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Genome-wide characterization of a SRO gene family involved in response to biotic and abiotic stresses in banana (Musa spp.)

文献类型： 外文期刊

作者： Zhang, Lu 1 ; Zhou, Dengbo 3 ; Hu, Huigang 4 ; Li, Weiming 4 ; Hu, Yulin 4 ; Xie, Jianghui 3 ; Huang, Shangzhi 1 ; Wang, 1 ;

作者机构： 1.Sun Yat Sen Univ, Sch Life Sci, State Key Lab Biocontrol, Guangzhou 510006, Guangdong, Peoples R China

2.Sun Yat Sen Univ, Sch Life Sci, Guangdong Key Lab Plant Resources, Guangzhou 510006, Guangdong, Peoples R China

3.Chinese Acad Trop Agr Sci, Inst Trop Biosci & Biotechnol, Haikou 571101, Hainan, Peoples R China

4.Chinese Acad Trop Agr Sci, Key Lab Trop Crop Biotechnol, Minist Agr, Inst China Southern Subtrop Crop Res, Zhanjiang 524091, Peoples R China

5.Sun Yat Sen Univ, Sch Life Sci, Guangzhou 510275, Guangdong, Peoples R China

关键词： SRO family; Banana; Induced expression; Abiotic stress; Biotic stress; hormone treatment; Protein interaction

期刊名称：BMC PLANT BIOLOGY （ 影响因子：4.215； 五年影响因子：4.96 ）

ISSN： 1471-2229

年卷期： 2019 年 19 卷

页码：

收录情况： SCI

摘要： BackgroundBanana (Musa spp.) is one of the world's most important fruits and its production is largely limited by diverse stress conditions. SROs (SIMILAR TO RCD-ONE) have important functions in abiotic stress resistance and development of plants. They contain a catalytic core of the poly(ADP-ribose) polymerase (PARP) domain and a C-terminal RST (RCD-SRO-TAF4) domain. In addition, partial SROs also include an N-terminal WWE domain. Although a few of SROs have been characterized in some model plants, little is known about their functions in banana, especially in response to biotic stress.ResultsSix MaSRO genes in banana genome were identified using the PARP and RST models as a query. Phylogenetic analysis showed that 77 SROs from 15 species were divided into two structurally distinct groups. The SROs in the group I possessed three central regions of the WWE, PARP and RST domains. The WWE domain was lacking in the group II SROs. In the selected monocots, only MaSROs of banana were present in the group II. Most of MaSROs expressed in more than one banana tissue. The stress- and hormone-related cis-regulatory elements (CREs) in the promoter regions of MaSROs supported differential transcripts of MaSROs in banana roots treated with abiotic and biotic stresses. Moreover, expression profiles of MaSROs in the group I were clearly distinct with those observed in the group II after hormone treatment. Notably, the expression of MaSRO4 was significantly upregulated by the multiple stresses and hormones. The MaSRO4 protein could directly interact with MaNAC6 and MaMYB4, and the PARP domain was required for the protein-protein interaction.ConclusionsSix MaSROs in banana genome were divided into two main groups based on the characteristics of conserved domains. Comprehensive expression analysis indicated that MaSROs had positive responses to biotic and abiotic stresses via a complex interaction network with hormones. MaSRO4 could interact directly with MaNAC6 and MaMYB4 through the PARP domain to regulate downstream signaling pathway.

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