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Influence of rice black streaked dwarf virus on the ecological fitness of non-vector planthopper Nilaparvata lugens （Hemiptera： Delphacidae）

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Insect Science 2014年第4期21卷 507-514页

作者： Hong-Xing Xu Xiao-Chan He Xu-Song Zheng Ya-Jun Yang Zhong-Xian Lu State Key Laboratory Breeding Base for Zhejiang Sustainable Pest and Disease Control Institute of Plant Protection and Microbiology Zhejiang Academy of Agricultural Sciences Hangzhou Jinhua Academy of Agricultural Sciences Jinhua Zhejiang 321017 China

rice black streak dwarf virus （RBSDV） is transmitted by the small brown planthopper （SBPH）, Laodelphax striatellus （Fallen）. Non-vector rice brown planthopper （BPH）, Nilaparvata lugens （Stal）, shares the same host rice plants with SBPH in paddy fields. The changes in nutritional composition of rice plants infected by RBSDV and the ecological fitness of BPH feeding on the infected plants were studied under both artificial climate chamber and field conditions. Contents of 16 detected amino acids and soluble sugar in RBSDV infected rice plants were higher than those in the healthy ones. On the diseased plants BPH had significantly higher nymphal survival rates, nymphal duration of the males, weight of the female adults, as well as egg hatchability compared to BPH being fed on healthy plants. However, there was no obvious difference in female nymph duration, longevity and fecundity. Defense enzymes （superoxidase dismutase, SOD and catalase, CAT） and detoxifying enzymes （carboxylesterase, CAE and glutathione S-transferase, GST） in BPH adults fed on diseased plants had markedly higher activities. The results indicate rice plants infected by RBSDV improved the ecological fitness of the brown planthopper, a serious pest but not a transmitter of the RBSDV virus.

关键词： defense enzymes detoxifying enzymes ecological fitness Nilaparvata lu-gens non-vector rice black streaked dwarf virus

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Ecological Fitness of Non-vector Planthopper Sogatella furcifera on rice Plants Infected with rice black streaked dwarf virus

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rice science 2012年第4期19卷 335-338页

作者： HE Xiao-chan XU Hong-xing ZHENG Xu-song YANG Ya-jun GAO Guang-chun PAN Jian-hong LU Zhong-xian Institute of Plant Protection and Microbiology Zhejiang Academy of Agricultural Sciences Department of Plant Protection Nanjing Agricultural University

We evaluated the effects of rice black streak dwarf virus （RBSDV）-infested rice plants on the ecological parameters and its relevant defensive and detoxification enzymes of white-backed planthopper （WBPH） in laboratory for exploring the relationship between RBSDV and the non-vector planthopper. The results showed that nymph survival rate, female adult weight and fecundity, and egg hatchability of WBPH fed on RBSDV-infested rice plants did not markedly differ from those on healthy plants, whereas the female adult longevity and egg duration significantly shortened on diseased plants. Furthermore, significantly higher activities of defensive enzymes （dismutase, catalase and peroxidase） and detoxification enzymes （acetylcholinesterase, carboxylesterase and glutathione S-transferase） were found in WBPH adults fed on infected plants. Results implied that infestation by RBSDV increased the ecological fitness of non-vector planthopper population.

关键词： ecological fitness rice black streaked dwarf virus non-vector white-backed planthopper

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Dimeric artificial microRNAs mediate highly efficient RSV and RBSDV resistance in transgenic rice plants

Dimeric artificial microRNAs mediate highly efficient RSV an...

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中国植物病理学会第十二届青年学术研讨会

作者： Lin Sun Chao Lin Yunzhi Song Jinwen Du Fujiang Wen Changxiang Zhu State Key Laboratory of Crop Biology Shandong Key Laboratory of Crop BiologyCollege of Life SciencesShandong Agricultural University

Infection of rice stripe virus（RSV） and rice black streaked dwarf virus（RBSDV） on rice results in severe economic losses on crop *** the natural resistance resources against these viruses are limited,it is imperative to elaborate a biotechnological approach that will provide effective and safe immunity to RSV and *** this study,we generated three dimeric amiRNA precursor expression vectors（pamiR-M,pamiR-3 and pamiR-U） that simultaneously targeting RSV and RBSDV based on the structure of rice osa-MIR528 *** transgenic rice plants were obtained by Agrobacterium tumefaciens-mediated transformation and proved to express amiRNAs *** viral challenge assays revealed that these transgenic plants could be conferred highly specific resistance against RSV and RBSDV infection *** amiR-RSVU and the amiR-RBSDVU induced the highest virus resistance against RSV and RBSDV,*** target viral RNAs could be cleavaged by the amiRNAs and there was a relationship between the resistance level and the accumulation of amiRNA expression.A Northern blot assay verified that silencing was induced by the original amiRNAs and could be bilaterally extended by the siRNA *** amiRNA together with the secondary siRNAs mediated the degradation of viral *** stability assay showed that transgene and amiRNAmediated virus resistance can be stably inherited toT2.

关键词： artificial microRNA rice stripe virus rice black streaked dwarf virus multiple virus resistances transgenic rice

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