An atypical R2R3 MYB transcription factor increases cold hardiness by CBF-dependent and CBF-independent pathways in apple

Bibliographische Detailangaben
Veröffentlicht in:	The New phytologist. - 1979. - 218(2018), 1 vom: 15. Apr., Seite 201-218
1. Verfasser:	Xie, Yinpeng (VerfasserIn)
Weitere Verfasser:	Chen, Pengxiang, Yan, Yan, Bao, Chana, Li, Xuewei, Wang, Liping, Shen, Xiaoxia, Li, Haiyan, Liu, Xiaofang, Niu, Chundong, Zhu, Chen, Fang, Nan, Shao, Yun, Zhao, Tao, Yu, Jiantao, Zhu, Jianhua, Xu, Lingfei, van Nocker, Steven, Ma, Fengwang, Guan, Qingmei
Format:	Online-Aufsatz
Sprache:	English
Veröffentlicht:	2018
Zugriff auf das übergeordnete Werk:	The New phytologist
Schlagworte:	Journal Article Research Support, Non-U.S. Gov't C-REPEAT BINDING FACTOR (CBF) MdMYB124 MdMYB88 apple (Malus × domestica) cold hardiness Anthocyanins Free Radical Scavengers Plant Proteins mehr... RNA, Messenger Transcription Factors Hydrogen Peroxide BBX060AN9V

Beschreibung
Zusammenfassung:	© 2017 Northwest A&F University New Phytologist © 2017 New Phytologist Trust. Apple (Malus × domestica) trees are vulnerable to freezing temperatures. However, there has been only limited success in developing cold-hardy cultivars. This lack of progress is due at least partly to lack of understanding of the molecular mechanisms of freezing tolerance in apple. In this study, we evaluated the potential roles for two R2R3 MYB transcription factors (TFs), MYB88 and the paralogous FLP (MYB124), in cold stress in apple and Arabidopsis. We found that MYB88 and MYB124 positively regulate freezing tolerance and cold-responsive gene expression in both apple and Arabidopsis. Chromatin-Immunoprecipitation-qPCR and electrophoretic mobility shift assays showed that MdMYB88/MdMYB124 act as direct regulators of the COLD SHOCK DOMAIN PROTEIN 3 (MdCSP3) and CIRCADIAN CLOCK ASSOCIATED 1 (MdCCA1) genes. Dual luciferase reporter assay indicated that MdCCA1 but not MdCSP3 activated the expression of MdCBF3 under cold stress. Moreover, MdMYB88 and MdMYB124 promoted anthocyanin accumulation and H2 O2 detoxification in response to cold. Taken together, our results suggest that MdMYB88 and MdMYB124 positively regulate cold hardiness and cold-responsive gene expression under cold stress by C-REPEAT BINDING FACTOR (CBF)-dependent and CBF-independent pathways
Beschreibung:	Date Completed 27.09.2019 Date Revised 30.09.2020 published: Print-Electronic GENBANK: KY569647, KY569648, XP_008377096, ART85558, NP_001315892, XP_008343467 Citation Status MEDLINE
ISSN:	1469-8137
DOI:	10.1111/nph.14952