橡胶树胶乳中硫醇功能以及模式植物中硫醇合成途径研究进展

Function of Thiols in Rubber Tree Latex and Recent Researches on Thiols Anabolism Pathway in Model Plant

天然橡胶是一种用途广泛的天然高分子化合物。限制胶乳产量的因素之一是排胶持续时间,如何延长排胶持续时间一直是排胶生理和割胶技术研究的主要问题。研究发现,割胶后乳管中能产生大量的活性氧,活性氧使黄色体膜氧化破裂是导致胶乳在乳管中原位凝固的主要原因之一。硫醇是乳管细胞中的一类抗氧化剂,具有延迟胶乳凝固的作用,与排胶持续时间密切相关。因此,硫醇的代谢途径成为目前的研究热点。本文总结了橡胶树硫醇功能以及模式植物中硫醇合成关键酶基因研究进展,旨在为进一步研究橡胶树硫醇合成途径关键基因提供指导。

Natural rubber is a raw material of high molecular compound with a widely use.The latex yield is mainly determined by duration of the latex flow.The release of reactive oxygen is claimed to be responsible for the peroxidative degradation of the lutoid membrane.Thiols,an important antioxidant which could delay latex coagulation in laticifer cells,is closely related to prolonging the duration of latex flow.This article summarized thiols,function in latex of rubber tree and recent research on genes encoding for key enzymes for thiol biosynthesis in model plant so as to provide theoretical basis for future study on key enzyme genes of rubber tree latex.