期刊
JOURNAL OF INTEGRATIVE PLANT BIOLOGY
卷 51, 期 2, 页码 167-174出版社
WILEY-BLACKWELL
DOI: 10.1111/j.1744-7909.2008.00763.x
关键词
callose deposition; defense responses; hypersensitive cell death; hydrogen peroxide; priming; riboflavin
资金
- National Science Fund for Distinguished Young Scholars [30525088]
- State Key Basic Research and Development Plan of China [2006CB101902]
- National Natural Science Foundation of China [30771441]
- Hi-Tech Research and Development Program of China [2006AA10Z430]
Riboflavin (vitamin B(2)) participates in a variety of redox processes that affect plant defense responses. Previously we have shown that riboflavin induces pathogen resistance in the absence of hypersensitive cell death (HCD) in plants. Herein, we report that riboflavin induces priming of defense responses in Arabidopsis thaliana toward infection by virulent Pseudomonas syringae pv. tomato DC3000 (Pst). Induced resistance was mechanistically connected with the expression of defense response genes and cellular defense events, including H(2)O(2) burst, HCD, and callose deposition in the plant. Riboflavin treatment and inoculation of plants with Pst were neither active but both synergized to induce defense responses. The priming process needed NPR1 (essential regulator of systemic acquired resistance) and maintenance of H(2)O(2) burst but was independent of salicylic acid, jasmonic acid, ethylene, and abscisic acid. Our results suggest that the role of riboflavin in priming defenses is subject to a signaling process distinct from the known pathways of hormone signal transduction.
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