| Budget Amount *help |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2017: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2016: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2015: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
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| Outline of Final Research Achievements |
When plants are wounded, they produce reactive oxygen species (ROS), jasmonic acid and ethylene as inducers of defense responses. However, their effects on secondary metabolites have been little known. We investigated the effects of those signals on lignification and lignin synthesis in the secondary phloem of Chamaecyparis obtusa in this study. Exogenous treatments of jasmonate did not affect the location of lignification induced by wounds but promoted the lignin synthesis. The location of lignification was related with cell wall discoloration. It was suggested that the wall discoloration was caused by the generation of ROS. These results show that lignification in the phloem of C. obtusa is regulated by the two signals, ROS and jasmonate, which have different characteristics for defense induction.
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