Local auxin biosynthesis regulates brace root angle and lodging resistance in maize

Local auxin biosynthesis regulates brace root angle and lodging resistance in maize

© 2023 The Authors. New Phytologist © 2023 New Phytologist Foundation.

Détails bibliographiques
Publié dans:The New phytologist. - 1979. - 238(2023), 1 vom: 01. Apr., Seite 142-154
Auteur principal: Zheng, Zhigang (Auteur)
Autres auteurs: Wang, Baobao, Zhuo, Chuyun, Xie, Yurong, Zhang, Xiaoming, Liu, Yanjun, Zhang, Guisen, Ding, Hui, Zhao, Binbin, Tian, Manqing, Xu, Miaoyun, Kong, Dexin, Shen, Rongxin, Liu, Qing, Wu, Guangxia, Huang, Junfei, Wang, Haiyang
Format: Article en ligne
Langue:English
Publié: 2023
Accès à la collection:The New phytologist
Sujets:Journal Article Research Support, Non-U.S. Gov't ZmYUC2/4 auxin biosynthesis lodging resistance maize root angle root gravitropism Indoleacetic Acids
Description
Résumé:© 2023 The Authors. New Phytologist © 2023 New Phytologist Foundation.
Root lodging poses a major threat to maize production, resulting in reduced grain yield and quality, and increased harvest costs. Here, we combined expressional, genetic, and cytological studies to demonstrate a role of ZmYUC2 and ZmYUC4 in regulating gravitropic response of the brace root and lodging resistance in maize. We show that both ZmYUC2 and ZmYUC4 are preferentially expressed in root tips with partially overlapping expression patterns, and the protein products of ZmYUC2 and ZmYUC4 are localized in the cytoplasm and endoplasmic reticulum, respectively. The Zmyuc4 single mutant and Zmyuc2/4 double mutant exhibit enlarged brace root angle compared with the wild-type plants, with larger brace root angle being observed in the Zmyuc2/4 double mutant. Consistently, the brace root tips of the Zmyuc4 single mutant and Zmyuc2/4 double mutant accumulate less auxin and are defective in proper reallocation of auxin in response to gravi-stimuli. Furthermore, we show that the Zmyuc4 single mutant and the Zmyuc2/4 double mutant display obviously enhanced root lodging resistance. Our combined results demonstrate that ZmYUC2- and ZmYUC4-mediated local auxin biosynthesis is required for normal gravity response of the brace roots and provide effective targets for breeding root lodging resistant maize cultivars
Description:Date Completed 06.03.2023
Date Revised 12.04.2023
published: Print-Electronic
Citation Status MEDLINE
ISSN:1469-8137
DOI:10.1111/nph.18733