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journal1 ›› 2017, Vol. 33 ›› Issue (4): 504-511.DOI: 10.16409/j.cnki.2095-039x.2017.04.010

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Response of Rice Defense-related Genes to Blast Fungus

LIU Chao1,2, WANG Hui1, LIU Lin1, YANG Jing1, LI Chengyun1   

  1. 1. State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan/Yunnan Agricultural University, Kunming 650201, China;
    2. Center for Yunnan Plateau Biological Resources Protection and Utilization/Key Laboratory of Yunnan Province Universities of the Diversity and Ecological Adaptive Evolution for Animals and Plants on YunGui Plateau/Qujing Normal University, Qujing 655011, China
  • Received:2017-01-13 Online:2017-08-08 Published:2017-08-11

Abstract: The rice-Magnaporthe oryzae pathosystem has become a model in the study of plant-fungal interactions. The expression of several signal associated and PR genes were analyzed in six rice lines (harboring resistance genes Pik-s, Pita, Pit, Pi1, Pi9 respectively with the backcross parent LTH) under M. oryzae infection by RT-PCR. The results showed that the rice lines harboring blast resistance gene Pik-s, Pita, Pit were compatible interaction with M. oryzae #626, the rice lines harboring Pi1 and Pi9 were incompatible interaction. The expression of MAPK12 and MAPK6 were up-regulated under susceptible interaction. BIMK2 showed higher expression under Pi9 mediated incompatible interaction. In conclusion, the PR genes expression pattern was more diversity to M. oryzae infection in harboring different resistance genes in rice monogenic lines. The up-regulation response of PR genes appeared in the early infection period in incompatible interactions, and at the late period in compatible interactions, indicating that the temporal expression pattern of these PR genes play an important role in plant pathogen interactions.

Key words: rice blast disease, defense-related gene, rice near isogenic line, interaction

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