| Title: | Silencing OsSLR1 enhances the resistance of rice to the brown planthopper Nilaparvata lugens |
| Author(s): | Zhang J; Luo T; Wang W; Cao T; Li R; Lou Y; |
| Address: | "State Key Laboratory of Rice Biology, Institute of Insect Sciences, Zhejiang University, Hangzhou, 310058, China" |
| ISSN/ISBN: | 1365-3040 (Electronic) 0140-7791 (Linking) |
| Abstract: | "DELLA proteins, negative regulators of the gibberellin (GA) pathway, play important roles in plant growth, development and pathogen resistance by regulating multiple phytohormone signals. Yet, whether and how they regulate plant herbivore resistance remain unknown. We found that the expression of the rice DELLA gene OsSLR1 was down-regulated by an infestation of female adults of the brown planthopper (BPH) Nilaparvata lugens. On one hand, OsSLR1 positively regulated BPH-induced levels of two mitogen-activated protein kinase and four WRKY transcripts, and of jasmonic acid, ethylene and H(2) O(2) . On the other hand, silencing OsSLR1 enhanced constitutive levels of defence-related compounds, phenolic acids, lignin and cellulose, as well as the resistance of rice to BPH in the laboratory and in the field. The increased resistance in rice with silencing of OsSLR1 is probably due to impaired JA and ethylene pathways, and, at least in part, to the increased lignin level and mechanical hardness of rice leaf sheaths. Our findings illustrate that OsSLR1, acting as an early negative regulator, plays an important role in regulating the resistance of rice to BPH by activating appropriate defence-related signalling pathways and compounds. Moreover, our data also provide new insights into relationships between plant growth and defence" |
| Keywords: | "Animals Cell Wall/metabolism Cellulose/metabolism Cyclopentanes Ethylenes Gene Expression Regulation, Plant *Gene Silencing Genes, Plant Hemiptera/*physiology Hydrogen Peroxide/metabolism Hydroxybenzoates/metabolism Lignin/metabolism Oryza/genetics/*paras;" |
| Notes: | "MedlineZhang, Jin Luo, Ting Wang, Wanwan Cao, Tiantian Li, Ran Lou, Yonggen eng 2017/07/01 Plant Cell Environ. 2017 Oct; 40(10):2147-2159. doi: 10.1111/pce.13012. Epub 2017 Aug 24" |
