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Deregulation of ζ-carotene desaturase in Arabidopsis and tomato exposes a unique carotenoid-derived redundant regulation of floral meristem identity and function

TitleDeregulation of ζ-carotene desaturase in Arabidopsis and tomato exposes a unique carotenoid-derived redundant regulation of floral meristem identity and function
Publication TypeArticolo su Rivista peer-reviewed
Year of Publication2023
AuthorsMcQuinn, R.P., Leroux J., Sierra J., Escobar-Tovar L., Frusciante Sarah, Finnegan E.J., Diretto Gianfranco, Giuliano Giovanni, Giovannoni J.J., León P., and Pogson B.J.
JournalPlant Journal
ISSN09607412
KeywordsApocarotenoids, Arabidopsis thaliana, biochemistry, biosynthesis, Carotenoids, Cultivation, Floral homeotic gene, Floral meristem identity, Floral meristems, Flower development, Frequency modulation, Fruits, Genes, Homeotic genes, Meristem identity, metabolism, Plants (botany), Retrograde signaling, Solanum lycopersicum
Abstract

A level of redundancy and interplay among the transcriptional regulators of floral development safeguards a plant's reproductive success and ensures crop production. In the present study, an additional layer of complexity in the regulation of floral meristem (FM) identity and flower development is elucidated linking carotenoid biosynthesis and metabolism to the regulation of determinate flowering. The accumulation and subsequent cleavage of a diverse array of ζ-carotenes in the chloroplast biogenesis 5 (clb5) mutant of Arabidopsis results in the reprogramming of meristematic gene regulatory networks establishing FM identity mirroring that of the FM identity master regulator, APETALA1 (AP1). The immediate transition to floral development in clb5 requires long photoperiods in a GIGANTEA-independent manner, whereas AP1 is essential for the floral organ development of clb5. The elucidation of this link between carotenoid metabolism and floral development translates to tomato exposing a regulation of FM identity redundant to and initiated by AP1 and proposed to be dependent on the E class floral initiation and organ identity regulator, SEPALLATA3 (SEP3). © 2023 The Authors. The Plant Journal published by Society for Experimental Biology and John Wiley & Sons Ltd.

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URLhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85152054233&doi=10.1111%2ftpj.16168&partnerID=40&md5=888cba58b036285556d6e0695ed99040
DOI10.1111/tpj.16168
Citation KeyMcQuinn2023