转基因植物表达植酸酶研究进展

Research Progress in Transgenic Plants Expressing Recombinant Phytase

植酸是植物体内磷的主要存在形式,其绝大部分不能被单胃动物消化吸收,而随粪便排出体外造成环境污染;同时,植酸又是一种抗营养因子,它通过络合植物体内的一些营养成分而降低植物的营养价值。通过植物转基因方法使植物自身表达足量的植酸酶,以减小植酸带来的不利影响,是提高植物性饲料营养价值和控制环境磷污染的一种经济有效的措施。就转基因植物植酸酶的优势、研究现状、存在的问题及其发展前景进行了综述。

Phytic acid is the main storage form of phosphorus in plants. Due to the lack of phytase in monogastric animal digestive tract, most of the phytic acid is unavailable, and directly excreted to manure. High phytic acid content in manure results in elevated phosphorus levels in soil and water and accompanying environmental concerns. Furthermore, as a sort of antinutrient, phytic acid will chelated some nutrients in plants and consequently reduce the nutrition value of plants. It is desirable that transgenic plants themselves express sufficient recombinant phytase to minimize the disadvantage from phytic acid by plants gene engineering. The superiority of transgenic plants phytase is summarized, the research progress is reviewed, and its development prospects are also discussed.