Stress-induced early flowering is mediated by miR169 in Arabidopsis thaliana

Plants interact with their environment and they often flower earlier under stress conditions, but how such stress-induced flowering is regulated remains poorly understood. Here evidence is presented that the miR169 family plays a key role in stress-induced flowering in plants. The microRNA (miRNA) m...

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Bibliographische Detailangaben
Veröffentlicht in:	Journal of experimental botany. - 1985. - 65(2014), 1 vom: 13. Jan., Seite 89-101
1. Verfasser:	Xu, Miao Yun (VerfasserIn)
Weitere Verfasser:	Zhang, Lan, Li, Wei Wei, Hu, Xiao Long, Wang, Ming-Bo, Fan, Yun Liu, Zhang, Chun Yi, Wang, Lei
Format:	Online-Aufsatz
Sprache:	English
Veröffentlicht:	2014
Zugriff auf das übergeordnete Werk:	Journal of experimental botany
Schlagworte:	Journal Article Research Support, Non-U.S. Gov't FLC NF-YA family. flowering miR169 microRNA stress Arabidopsis Proteins CCAAT-Binding Factor mehr... FLF protein, Arabidopsis MADS Domain Proteins MIRN169 microRNA, Arabidopsis MicroRNAs NF-YA2 protein, Arabidopsis RNA, Plant Transcription Factors

Beschreibung
Zusammenfassung:	Plants interact with their environment and they often flower earlier under stress conditions, but how such stress-induced flowering is regulated remains poorly understood. Here evidence is presented that the miR169 family plays a key role in stress-induced flowering in plants. The microRNA (miRNA) miR169 family members are up-regulated in Arabidopsis, maize, and soybean under abiotic stresses. Overexpression of miR169d in Arabidopsis results in early flowering, and overexpression of the miR169d target gene, AtNF-YA2, especially a miR169d-resistant version of AtNF-YA2, results in late flowering. The results suggest that the miR169 family regulates stress-induced flowering by repressing the AtNF-YA transcription factor, which in turn reduces the expression of FLOWERING LOCUS C (FLC), allowing for the expression of FLC target genes such as FLOWERING LOCUS T (FT) and LEAFY (LFY) to promote flowering. It was shown that the expression of genes or miRNAs involved in the other flowering pathways, namely the photoperiod (CO), ambient temperature (SVP), ageing (miR156), and gibberelin (SOC1) pathways, was not affected in miR169d-overexpressing plants, suggesting that stress-induced early flowering is a novel signalling pathway mediated by miR169
Beschreibung:	Date Completed 26.09.2014 Date Revised 08.04.2022 published: Print-Electronic Citation Status MEDLINE
ISSN:	1460-2431
DOI:	10.1093/jxb/ert353