杨树中与次生细胞壁生物合成相关的糖基转移酶研究进展

摘要

随着杨树基因组测序计划的完成,加之生物信息学、生物化学、分子生物学和遗传学等研究方法的不断完善,杨树功能基因组学研究近年来被大大推进.目前,有关杨树材性的研究主要集中于MYBs、NACs、bZIP、HB、WRKY、MADS等转录因子的调控机制以及木质素的合成途径.与之相比,有关次生细胞壁中关键碳水化合物结构的合成及代谢仍然不清楚.糖基转移酶参与木本植物次生细胞壁中碳水化合物的合成和架构,直接影响木质部的发育过程.着重介绍了木本模式植物——杨树中参与次生细胞壁生物合成的糖基转移酶基因家族及其生物学功能,并对其在利用基因工程手段改良杨树材性和选育新品种方面进行了展望.%With the completion of genome sequencing of populus trichacarpa,together with the methods of bioinformatics,biochemistry,molecular biology and genetics,the functional genomics of poplar were greatly promoted.So far,the wood-related reseaches in poplar were mainly concentrated on the transcripional factors including MYBs,NACs,bZIP,HB,WRKY,MADS and on the lignin biosynthesis pathway.In comparison,the metabolic pathways of the key structural carbohydrates still remain unclear.Glycosyltransferases are involved in the biosynthesis and remodeling of the carbahydrates in poplar xylem,thus directly affecting xylem developmental process.In this review,an emphasis on the glycosyltransferase gene family and their biological functions involved in secondary cell wall biosynthesis in the woody model system-poplar weere summarized,and the future perspectives on the modification of wood properties in poplar by genetic engineering and new variety breeding were given.