外源抗虫蛋白与内源抗虫因子的交互作用

以次生代谢物质萜烯类、黄酮类以及单宁等为基础的自身化学抗虫性一直是植物化学防御的核心.随着基因重组技术的发展,许多作物获得了一种新的化学防御形式,即以表达外源基因产物来进行防御.外源抗虫蛋白与内源抗虫物质的协调性问题,在利用外源基因工程改良植物抗虫性时是非常重要的,同时也是转基因作物安全性和生态学评价的重要方面.转基因植物中外源与内源抗虫系统间的协调性的研究取得了一些成果,但尚未引起人们足够的重视.综述了离体条件下和在转基因植物体内,外源抗虫蛋白Bt和GNA等与植物次生代谢物质以及各抗虫蛋白之间交互作用的研究进展,并探讨了研究各抗虫因子交互作用的意义.

Interaction Between the Inherent Resistant Secondary Metabolites and the Exogenous Insect-Resistance Protein of Transgenic Plants

The inherent resistance based on the secondary metabolites is the main component of the chemical defence mechanisms of plants. It is very important to study the interaction between the inherent resistant secondary metabolites and the exogenous insect-resistance protein, which may help us utilize the insect-resistance genes more effectively. Currently, many transgenic plants with foreign transgenes resistant to insect pests had been released into the environment. The expression of the foreign genes in transgenic plants could cause physiological changes in plants including the changes of secondary metabolism and thus these changes could lead to ecological effects on environment, which was also an important aspect of ecological risk assessment of transgenic plants released into environment. The present progresses of researches on the interaction between insect- resistance protein and secondary metabolites were reviewed. The interaction among insect resis- tance proteins was also discussed and the research significance of the interaction of insect resis- tance factors were analyzed.