Lignin is an integral part of secondary cell walls in plants and plays important roles in maintaining the strength of stems,enhancing transport ability of stems,and providing resistance to multiple stresses.Lignin bio...Lignin is an integral part of secondary cell walls in plants and plays important roles in maintaining the strength of stems,enhancing transport ability of stems,and providing resistance to multiple stresses.Lignin biosynthesis has become one of the hotspots in molecular forest biology research.The AP1 transcription factor plays important roles in plant fower development.However,in this study,suppression of BpAP1 altered the transcription profiles of white birch and RNA-seq was used to find that suppression of BpAP1 changed the expression of lignin pathway-related genes;C4 H/CYP73A,POD were down-regulated and HCT,CCoAOMT,REF1 and CAD were up-regulated.Cell walls of the suppressed transgenic birch were significantly thinner than the wild type of birch,and Bp AP1-repressed birch contained less lignin.In addition to regulation of foral development,BpAP1 might play a role in regulating the expression of genes in lignin biosynthesis of birch.This study could provide a new insight into the function of AP1 genes in woody species.展开更多
基金supported by the National Natural Science Foundation of China(31800556)the Fundamental Research Funds for the Central Universities(2572018BW06)。
文摘Lignin is an integral part of secondary cell walls in plants and plays important roles in maintaining the strength of stems,enhancing transport ability of stems,and providing resistance to multiple stresses.Lignin biosynthesis has become one of the hotspots in molecular forest biology research.The AP1 transcription factor plays important roles in plant fower development.However,in this study,suppression of BpAP1 altered the transcription profiles of white birch and RNA-seq was used to find that suppression of BpAP1 changed the expression of lignin pathway-related genes;C4 H/CYP73A,POD were down-regulated and HCT,CCoAOMT,REF1 and CAD were up-regulated.Cell walls of the suppressed transgenic birch were significantly thinner than the wild type of birch,and Bp AP1-repressed birch contained less lignin.In addition to regulation of foral development,BpAP1 might play a role in regulating the expression of genes in lignin biosynthesis of birch.This study could provide a new insight into the function of AP1 genes in woody species.
