Deregulation of ζ‐carotene desaturase in Arabidopsis and tomato exposes a unique carotenoid‐derived redundant regulation of floral meristem identity and function
Deregulation of ζ‐carotene desaturase in Arabidopsis and tomato exposes a unique carotenoid‐derived redundant regulation of floral meristem identity and function
复制标题
拟南芥和番茄中γ-胡萝卜素去饱和酶的失调暴露了一种独特的类胡萝卜素衍生的花分生组织特性和功能的冗余调节
DOI：
10.1111/tpj.16168
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发表时间：
2023
期刊：
影响因子：
--
通讯作者：
León, Patricia
中科院分区：
文献类型：
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作者：
McQuinn, Ryan P.;Leroux, Julie;Sierra, Julio;Escobar‐Tovar, Lina;Frusciante, Sarah;Finnegan, E. Jean;Diretto, Gianfranco;Giuliano, Giovanni;Giovannoni, James J.;León, Patricia
花发育的转录调节因子之间的冗余和相互作用水平保障了植物的繁殖成功并确保作物产量。在本研究中，阐明了花分生组织（FM）的身份和花发育的调节中的额外的一层复杂性，将类胡萝卜素的生物合成和代谢与有限开花的调节联系起来。拟南芥叶绿体生物发生5（clb 5）突变体中多种β-胡萝卜素的积累和随后的切割导致分生组织基因调控网络的重编程，建立FM身份，反映FM身份主调节因子APETALA 1（AP 1）。clb 5的花器官发育需要长的光周期，而AP 1对clb 5的花器官发育至关重要。类胡萝卜素代谢和花发育之间的这种联系的阐明转化为番茄暴露的FM身份冗余的调节和启动AP 1，并提出依赖于E类花的启动和器官身份调节，SEPALLATA 3（SEP 3）。
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 thechloroplast 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 inclb5requires long photoperiods in a GIGANTEA‐independent manner, whereas AP1 is essential for the floral organ development ofclb5. 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).