Comparative transcriptomic analysis of resistant and susceptible alfalfa cultivars (Medicago sativa L.) after thrips infestation

文献类型: 外文期刊

第一作者: Zhang, Zehua

作者: Zhang, Zehua;Liu, Zhongkuan

作者机构:

关键词: alfalfa cultivar resistance;thrips;transcriptomic;molecular mechanism

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: 2018 年 19 卷

页码:

收录情况: SCI

摘要: Background: Plant breeding for resistance to agricultural pests is an essential element in the development of integrated crop management systems; however, the molecular and genetic mechanisms underlying resistance are poorly understood. In this pilot study, a transcriptomic analysis of a resistant (R) vs. a susceptible (S) variety of alfalfa, with (+T) or without (-T) thrips (= 4 treatments) was conducted, 'GN-1' (China) was defined as the resistant cultivar, and 'WL323' (America) was defined as the susceptible cultivar. Results: A total of 970 mRNAs were differentially expressed, of which 129 up-and 191 down-regulated genes were identified in the R + T/R-T plants, while 413 up-and 237 down-regulated genes were identified in the S + T/S-T plants. KEGG analysis mapped 33 and 80 differentially expressed genes to 11 and 14 substantially enriched pathways for GN-1 and WL323, respectively. Five shared pathways were linked to plant resistance traits, including beta-Alanine metabolism, fatty acid degradation, chloroalkane and chloroalkene degradation, flavonoid biosynthesis, and phenylalanine metabolism. Conclusions: Results indicated both thrips resistant and susceptible alfalfa cultivars can regulate gene expression in the salicylic acid (SA) and flavonoid biosynthesis pathways to induce defensive genes and protein expression (e.g. polyphenol oxidase, protease inhibitor), which enhances plant defence capacity.

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