期刊
PLANT SIGNALING & BEHAVIOR
卷 3, 期 11, 页码 1014-1015出版社
TAYLOR & FRANCIS INC
DOI: 10.4161/psb.6737
关键词
leaf abscission; reactive oxygen species; H2O2; in vitro; ethylene; auxin; pepper; NADPH oxidase
资金
- Iwate Prefectural government
- Japan Society for the Promotion of Science [18580047]
Reactive oxygen species (ROS) are produced in response to many environmental stresses, such as UV, chilling, salt and pathogen attack. These stresses also accompany leaf abscission in some plants, however, the relationship between these stresses and abscission is poorly understood. In our recent report, we developed an in vitro abscission system that reproduces stress-induced pepper leaf abscission in planta. Using this system, we demonstrated that continuous production of hydrogen peroxide (H2O2) is involved in leaf abscission signaling. Continuous H2O2 production is required to induce expression of the cell wall-degrading enzyme, cellulase and functions downstream of ethylene in abscission signaling. Furthermore, enhanced production of H2O2 occurs at the execution phase of abscission, suggesting that H2O2 also plays a role in the cell-wall degradation process. These data suggest that H2O2 has several roles in leaf abscission signaling. Here, we propose a model for these roles.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据