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Localized Effects of Mechanical Wounding and Exogenous Jasmonic Acid on the Induction of Secondary Laticifer Differentiation in Relation to the Distribution of Jasmonic Acid in Hevea brasiliensis

机械伤害和外施茉莉酸对巴西橡胶树次生乳管分化的局部效应及其与茉莉酸分布的关系(英文)

作     者:田维敏 史敏晶 于凤义 吴继林 郝秉中 崔克明 

作者机构:北京大学生命科学学院北京100871 华南热带农业大学农学院儋州571737 中国农业科学院原子能利用研究所北京100094 中国热带农业科学院橡胶栽培研究所热带作物栽培生理学农业部重点开放实验室儋州571737 

出 版 物:《Acta Botanica Sinica》 (Acta Botanica Sinica(植物学报:英文版))

年 卷 期:2003年第45卷第11期

页      面:1366-1372页

核心收录:

学科分类:09[农学] 0903[农学-农业资源与环境] 

基  金:国家自然科学基金(30160006:30170056) 

主  题:Hevea brasiliensis jasmonic acid mechanical wounding radioisotope technique laticifer differentiation 

摘      要:The relationship between the effect of exogenous jasmonic acid (JA) on the induction of secondary laticifer differentiation and the distribution of JA in the seedling of Hevea brasiliensis Mull. Arg. was investigated with the aid of experimental morphological and radioisotope technique. Most radioactivity of H-3-JA sustained in treated site within one hour while no radioactivity was detected in new shoot and the radioactivity in upper leaf was much less than that in the parts below the treated site, suggesting that JA was mainly transported downwards in the shoot of H brasiliensis. Mechanical wounding hindered the entrance of exogenous JA remarkably while held back the entered JA to the regions around wounded site. The effect of exogenous JA and mechanical wounding on the induction of the secondary laticifer differentiation was limited to treated site where high level of JA was expected. Mechanical wounding reduced the effect of exogenous JA on the differentiation of secondary laticifer, which could be ascribed to the hindrance of mechanical wounding to the entrance of exogenous JA. It was concluded from the combined data that a high accumulation of JA was required for inducing the secondary laticifer differentiation in H. brasiliensis.

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