Systematic analysis of transcription factors in Marchantia polymorpha

转录因子是包括发育和环境反应在内的各种生物过程的主要调节因子。拟南芥（Arabidopsis thaliana）和小壶草（Physcomitrella patens）分别含有2000个和1200个转录因子。多态地茅（Marchantia polymorpha）是一种新兴的发育和进化模式生物。多形草在陆地植物进化中占有重要地位，具有单倍体优势生命周期，在分子遗传分析中具有二倍体植物所没有的优势。在这项研究中，我们通过搜索我们的EST和rna序列数据库（包括超过20,000个基因），确定了大约300个多态m.a的转录因子。令人惊讶的是，多态拟南芥有38个与拟南芥相同的转录因子家族。这些结果表明，多形霉转录因子的冗余度应该很低，多形霉为遗传分析提供了合适的系统。

Transcription factors are major regulators for various biological processes including development and environmental responses. Arabidopsis thaliana and Physcomitrella patens have 2,000 and 1,200 transcription factors, respectively. The liverwort Marchantia polymorpha is an emerging model organism for developmental and evolutional studies. M. polymorpha occupies a crucial position in the evolution of land plant and has the haploid-dominant life cycle, which provides advantages over diploid plants for molecular genetic analysis. In this study, we identified ca. 300 transcription factors in M. polymorpha by searching our EST and RNA-sequence databases that include more than 20,000 genes. Surprisingly, M. polymorpha had 38 transcription factor families that are common numbers with A. thaliana. These results indicate that redundancy of transcription factors in M. polymorpha should be very low and that M. polymoroha provides suitable system for genetic analysis.