Permissions link on the article page on our site—for further information please contact journals.permissions@oup.com.
Vein-associated pigmentation (venation) is a type of floral coloration adopted by plants to attract pollinators. Several petunia (Petunia hybrida) lines generate dorsoventrally asymmetric venation patterning of the corolla tube, in which venation is only present in the dorsal tube. The molecular mechanism underlying this trait is unknown. Here, we demonstrate that miR319 is preferentially expressed in the dorsal corolla tube, leading to dorsoventrally asymmetric expression of its target genes. Transgenic lines overexpressing phy-miR319a generated uniform venation patterning of the corolla tube. Knockout of TCP genes targeted by miR319 promoted venation patterning in the ventral and dorsal tube, while overexpression of the miR319 target gene, PhTCP6, completely inhibited corolla tube venation patterning. In addition, miR319-targeted TCPs negatively regulated venation patterning, probably by repressing the regulator of venation patterning, AN4. Together, our data demonstrate that asymmetric expression of miR319 promotes venation patterning in the petunia dorsal tube alone by repressing the expression of its target TCP genes, which negatively regulate corolla tube venation patterning. These findings provide novel insights into how the dorsoventrally asymmetric distribution of venation patterning is established in zygomorphic flowers
Beschreibung:Date Completed 07.06.2024
Date Revised 22.10.2024
published: Print
Citation Status MEDLINE
ISSN:1460-2431
DOI:10.1093/jxb/erae127