Ethylene Response Factors Are Controlled by Multiple Harvesting Stresses in Hevea brasiliensis
文献类型： 外文期刊
作者： Putranto, Riza-Arief 1 ; Duan, Cuifang 1 ; Kuswanhadi 4 ; Chaidamsari, Tetty 2 ; Rio, Maryannick 1 ; Piyatrakul, Pi 1 ;
作者机构： 1.CIRAD, UMR DAP, Montpellier, France
2.IBRIEC, Bogor, Indonesia
3.CATAS, RRI, Danzhou, Hainan, Peoples R China
4.IRRI, Sembawa, Palembang, Indonesia
5.Rubber Res Inst, Bangkok, Thailand
6.CIRAD, UMR BGPI, Montpellier, France
7.BIG CAS, Beijing, Peoples R China
期刊名称：PLoS One （ 影响因子：3.24； 五年影响因子：3.788 ）
ISSN： 1932-6203
年卷期： 2015 年 10 卷 4 期
页码：
收录情况： SCI
摘要： Tolerance of recurrent mechanical wounding and exogenous ethylene is a feature of the rubber tree. Latex harvesting involves tapping of the tree bark and ethephon is applied to increase latex flow. Ethylene is an essential element in controlling latex production. The ethylene signalling pathway leads to the activation of Ethylene Response Factor (ERF) transcription factors. This family has been identified in Hevea brasiliensis. This study set out to understand the regulation of ERF genes during latex harvesting in relation to abiotic stress and hormonal treatments. Analyses of the relative transcript abundance were carried out for 35 HbERF genes in latex, in bark from mature trees and in leaves from juvenile plants under multiple abiotic stresses. Twenty-one HbERF genes were regulated by harvesting stress in laticifers, revealing an overrepresentation of genes in group IX. Transcripts of three HbERF-IX genes from HbERF-IXc4, HbERF-IXc5 and HbERF-IXc6 were dramatically accumulated by combining wounding, methyl jasmonate and ethylene treatments. When an ethylene inhibitor was used, the transcript accumulation for these three genes was halted, showing ethylene-dependent induction. Subcellular localization and transactivation experiments confirmed that several members of HbERF-IX are activator-type transcription factors. This study suggested that latex harvesting induces mechanisms developed for the response to abiotic stress. These mechanisms probably depend on various hormonal signalling pathways. Severalmembers of HbERF-IX could be essential integrators of complex hormonal signalling pathways in Hevea.
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