植物蔗糖合酶研究进展

Research progress of sucrose synthase in plants

蔗糖合酶是一种糖基转移酶,以基因家族形式广泛存在于植物中。由于蔗糖合酶家族各同源基因的时空表达模式不同,其生物学功能呈多样化。蔗糖合酶主要功能可为纤维素、胼胝质和淀粉等多糖生物合成提供底物尿苷二磷酸葡萄糖(UDPG)和间接底物腺苷二磷酸葡萄糖(ADPG),故在植物碳源分配中起关键调控作用,并影响相关重要农艺性状和非生物逆境响应。本文拟从其结构特征、生化功能和生物学特性等方面介绍蔗糖合酶近期研究进展,并初步提出了此类基因在植物遗传改良中的利用。

Sucrose synthase(SUS)is a glycosyltransferase occurred in the most highly plants,and the SUS family genes are distinctively expressed in different plant tissues.As the SUSs play a key regulation role in carbon partitioning by providing UDP-glucose and ADP-glucose substrates for cellulose,callose,and other polysaccharides biosynthesis,they dynamically influence major agronomic traits and abiotic stress resistances in crops.In this review,we performed a phylogenetic analysis of SUS genes examined in plants,and updated their biochemical function and biological feature.Finally,this review proposed an engineering strategy of SUS for potential genetic improvements of major agronomic traits in crops.