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Chinese Journal of Biological Control ›› 2021, Vol. 37 ›› Issue (5): 1073-1081.DOI: 10.16409/j.cnki.2095-039x.2021.06.00

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Systemic Resistance to Tobacco Mosaic Virus (TMV) Induced by Protein Rhp-PSP of Rhodopseudomonas palustris and Screening of Interaction Protein

ZHOU Hanmei1, CHEN Lijie1, ZHAI Zhongying1, ZHANG Deyong1,2, SU Pin1,2, LIU Yong1,2   

  1. 1. Longping Branch, Graduate School of Hunan University, Changsha 410125, China;
    2. Hunan Plant Protection Institute, Hunan Academy of Agricultural Science, Changsha 410125, China
  • Received:2020-11-25 Online:2021-10-08 Published:2021-10-28

Abstract: The activity of defense enzymes, content of malondialdehyde (MDA) and expression level of resistance gene were determined in TMV inoculated tobacco plants induced by protein Rhp-PSP systemic resistance to TMV. The results showed that protein Rhp-PSP treatment increased the activities of phenylalanine ammonia-lyase (PAL), peroxidase (POD) and polyphenol oxidase (PPO) in TMV inoculated tobacco leaves, but decreased the content of MDA, and up-regulated the gene expression of PR-1, PR-3, PR-5 and PDF1.2 significantly. The above results indicated that protein Rhp-PSP of Rhodopseudomonas palustris could induce systemic resistance to TMV in tobacco. In order to understand the mechanism of induce systemic resistance, the interaction proteins with protein Rhp-PSP were screened in the tobacco cDNA library using yeast two-hybrid system. The result showed that the GPI anchoring protein, VAN3 binding protein, chlorophyll binding protein A may have interaction with Rhp-PSP.

Key words: Rhodopseudomonas palustris, defense-related enzyme, plant defense-related genes, protein interaction

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