期刊
JOURNAL OF PLANT RESEARCH
卷 127, 期 4, 页码 525-532出版社
SPRINGER JAPAN KK
DOI: 10.1007/s10265-014-0641-3
关键词
Jasmonic acid biosynthesis; Wounding stress; Silicon; Plant growth; Lipid peroxidation
资金
- Eco-Innovation Project, Korean Governments R&D program on Environmental Technology and Development, Republic of Korea
We investigated the effects of silicon (Si) application on rice plants (Oryza sativa L.) and its responses in the regulation of jasmonic acid (JA) during wounding stress. Endogenous JA was significantly higher in wounded rice plants than in non-wounded. In contrast, Si treatment significantly reduced JA synthesis as compared to non-Si applications under wounding stress. mRNA expression of O. sativa genes showed down-regulation of lipoxygenase, allene oxide synthase 1, allene oxide synthase 2, 12-oxophytodienoate reductase 3, and allene oxide cyclase upon Si application and wounding stress as compared to non-Si-treated wounded rice plants. The physical injury-induced-oxidative stress was modulated by Si treatments, which resulted in higher catalase, peroxidase, and polyphenol oxidase activities as compared with non-Si-treated plants under wounding stress. The higher Si accumulation in rice plants also reduced the level of lipid peroxidation, which helped the rice plants to protect it from wounding stress. In conclusion, Si accumulation in rice plants mitigated the adverse effects of wounding through regulation of antioxidants and JA.
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