数字农科院2.0

Silicon Amendment To Rice Plants C.ontributes To Reduced Feeding I n A Phloem-Sucking Insect Through Modulation Of Callose Deposition

文献类型： 外文期刊

作者： Li, Fei;Hou, Maolin;Sun, Xiaoqin;Ali, Shahbaz;Li, Fei;Sun, Xiaoqin;Yang, Lang;Ali, Shahbaz;Li, Pei;Yang, Lang;Ali, Shahbaz;Sun, Xiaoqin;Hou, Maolin;Hou, Maolin;Li, Pei;Yang, Lang;Li, Pei;Li, Fei

作者机构：

关键词： beta-1; 3-glucanase; callose; callose synthase; Nilaparvata lugens; phloem feeding; plant defense; rice; silicon amendment

期刊名称： ECOLOGY AND EVOLUTION

ISSN： 2045-7758

年卷期： 2018 年 8 卷 1 期

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摘要： Silicon (Si) uptake by Poaceae plants has beneficial effects on herbivore defense. Increased plant physical barrier and altered herbivorous feeding behaviors are documented to reduce herbivorous arthropod feeding and contribute to enhanced plant defense. Here, we show that Si amendment to rice (Oryza sativa) plants contributes to reduced feeding in a phloem feeder, the brown planthopper (Nilaparvata lugens, BPH), through modulation of callose deposition. We associated the temporal dynamics of BPH feeding with callose deposition on sieve plates and further with callose synthase and hydrolase gene expression in plants amended with Si. Biological assays revealed that BPH feeding was lower in Si-amended than in nonamended plants in the early stages post-BPH infestation. Histological observation showed that BPH infestation triggered fast and strong callose deposition in Si-amended plants compared with nonamended plants. Analysis using qRT-PCR revealed that expression of the callose synthase gene OsGSL1 was up-regulated more and that the callose hydrolase (beta-1,3-glucanase) gene Gns5 was up-regulated less in Si-amended than in nonamended plants during the initial stages of BPH infestation. These dynamic expression levels of OsGSL1 and Gns5 in response to BPH infestation correspond to callose deposition patterns in Si-amended versus nonamended plants. It is demonstrated here that BPH infestation triggers differential gene expression associated with callose synthesis and hydrolysis in Si-amended and nonamended rice plants, which allows callose to be deposited more on sieve tubes and sieve tube occlusions to be maintained more thus contributing to reduced BPH feeding on Si-amended plants.

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