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The secondary laticifer differentiation in rubber tree is induced by trichostatin A, an inhibitor of histone acetylation

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Frontiers of Agricultural Science and Engineering 2016年第4期3卷 357-362页

作者： Shixin ZHANG Shaohua WU Weimin TIAN Key Laboratory of Biology and Genetic Resources of Rubber Tree Ministry of Agriculture State Key Laboratory Incubation Base for Cultivation and Physiology of Tropical Crops Rubber Research InstituteChinese Academy of Tropical Agricultural Sciences

The secondary laticifer, a specific tissue in the secondary phloem of rubber tree, is differentiated from the vascular cambia. The number of the secondary laticifer in the trunk bark of rubber tree is positively correlated with rubber yield. Although jasmonates have been demonstrated to be crucial in the regulation of secondary laticifer differentiation, the mechanism for the jasmonate-induced secondary laticifer differentiation remains to be *** using an experimental morphological technique, the present study revealed that trichostatin A(TSA), an inhibitor of histone deacetylation, could induce the secondary laticifer differentiation in a concentrationdependent manner. The results suggest that histone acetylation is essential for the secondary laticifer differentiation in rubber tree.

关键词： Hevea brasiliensis histone acetylation laticifer differentiation trichostatin vascular cambia

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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

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Acta Botanica Sinica 2003年第11期45卷 1366-1372页

作者：田维敏史敏晶于凤义吴继林郝秉中崔克明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

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.

关键词： Hevea brasiliensis jasmonic acid mechanical wounding radioisotope technique laticifer differentiation

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