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作 者 ：孟春晓 高政权

期 刊 ：广西植物 2008年 4期 页码：539-543

关键词：细胞骨架；解聚剂；碘化钾；大环内酯；采胶；

Keywords:actin cytoskeleton, depolymerizing agents, KI, macrolides, latex exploration,

摘 要 ：初步研究了不同浓度的(1%,5%,10%)KI、饱和浓度的大环内酯作为微丝骨架解聚剂对橡胶树的刺激排胶效果。2%的甲基纤维素处理的橡胶树作为空白。测定了各处理橡胶树的胶乳产量及胶乳的6种生理参数,即干胶含量、总固形物含量、蔗糖含量、无机磷含量、硫醇含量以及镁离子含量。结果表明施用1% KI和饱和浓度大环内酯的橡胶树胶乳产量大量增加,其增产幅度与作为天然橡胶常用刺激采胶剂——0.3%的乙烯利的增产幅度大致相当。比较通过1% KI和饱和浓度大环内酯刺激采胶的胶乳和0.3%的乙烯利刺激采胶的胶乳的各生理参数发现,3种处理得来的胶乳干胶含量和总固形物含量并没有明显的差别,但各处理的其它4个生理参数却差别明显,这意味着KI和饱和浓度大环内酯使橡胶树胶乳增产机制可能与乙烯利的机制不同。值得一提的是,高浓度的KI对橡胶树有明显的副作用,长时间的使用会引起橡胶树死皮病的发生。

Abstract:Stimulated latex exploitation was investigated in rubber trees with saturated macrolides,KI(1%,5%,10%)and 0.3% ethylene.Samples treated with 2% methyl-cellulose were used as blanks. Latex output and its six physiological parameters,the contents of pure rubber,total solid,sucrose,inorganic phosphorus,thiol and Mg²⁺,were measured at the same time. Results showed that application of 1% KI or saturated macrolides could lead to increase of latex yields of rubber trees. The increasing extents of 1% KI or saturated macrolides treatments were almost equivalent to that of 0.3% ethylene treatment used as a common stimulus in latex exploitation nowadays. There were no obvious diversities in pure rubber content and total solid content in latex from rubber trees treated by 1% KI,saturated macrolides and 0.3% ethylene,except for the other four physiological parameters. In addition,KI of high concentration(5% and 10%)was harmful to bark of rubber trees and even caused fatal tapping panel dryness.

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