Different Functions of IbRAP2.4, a Drought-Responsive AP2/ERF Transcription Factor, in Regulating Root Development Between Arabidopsis and Sweetpotato
文献类型： 外文期刊
作者： Bian, Xiaofeng 1 ; Kim, Ho Soo 2 ; Kwak, Sang-Soo 2 ; Zhang, Qian 1 ; Liu, Shuai 1 ; Ma, Peiyong 1 ; Jia, Zhaodong 1 ; Xie, Yizhi 1 ; Zhang, Peng 3 ; Yu, Yang 1 ;
作者机构： 1.Jiangsu Acad Agr Sci, Prov Key Lab Agrobiol, Inst Food Crops, Nanjing, Peoples R China
2.Korea Res Inst Biosci & Biotechnol KRIBB, Plant Syst Engn Res Ctr, Daejeon, South Korea
3.Chinese Acad Sci, Inst Plant Physiol & Ecol, CAS Ctr Excellence Mol Plant Sci, Natl Key Lab Plant Mol Genet, Shanghai, Peoples R China
关键词： sweetpotato (Ipomoea batatas (L; ) Lam); Arabidopsis; AP2; ERF; lateral root; storage root; DRE element; GCC-box
期刊名称：FRONTIERS IN PLANT SCIENCE （ 影响因子：6.627； 五年影响因子：7.255 ）
ISSN： 1664-462X
年卷期： 2022 年 13 卷
页码：
收录情况： SCI
摘要： Plant root systems are essential for the uptake of water and nutrients from soil and are positively correlated to yield in many crops including the sweetpotato, Ipomoea batatas (L.) Lam. Here, we isolated and functionally characterized IbRAP2.4, a novel nuclear-localized gene encoding the AP2/ERF transcription factor, from sweetpotato. IbRAP2.4 was responsive to NaCl, PEG8000, ethylene, and Indole 3-acetic acid treatments. As revealed by electrophoretic mobility shift assay and dual luciferase assay, IbRAP2.4 could bind to both DRE and GCC-box elements and acted as a transcription activator. IbRAP2.4 overexpression significantly promoted lateral root formation and enhanced the drought tolerance in Arabidopsis thaliana, while it inhibited storage root formation in transgenic sweetpotato by comprehensively upregulating lignin biosynthesis pathway genes. Results suggested that IbRAP2.4 may be a useful potential target for further molecular breeding of high yielding sweetpotato.
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