Resistance of Antimicrobial Peptide Gene Transgenic Rice to Bacterial Blight

摘要/Abstract

摘要： Antimicrobial peptide is a polypeptide with antimicrobial activity. Antimicrobial peptide genes Np3 and Np5 from Chinese shrimp (Fenneropenaeus Chinensis) were integrated into Oryza sativa L. subsp. japonica cv. Aichi ashahi by Agrobacterium mediated transformation system. PCR analysis showed that the positive ratios of Np3 and Np5 were 36% and 45% in T0 generation, respectively. RT-PCR analysis showed that the antimicrobial peptide genes were expressed in T1 generation, and there was no obvious difference in agronomic traits between transgenic plants and non-transgenic plants. Four Np3 and Np5 transgenic lines in T1 generation were inoculated with Xanthomonas oryzae pv. oryzae strain CR4, and all the four transgenic lines had significantly enhanced resistance to bacterial blight caused by the strain CR4. The Np5 transgenic lines also showed higher resistance to bacterial blight caused by strains JS97-2, Zhe 173 and OS-225. It is suggested that transgenic lines with Np5 gene might possess broad spectrum resistance to rice bacterial blight.

关键词: antimicrobial peptide gene, bacterial blight, resistance, transgenic rice

WANG Wei, WU Chao, LIU Mei, LIU Xu-ri, HU Guo-cheng, SI Hua-min, SUN Zong-xiu, LIU Wen-zhen, FU Ya-ping. Resistance of Antimicrobial Peptide Gene Transgenic Rice to Bacterial Blight[J]. RICE SCIENCE, 2011, 18(1): 10-16 .

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