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Two Cassava Basic Leucine Zipper (bZIP) Transcription Factors (MebZIP3 and MebZIP5) Confer Disease Resistance against Cassava Bacterial Blight

文献类型： 外文期刊

作者： Li, Xiaolin 1 ; Fan, Shuhong 1 ; Hu, Wei; Liu, Guoyin 1 ; Wei, Yunxie 1 ; He, Chaozu 1 ; Shi, Haitao 1 ;

作者机构： 1.Hainan Univ, Hainan Key Lab Sustainable Utilizat Trop Bioresou, Haikou, Hainan, Peoples R China

2.Hainan Univ, Coll Biol, Inst Trop Agr & Forestry, Haikou, Hainan, Peoples R China

3.Hainan Univ, Coll Biol, Ins

关键词： basic leucine zipper (bZIP) transcription factor;cassava (Manihot esculenta);cassava bacterial blight;disease resistance;virus-induced gene silencing (VIGS)

期刊名称：FRONTIERS IN PLANT SCIENCE （ 影响因子：5.753； 五年影响因子：6.612 ）

ISSN： 1664-462X

年卷期： 2017 年 8 卷

页码：

收录情况： SCI

摘要： Basic domain-leucine zipper (bZIP) transcription factor, one type of conserved gene family, plays an important role in plant development and stress responses. Although 77 MebZIPs have been genome-wide identified in cassava, their in vivo roles remain unknown. In this study, we analyzed the expression pattern and the function of two MebZIPs (MebZIP3 and MebZIP5) in response to pathogen infection. Gene expression analysis indicated that MebZIP3 and MebZIP5 were commonly regulated by flg22, Xanthomonas axonopodis pv. manihotis (Xam), salicylic acid (SA), and hydrogen peroxide (H2O2). Subcellular localization analysis showed that MebZIP3 and MebZIP5 are specifically located in cell nucleus. Through overexpression in tobacco, we found that MebZIP3 and MebZIP5 conferred improved disease resistance against cassava bacterial blight, with more callose depositions. On the contrary, MebZIP3- and MebZIP5-silenced plants by virus-induced gene silencing (VIGS) showed disease sensitive phenotype, lower transcript levels of defense-related genes and less callose depositions. Taken together, this study highlights the positive role of MebZIP3 and MebZIP5 in disease resistance against cassava bacterial blight for further utilization in genetic improvement of cassava disease resistance.

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