Biotechnology Bulletin ›› 2023, Vol. 39 ›› Issue (9): 136-146.doi: 10.13560/j.cnki.biotech.bull.1985.2023-0251

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Construction and Utilization of Yeast Two-hybrid cDNA Library of Wheat Interacted by Puccinia triticina

WEN Xiao-lei1,2(), LI Jian-yuan3, LI Na4, ZHANG Na1, YANG Wen-xiang1()   

  1. 1. Wheat Leaf Rust Research Center, College of Plant Protection, Agricultural University of Hebei, Technological Innovation Center for Biological Control of Plant Diseases and Insect Pests of Hebei Province, National Engineering Research Center for Agriculture in Northern Mountainous Areas, Baoding 071001
    2. College of Agronomy and Biotechnology, Hebei Normal University of Science & Technology, Hebei Key Laboratory of Crop Stress Biology, Qinhuangdao 066000
    3. College of Bioscience and Bioengineering, Xingtai University, Xingtai 054000
    4. Hebei Plant Protection Plant Inspection Station, Shijiazhuang 050000
  • Received:2023-03-21 Online:2023-09-26 Published:2023-10-24
  • Contact: YANG Wen-xiang E-mail:xiaoleiwen@sina.com;wenxiangyang2003@163.com

Abstract:

In order to screen the target proteins interacting with effector proteins of the wheat leaf rust and to lay a foundation for dissecting the defense response mechanism of the effector proteins interfering with hosts and disease resistance breeding, the samples of interaction between the isolate13-5-28-1(JHKT)and susceptible wheat variety Thatcher at 0-12 d were collected. The three-frame homogenization was constructed by SMART method to screen the wheat cDNA library interacting with the wheat leaf rust. The homologous recombination method was used to construct the recombinant bait vector pGBKT7-Pt34084 of the effector factor Pt34084, and it was used as the bait protein to screen the interaction target protein by co-transformation method. The results showed that the cDNA library structure of the interaction between the wheat leaf rust and wheat was successfully constructed. The library capacity was about 1.05×107 CFU/mL, the titer was 1.2×109 CFU/mL, the average insertion fragment was more than 1 kb, and the recombination positive rate was 100%. The cDNA library met the requirement. The constructed bait recombinant vector pGBKT7-Pt34084 inhibited its self-activation after the addition of 20 mmol/L 3-AT and 400 ng/mL ABA to SD/-Trp-His-Ade medium. By this library a total of 16 different candidate interacting proteins from the wheat and the leaf rust were screened. These proteins were involved in plant metabolism, hormone signal transduction, plant disease resistance and other aspects. It indicated that Pt34084 could interfere with the host defense response and promote leaf rust infection through multiple pathways. The results are conducive to analyzing the pathogenic mechanism of wheat leaf rust and lay a foundation for creating new effective strategies to prevent and control wheat leaf rust.

Key words: Puccinia triticina Eriks., wheat leaf rust, cDNA library, yeast two-hybrid, effector protein, interaction protein, screening