A transcriptional complex of NGATHA and bHLH transcription factors directs stigma development in Arabidopsis.
Journal
The Plant cell
ISSN: 1532-298X
Titre abrégé: Plant Cell
Pays: England
ID NLM: 9208688
Informations de publication
Date de publication:
03 12 2021
03 12 2021
Historique:
received:
27
05
2020
accepted:
17
09
2021
pubmed:
30
9
2021
medline:
6
1
2022
entrez:
29
9
2021
Statut:
ppublish
Résumé
The stigma is an angiosperm-specific tissue that is essential for pollination. In the last two decades, several transcription factors with key roles in stigma development in Arabidopsis thaliana have been identified. However, genetic analyses have thus far been unable to unravel the precise regulatory interactions among these transcription factors or the molecular basis for their selective roles in different spatial and temporal domains. Here, we show that the NGATHA (NGA) and HECATE (HEC) transcription factors, which are involved in different developmental processes but are both essential for stigma development, require each other to perform this function. This relationship is likely mediated by their physical interaction in the apical gynoecium. NGA/HEC transcription factors subsequently upregulate INDEHISCENT (IND) and SPATULA and are indispensable for the binding of IND to some of its targets to allow stigma differentiation. Our findings support a nonhierarchical regulatory scenario in which the combinatorial action of different transcription factors provides exquisite temporal and spatial specificity of their developmental outputs.
Identifiants
pubmed: 34586419
pii: 6377794
doi: 10.1093/plcell/koab236
pmc: PMC8643694
doi:
Substances chimiques
Arabidopsis Proteins
0
Transcription Factors
0
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
3645-3657Commentaires et corrections
Type : CommentIn
Informations de copyright
© The Author(s) 2021. Published by Oxford University Press on behalf of American Society of Plant Biologists.
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