关键词: 分生组织 基因 CLV WUS 禾本科作物

Abstract:

Plant architecture is mainly determined by the developmental regulation of shoot apical meristem （SAM）. In Arabidopsis, the CLV/WUS pathway is one of the most important regulatory mechanisms of shoot apical meristem. The CLV pathway promotes organogenesis, while the WUS pathway induces meristem cell proliferation. CLV/WUS pathway is a feedback loop, which would maintain the balance between proliferation and differentiation. Homologous CLV and WUS were confirmed to be existed in rice and corn, which are representatives of cereal crops. On the basis of mutant gene cloning and phylogenetic comparison, it was proofed that CLV/WUS pathway was potentially conserved in cereal crops. Since the development of shoot apical meristem is correlated with yield and quality of cereal crops, further study on CLV/WUS signal pathway in cereal crops will contribute a lot to genetic improvement of cereal crops.

Key words: meristem , gene , CLV , WUS , cereal crop