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Genome-wide characterization and expression analysis enables identification of abiotic stress-responsive MYB transcription factors in cassava (Manihot esculenta)

文献类型： 外文期刊

作者： Ruan, Meng-Bin 2 ; Guo, Xin 3 ; Wang, Bin 3 ; Yang, Yi-Ling 4 ; Li, Wen-Qi 1 ; Yu, Xiao-Ling 1 ; Zhang, Peng 5 ; Peng, Mi 1 ;

作者机构： 1.Chinese Acad Trop Agr Sci, Inst Trop Biosci & Biotechnol, Haikou 571101, Hainan, Peoples R China

2.Minist Agr, Key Lab Biol & Genet Resources Trop Crops, Haikou 571101, Hainan, Peoples R China

3.Huazhong Agr Univ, Wuhan 430070, Hubei, Peoples R China

4.Guangdong Acad Agr Sci, Crops Res Inst, Guangzhou 510640, Guangdong, Peoples R China

5.Chinese Acad Sci, Shanghai Inst Biol Sci, Inst Plant Physiol & Ecol, CAS Ctr Excellence & Mol Plant Sci,Natl Key Lab P, Shanghai 200032, Peoples R

关键词： Cassava (Manihot esculenta);genome-wide identification;MYB transcription factors;stress response

期刊名称：JOURNAL OF EXPERIMENTAL BOTANY （ 影响因子：6.992； 五年影响因子：7.86 ）

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年卷期：

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收录情况： SCI

摘要： The myeloblastosis (MYB) transcription factor superfamily is the largest transcription factor family in plants, playing different roles during stress response. However, abiotic stress-responsive MYB transcription factors have not been systematically studied in cassava (Manihot esculenta), an important tropical tuber root crop. In this study, we used a genome-wide transcriptome analysis to predict 299 putative MeMYB genes in the cassava genome. Under drought and cold stresses, many MeMYB genes exhibited different expression patterns in cassava leaves, indicating that these genes might play a role in abiotic stress responses. We found that several stress-responsive MeMYB genes responded to abscisic acid (ABA) in cassava leaves. We characterize four MeMYBs, namely MeMYB1, MeMYB2, MeMYB4, and MeMYB9, as R2R3-MYB transcription factors. Furthermore, RNAi-driven repression of MeMYB2 resulted in drought and cold tolerance in transgenic cassava. Gene expression assays in wild-type and MeMYB2-RNAi cassava plants revealed that MeMYB2 may affect other MeMYBs as well as MeWRKYs under drought and cold stress, suggesting crosstalk between MYB and WRKY family genes under stress conditions in cassava.

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