Journal of Integrative Agriculture ›› 2018, Vol. 17 ›› Issue (11): 2518-2527.DOI: 10.1016/S2095-3119(17)61843-4

所属专题: 昆虫和植物互作合辑Insect and Plant Interact

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  • 收稿日期:2017-07-18 出版日期:2018-11-01 发布日期:2018-11-01

Transcriptome approach to understand the potential mechanisms of resistant and susceptible alfalfa (Medicago sativa L.) cultivars in response to aphid feeding

TU Xiong-bing1*, ZHAO Hai-long1, 2*, ZHANG Ze-hua
 
  

  1. 1 State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, P.R.China
    2 College of Plant Protection, Shenyang Agricultural University, Shenyang 110161, P.R.China
  • Received:2017-07-18 Online:2018-11-01 Published:2018-11-01
  • Contact: Correspondence ZHANG Ze-hua, Tel: +86-10-82109585, Fax: +86-10-82109569, E-mail: zhangzehua@caas.cn
  • About author:TU Xiong-bing, E-mail: xbtu@ippcaas.cn; ZHAO Hai-long, E-mail: zhl19930516@163.com; * These authors contributed equally to this study.
  • Supported by:
    This research was funded by the earmarked fund for China Agriculture Research System (CARS-34-07).

Abstract:

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, we conducted a transcriptomic analysis of a resistant (R) and susceptible (S) variety of alfalfa, with (+A) or without (–A) aphids (totally four treatments).  We used the resistant cultivar Zhongmu 1 and the susceptible cultivar Soca.  A total of 3 549 mRNAs were differentially expressed, of which 1 738 up-regulated and 1 307 down-regulated genes were identified in S+A/S–A plants, while 543 up-regulated and 331 down-regulated genes were identified in the R+A/R–A plants.  KEGG analysis mapped 112 and 546 differentially expressed genes to 8 and 17 substantially enriched pathways for Zhongmu 1 and Soca, respectively.  Six shared pathways were linked to plant resistance traits, including phenylpropanoid biosynthesis associated with salicylic acid synthesis, and linoleic acid metabolism associated with both jasmonic acid and flavonoid biosynthesis.  Ultimately, we proposed a preliminary regulatory mechanism of alfalfa cultivar resistance response to aphids feeding based on transcriptome analyses and published documents.
 

Key words: alfalfa cultivar resistance ,  aphids ,  transcriptomic ,  molecular mechanism