Transcriptome Analyses in Different Cucumber Cultivars Provide Novel Insights into Drought Stress Responses
文献类型： 外文期刊
作者： Wang, Min 1 ; Jiang, Biao 1 ; Peng, Qingwu 1 ; Liu, Wenrui 1 ; He, Xiaoming 1 ; Liang, Zhaojun 1 ; Lin, Yu'e 1 ;
作者机构： 1.Guangdong Acad Agr Sci, Vegetable Res Inst, Guangzhou 510640, Guangdong, Peoples R China
2.Guangdong Key Lab New Technol Res Vegetables, Guangzhou 510640, Guangdong, Peoples R China
关键词： Cucumis sativus L.; RNA-Seq; DEGs; sucrose; ABA; drought stress
期刊名称：INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES （ 影响因子：5.923； 五年影响因子：6.132 ）
ISSN： 1422-0067
年卷期： 2018 年 19 卷 7 期
页码：
收录情况： SCI
摘要： Drought stress is one of the most serious threats to cucumber quality and yield. To gain a good understanding of the molecular mechanism upon water deficiency, we compared and analyzed the RNA sequencing-based transcriptomic responses of two contrasting cucumber genotypes, L-9 (drought-tolerant) and A-16 (drought-sensitive). In our present study, combining the analysis of phenotype, twelve samples of cucumber were carried out a transcriptomic profile by RNA-Seq under normal and water-deficiency conditions, respectively. A total of 1008 transcripts were differentially expressed under normal conditions (466 up-regulated and 542 down-regulated) and 2265 transcripts under drought stress (979 up-regulated and 1286 down-regulated). The significant positive correlation between RNA sequencing data and a qRT-PCR analysis supported the results found. Differentially expressed genes (DEGs) involved in metabolic pathway and biosynthesis of secondary metabolism were significantly changed after drought stress. Several genes, which were related to sucrose biosynthesis (Csa3G784370 and Csa3G149890) and abscisic acid (ABA) signal transduction (Csa4M361820 and Csa6M382950), were specifically induced after 4 days of drought stress. DEGs between the two contrasting cultivars identified in our study provide a novel insight into isolating helpful candidate genes for drought tolerance in cucumber.
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