HbCOI1 perceives jasmonate to trigger signal transduction in Hevea brasiliensis.

Juan Chen, Haitao Yang, Sui Ma, Ruifeng Yao, Xi Huang, Jianbin Yan, Daoxin Xie

Tree physiology 2021 Mar 06

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Natural rubber, a strategically essential raw material used in manufacturing throughout the world, is produced from coagulated and refined latex of rubber tree (Hevea brasiliensis). It is known that phytohormone jasmonate (JA) plays an essential role in regulating latex biosynthesis. However, it is unclear how the JA signal is sensed in a rubber tree. Here, we showed that H. brasiliensis CORONATINE-INSENSITIVE 1 (HbCOI1) acts as a receptor that perceives JA to recruit H. brasiliensis JASMONATE ZIM DOMAIN1 (HbJAZ1) for signal transduction. We found that HbCOI1 restores male sterility and JA responses of the coi1-1 mutant in Arabidopsis. The identification of a JA receptor in the rubber tree is essential for elucidating the molecular mechanisms underlying JA-regulated latex biosynthesis. Our results elucidate the mechanism of JA perception in H. brasiliensis and also provide an efficient strategy to identify JA receptors in woody plants. © The Author(s) 2020. Published by Oxford University Press. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.

Citation

Juan Chen, Haitao Yang, Sui Ma, Ruifeng Yao, Xi Huang, Jianbin Yan, Daoxin Xie. HbCOI1 perceives jasmonate to trigger signal transduction in Hevea brasiliensis. Tree physiology. 2021 Mar 06;41(3):460-471