Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành y học dành cho các bạn tham khảo đề tài: Expression profiling and integrative analysis of the CESA/CSL superfamily in rice | Wang et al. BMC Plant Biology 2010 10 282 http 1471-2229 10 282 BMC Plant Biology RESEARCH ARTICLE Open Access Expression profiling and integrative analysis of the CESA CSL superfamily in rice f 12 12 2 w z- -3 Lingqiang Wang Kai Guo Yu Li Yuanyuan Tu Huizhen Hu Bingrui Wang Xiaocan Cui Liangcai Peng1 2 3 Abstract Background The cellulose synthase and cellulose synthase-like gene superfamily CESA CSL is proposed to encode enzymes for cellulose and non-cellulosic matrix polysaccharide synthesis in plants. Although the rice Oryza sativa L. genome has been sequenced for a few years the global expression profiling patterns and functions of the OsCESA CSL superfamily remain largely unknown. Results A total of 45 identified members of OsCESA CSL were classified into two clusters based on phylogeny and motif constitution. Duplication events contributed largely to the expansion of this superfamily with Cluster I and II mainly attributed to tandem and segmental duplication respectively. With microarray data of 33 tissue samples covering the entire life cycle of rice fairly high OsCESA gene expression and rather variable OsCSL expression were observed. While some members from each CSL family A1 C9 D2 E1 F6 and H1 were expressed in all tissues examined many of OsCSL genes were expressed in specific tissues stamen and radicles . The expression pattern of OsCESA CSL and OsBCIL which extensively co-expressed with OsCESA CSL can be divided into three major groups with ten subgroups each showing a distinct co-expression in tissues representing typically distinct cell wall constitutions. In particular OsCESAl -3 -8 and OsCESA4 -7 -9 were strongly co-expressed in tissues typical of primary and secondary cell walls suggesting that they form as a cellulose synthase complex these results are similar to the findings in Arabidopsis. OsCESA5 OsCESA6 is likely partially redundant with OsCESA3 for OsCESA complex organization in the specific tissues .
