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Genome-wide identification and expression profiling of DREB genes in Saccharum spontaneum

文献类型： 外文期刊

作者： Li, Zhen 1 ; Wang, Gang 2 ; Liu, Xihui 3 ; Wang, Zhengchao 4 ; Zhang, Muqing 5 ; Zhang, Jisen 1 ;

作者机构： 1.Fujian Agr & Forestry Univ, Coll Agr, Fujian Prov Key Lab Haixia Appl Plant Syst Biol, Fuzhou 350002, Peoples R China

2.Yancheng Teachers Univ, Jiangsu Synthet Innovat Ctr Coastal Bioagr, Jiangsu Prov Key Lab Coastal Wetland Bioresources, Jiangsu Key Lab Bioresources Saline Soils, Yancheng 224051, Peoples R China

3.Guangxi Acad Agr Sci, Sugarcane Res Inst, Nanning 530007, Peoples R China

4.Fujian Normal Univ, Coll Life Sci, Provincial Key Lab Dev Biol & Neurosci, Fuzhou 350007, Peoples R China

5.Guangxi Univ, Guangxi Key Lab Sugarcane Biol, Nanning 530004, Peoples R China

关键词： Saccharum spontaneum; DREB; Phylogenetic analysis; Gene expression; Dehydration response

期刊名称：BMC GENOMICS （ 影响因子：3.969； 五年影响因子：4.478 ）

ISSN： 1471-2164

年卷期： 2021 年 22 卷 1 期

页码：

收录情况： SCI

摘要： Background The dehydration-responsive element-binding proteins (DREBs) are important transcription factors that interact with a DRE/CRT (C-repeat) sequence and involve in response to multiple abiotic stresses in plants. Modern sugarcane are hybrids from the cross between Saccharum spontaneum and Saccharum officinarum, and the high sugar content is considered to the attribution of S. officinaurm, while the stress tolerance is attributed to S. spontaneum. To understand the molecular and evolutionary characterization and gene functions of the DREBs in sugarcane, based on the recent availability of the whole genome information, the present study performed a genome-wide in silico analysis of DREB genes and transcriptome analysis in the polyploidy S. spontaneum. Results Twelve DREB1 genes and six DREB2 genes were identified in S. spontaneum genome and all proteins contained a conserved AP2/ERF domain. Eleven SsDREB1 allele genes were assumed to be originated from tandem duplications, and two of them may be derived after the split of S. spontaneum and the proximal diploid species sorghum, suggesting tandem duplication contributed to the expansion of DREB1-type genes in sugarcane. Phylogenetic analysis revealed that one DREB2 gene was lost during the evolution of sugarcane. Expression profiling showed different SsDREB genes with variable expression levels in the different tissues, indicating seven SsDREB genes were likely involved in the development and photosynthesis of S. spontaneum. Furthermore, SsDREB1F, SsDREB1L, SsDREB2D, and SsDREB2F were up-regulated under drought and cold condition, suggesting that these four genes may be involved in both dehydration and cold response in sugarcane. Conclusions These findings demonstrated the important role of DREBs not only in the stress response, but also in the development and photosynthesis of S. spontaneum.

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