冠毒素和茉莉酸甲酯对诱导小麦、黑麦和高羊茅草颖花开放的效应  

Inducing Effect of Coronatine and Methyl Jasmonate on the Opening of Spikelets in Wheat, Rye and Mildew

作　　者：闫芝芬[1] 周燮[2] 马春红[1] 崔四平[1] 魏建昆[1] 

机构地区：[1]河北省农林科学院农业物理生理生化研究所,石家庄050051 [2]南京农业大学农学系,南京210095

出　　处：《中国农业科学》2001年第3期334-337,共4页Scientia Agricultura Sinica

基　　金：河北省科技攻关项目(00245511D)

摘　　要：茉莉酸类化合物（ＪＡｓ）是一类新型植物激素，在植物中广泛存在。ＪＡｓ是重要的信号传递物质，在对环境各种胁迫的反应中可调节植物防卫基因的表达。最近曾晓春和周燮发现ＪＡｓ中的重要一员茉莉酸甲酯（ＭｅＪＡ）可诱导水稻颖花的开放。冠毒素是植物病原菌假单胞菌产生的一种致病毒素，国外的许多研究证实它是ＪＡｓ的环戊烷结构类似物，在一些方面可以模拟ＪＡｓ的功能。通过对ＭｅＪＡ和冠毒素是否具有诱导小麦和其它植物颖花开放的作用，诱导效果如何等的探讨结果表明，４ｍｍｏｌ／Ｌ的ＭｅＪＡ和１．１～４．４μｍｏｌ／Ｌ的冠毒素对小麦的颖花开放有明显的诱导效果，ＭｅＪＡ和冠毒素对颖花开放的诱导作用在植物品种之间有明显的差异。Jasmonates (JAs) is a new type of plant hormone, which is widely distributed in higher plants. JAs is a substance of signal transmission that regulates the expression of plant defense genes in response to various environmental stresses. Recently Zeng Xiaochun and Zhou Xie have observed that MeJA (methyl jasmonate), an important member of lAs, can induce the opening of spikelets in rice. Coronatine is a phytotoxin produced by several pathovars of the plant pathogenic Pseudomonas. Coronatine, which is a cyclopentane analog of JAs, can mimic the functions of IA/ MeJA in some aspects. It is worthy of researching if MeJA and coronatine can induce the opening of spikelets in wheat, rye and other plants. The experiments indicated that 4mmol/L MeJA and 1. 1-4. 4μmol/L coronatine can obviously induce the opening of spikelets in wheat. The difference in inductivity obviously exists among different plant varieties.

关 键 词：小麦 黑麦 高羊茅草 茉莉酸甲酯 冠毒素 颖花 植物激素 

分 类 号：S312[农业科学—作物栽培与耕作技术]