| Title: | Silicon amendment is involved in the induction of plant defense responses to a phloem feeder |
| Author(s): | Yang L; Han Y; Li P; Li F; Ali S; Hou M; |
| Address: | "State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, 100193, China. Southern Regional Collaborative Innovation Center for Grain and Oil Crops in China, Changsha, 410128, China. Institute of Plant Protection of Hunan Province, Changsha, 410125, China. State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, 100193, China. mlhou@ippcaas.cn. Southern Regional Collaborative Innovation Center for Grain and Oil Crops in China, Changsha, 410128, China. mlhou@ippcaas.cn" |
| DOI: | 10.1038/s41598-017-04571-2 |
| ISSN/ISBN: | 2045-2322 (Electronic) 2045-2322 (Linking) |
| Abstract: | "Plant resistance to herbivores is a key component in integrated pest management. In most cases, silicon (Si) amendment to plants enhances resistance to herbivorous insects. The increase of plant physical barrier and altered insect behaviors are proposed as mechanisms for the enhanced resistance in Si-amended plants, but our understanding of the induced mechanisms involved in Si-enhanced plant resistance to phloem-feeding insects remains unclear. Here, we show that Si amendment to rice (Oryza sativa) plants impacts multiple plant defense responses induced by a phloem-feeder, the brown planthopper (Nilaparvata lugens, BPH). Si amendment improved silicification of leaf sheaths that BPH feed on. Si addition suppressed the increase of malondialdehyde concentration while encouraged increase of H(2)O(2) concentration in plants attacked by BPH. Higher activities of catalase and superoxide dismutase were recorded in Si-amended than in non-amended BPH-infested plants. BPH infestation activated synthases for secondary metabolites, polyphenol oxidase and pheny-lalanine ammonia-lyase, and beta-1,3-glucanase, but the activation was greater in Si-amended than in non-amended plants. Taken together, our findings demonstrate that Si amendment interacts with BPH infestation in the induction of plant defense responses and consequently, to confer enhanced rice plant resistance" |
| Keywords: | "Animals Disease Resistance/*drug effects Gene Expression Regulation, Plant/drug effects Hemiptera/drug effects/pathogenicity Herbivory/*drug effects Hydrogen Peroxide/chemistry Oryza/genetics/growth & development/parasitology *Pest Control Phloem/chemistr;" |
| Notes: | "MedlineYang, Lang Han, Yongqiang Li, Pei Li, Fei Ali, Shahbaz Hou, Maolin eng Research Support, Non-U.S. Gov't England 2017/06/28 Sci Rep. 2017 Jun 26; 7(1):4232. doi: 10.1038/s41598-017-04571-2" |
