Abscisic acid homeostasis is mediated by feedback regulation of MdMYB88 and MdMYB124

Abscisic acid homeostasis is mediated by feedback regulation of MdMYB88 and MdMYB124

© The Author(s) 2020. Published by Oxford University Press on behalf of the Society for Experimental Biology. All rights reserved. For permissions, please email: journals.permissionsoup.com.

Bibliographische Detailangaben
Veröffentlicht in:Journal of experimental botany. - 1985. - 72(2021), 2 vom: 02. Feb., Seite 592-607
1. Verfasser: Xie, Yinpeng (VerfasserIn)
Weitere Verfasser: Bao, Chana, Chen, Pengxiang, Cao, Fuguo, Liu, Xiaofang, Geng, Dali, Li, Zhongxing, Li, Xuewei, Hou, Nan, Zhi, Fang, Niu, Chundong, Zhou, Shuangxi, Zhan, Xiangqiang, Ma, Fengwang, Guan, Qingmei
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2021
Zugriff auf das übergeordnete Werk:Journal of experimental botany
Schlagworte:Journal Article Research Support, Non-U.S. Gov't Abscisic acid homeostasis MdMYB88/MdMYB124 apple drought tolerance Plant Proteins Abscisic Acid 72S9A8J5GW
Beschreibung
Zusammenfassung:© The Author(s) 2020. Published by Oxford University Press on behalf of the Society for Experimental Biology. All rights reserved. For permissions, please email: journals.permissionsoup.com.
The phytohormone abscisic acid (ABA) is involved in various plant processes. In response to drought stress, plants quickly accumulate ABA, but the regulatory mechanism of ABA accumulation is largely unknown, especially in woody plants. In this study, we report that MdMYB88 and MdMYB124 are myeloblastosis (MYB) transcription factors critical for ABA accumulation in apple trees (Malus x domestica) following drought, and this regulation is negatively controlled by ABA. MdMYB88 and MdMYB124 positively regulate leaf water transpiration, photosynthetic capacity, and stress endurance in apple trees under drought conditions. MdMYB88 and MdMYB124 regulate the expression of biosynthetic and catabolic genes of ABA, as well as drought- and ABA- responsive genes. MdMYB88 associates with promoter regions of the ABA biosynthetic gene 9-cis-epoxycarotenoid dioxygenase 3 (NCED3). Finally, expression of MdMYB88 and MdMYB124 is repressed by ABA. Our results identify a feedback regulation of MdMYB88 and MdMYB124 in modulating ABA homeostasis in apple trees
Beschreibung:Date Completed 13.05.2021
Date Revised 13.05.2021
published: Print
Citation Status MEDLINE
ISSN:1460-2431
DOI:10.1093/jxb/eraa449