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Pea VEGETATIVE2 is an FD homolog that is essential for flowering and compound inflorescence development
journal contribution
posted on 2023-05-18, 11:48 authored by Frances SussmilchFrances Sussmilch, Berbel, A, Valerie HechtValerie Hecht, Jacqueline Vander SchoorJacqueline Vander Schoor, Ferrandiz, C, Madueno, F, James WellerJames WellerAs knowledge of the gene networks regulating inflorescence development in Arabidopsis thaliana improves, the current challenge is to characterize this system in different groups of crop species with different inflorescence architecture. Pea (Pisum sativum) has served as a model for development of the compound raceme, characteristic of many legume species, and in this study, we characterize the pea VEGETATIVE2 (VEG2) locus, showing that it is critical for regulation of flowering and inflorescence development and identifying it as a homolog of the bZIP transcription factor FD. Through detailed phenotypic characterizations of veg2 mutants, expression analyses, and the use of protein-protein interaction assays, we find that VEG2 has important roles during each stage of development of the pea compound inflorescence. Our results suggest that VEG2 acts in conjunction with multiple FLOWERING LOCUS T (FT) proteins to regulate expression of downstream target genes, including TERMINAL FLOWER1, LEAFY, and MADS box homologs, and to facilitate cross-regulation within the FT gene family. These findings further extend our understanding of the mechanisms underlying compound inflorescence development in pea and may have wider implications for future manipulation of inflorescence architecture in related legume crop species.
History
Publication title
Plant CellVolume
27Issue
4Pagination
1046-1060ISSN
1040-4651Department/School
School of Natural SciencesPublisher
Amer Soc Plant BiologistsPlace of publication
15501 Monona Drive, Rockville, USA, Md, 20855Rights statement
Copyright 2015 American Society of Plant BiologistsRepository Status
- Restricted