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Lin Y, Sun Z, Li Z, Xue R, Cui W, Sun S, Liu T, Zeng R, Song Y. Deficiency in Silicon Transporter Lsi1 Compromises Inducibility of Anti-herbivore Defense in Rice Plants. FRONTIERS IN PLANT SCIENCE 2019; 10:652. [PMID: 31178878 PMCID: PMC6543919 DOI: 10.3389/fpls.2019.00652] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Accepted: 04/30/2019] [Indexed: 05/02/2023]
Abstract
Silicon (Si) application can significantly enhance rice resistance against herbivorous insects. However, the underlying mechanism is elusive. In this study, silicon transporter mutant OsLsi1 and corresponding wild-type rice (WT) were treated with and without Si to determine Si effects on rice resistance to leaffolder (LF), Cnaphalocrocis medinalis (Guenée) (Lepidoptera: Pyralidae). Si application on WT plants significantly promoted rice plant growth, upregulated expression level of OsLsi1 and increased Si accumulation in the leaves and roots, as well as effectively reduced LF weight gain, while it showed only marginal or no effect on the mutant plants. Furthermore, upon LF infestation, transcript levels of OsLOX, OsAOS2, OsCOI1a, OsCOI1b, and OsBBPI, and activity of catalase, superoxide dismutase, peroxidase, and polyphenol oxidase were significantly higher in Si-treated than untreated WT plants. However, OsLsi1 mutant plants displayed higher susceptibility to LF, and minimal response of defense-related enzymes and jasmonate dependent genes to Si application. These results suggest that induced defense plays a vital role in Si-enhanced resistance and deficiency in silicon transporter Lsi1 compromises inducibility of anti-herbivore defense in rice plants.
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Affiliation(s)
- Yibin Lin
- Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops, College of Crop Science, Fujian Agriculture and Forestry University, Fuzhou, China
- Institute of Crop Resistance and Chemical Ecology, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Zhongxiang Sun
- Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops, College of Crop Science, Fujian Agriculture and Forestry University, Fuzhou, China
- Institute of Crop Resistance and Chemical Ecology, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Zhenfang Li
- Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops, College of Crop Science, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Rongrong Xue
- Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops, College of Crop Science, Fujian Agriculture and Forestry University, Fuzhou, China
- Institute of Crop Resistance and Chemical Ecology, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Weikang Cui
- Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops, College of Crop Science, Fujian Agriculture and Forestry University, Fuzhou, China
- Institute of Crop Resistance and Chemical Ecology, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Shaozhi Sun
- Institute of Crop Resistance and Chemical Ecology, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Tingting Liu
- Institute of Crop Resistance and Chemical Ecology, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Rensen Zeng
- Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops, College of Crop Science, Fujian Agriculture and Forestry University, Fuzhou, China
- Institute of Crop Resistance and Chemical Ecology, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Yuanyuan Song
- Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops, College of Crop Science, Fujian Agriculture and Forestry University, Fuzhou, China
- Institute of Crop Resistance and Chemical Ecology, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, China
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