水稻早期创伤反应过程中茉莉酸与水杨酸之间的负相关关系。
Inverse correlation between jasmonic acid and salicylic acid during early wound response in rice.
作者信息
Lee Ayoung, Cho Kyoungwon, Jang Sungkuk, Rakwal Randeep, Iwahashi Hitoshi, Agrawal Ganesh Kumar, Shim Jaehan, Han Oksoo
机构信息
Department of Applied Biotechnology, Agricultural Plant Stress Research Center, Biotechnology Research Institute, Chonnam National University, Kwangju 500-757, Republic of Korea.
出版信息
Biochem Biophys Res Commun. 2004 Jun 4;318(3):734-8. doi: 10.1016/j.bbrc.2004.04.095.
This study presents a kinetic analysis of the response to wounding in rice plants. In particular, jasmonic acid, salicylic acid, and lipoxygenase activity were measured in leaves of wounded rice plants during the early tillering phase. The results show that endogenous jasmonic acid transiently increases to a maximum 30 min after wounding (jasmonic acid burst) and lipoxygenase activity increases after the jasmonic acid burst, but not after the second smaller peak of endogenous jasmonic acid 23 h after wounding. In contrast, endogenous salicylic acid decreases during the jasmonic acid burst, such that the kinetic profiles of jasmonic acid and salicylic acid are inversely correlated during the early response to wounding. It is proposed here that the increase in endogenous jasmonic acid and the decrease in endogenous salicylic acid may contribute for establishing the efficient negative cross-talk between jasmonic acid and salicylic acid signaling pathways during the early response to wounding in rice.
本研究对水稻植株受伤后的反应进行了动力学分析。具体而言，测定了分蘖初期受伤水稻植株叶片中的茉莉酸、水杨酸和脂氧合酶活性。结果表明，内源茉莉酸在受伤后30分钟短暂增加至最大值（茉莉酸爆发），脂氧合酶活性在茉莉酸爆发后增加，但在受伤23小时后内源茉莉酸的第二个较小峰值后未增加。相反，内源水杨酸在茉莉酸爆发期间减少，使得在受伤早期反应中茉莉酸和水杨酸的动力学曲线呈负相关。本文提出，内源茉莉酸的增加和内源水杨酸的减少可能有助于在水稻受伤早期反应中建立茉莉酸和水杨酸信号通路之间有效的负向相互作用。
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