Analysis of molecular mechanism for synthesis of salicylic acid on defense responses in rice

2015 Fiscal Year Final Research Report

• Project/Area Number: 25450067
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Plant protection science
• Research Institution: National Institute of Agrobiological Sciences
• Principal Investigator: TAKAHASHI AKIRA 国立研究開発法人農業生物資源研究所, 耐病性作物研究開発ユニット, 主任研究員 (20414914)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: イネ / サリチル酸 / ICS

Outline of Final Research Achievements

Salicylic acid (SA) is an important inducer of defense responses in plants. In rice, however, it is unknown whether SA has a direct role to trigger defense responses. Furthermore, the synthesis pathway of SA is not clear in rice.
Previously, we reported the possibility that the activation of defense responses, including expression of defense related genes and HR-like lesion formation, depends on the accumulation of SA in rice. Here, we examined the molecular mechanism of SA synthesis in defense responses using the rice mutant which over-accumulates SA compared with the wild type siblings. We also focused on isochorismate synthase (ICS) gene which is a key enzyme for SA synthesis in Arabidopsis. We identified the rice ICS homologous gene and analyzed the contribution of it on the activation of defense responses in rice.

Free Research Field

植物分子遺伝学