Regulation of jasmonic acid biosynthesis by silicon application during physical injury to Oryza sativa L

Yoon Ha Kim, Abdul Latif Khan, Muhammad Waqas, Hee Jeong Jeong, Duk Hwan Kim, Jeong Sheop Shin, Jong Guk Kim, Myung Hun Yeon, In Jung Lee

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Abstract

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.

Original languageEnglish
Pages (from-to)525-532
Number of pages8
JournalJournal of Plant Research
Volume127
Issue number4
DOIs
Publication statusPublished - 2014 Jan 1

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ASJC Scopus subject areas

  • Plant Science

Cite this

Kim, Y. H., Khan, A. L., Waqas, M., Jeong, H. J., Kim, D. H., Shin, J. S., Kim, J. G., Yeon, M. H., & Lee, I. J. (2014). Regulation of jasmonic acid biosynthesis by silicon application during physical injury to Oryza sativa L. Journal of Plant Research, 127(4), 525-532. https://doi.org/10.1007/s10265-014-0641-3