the complete chloroplast and mitochondrial genome sequences of boea hygrometrica insights into the evolution of plant organellar genomes完整的叶绿体和线粒体基因组序列boea hygrometrica见解organellar植物基因组的进化.pdf

The Complete Chloroplast and Mitochondrial Genome Sequences of Boea hygrometrica: Insights into the Evolution of Plant Organellar Genomes 1,2. 1,2. 2 3 2 2 Tongwu Zhang , Yongjun Fang , Xumin Wang , Xin Deng , Xiaowei Zhang *, Songnian Hu *, Jun Yu2* 1James D. Watson Institute of Genome Sciences, Zhejiang University, Hangzhou, China, 2 CAS Key Laboratory of Genome Sciences and Information, Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing, China, 3 CAS Key Laboratory of Photosynthesis and Molecular Physiology, Research Center of Plant Molecular and Development Biology, Institute of Botany, Chinese Academy of Sciences, Beijing, China Abstract The complete nucleotide sequences of the chloroplast (cp) and mitochondrial (mt) genomes of resurrection plant Boea hygrometrica (Bh, Gesneriaceae) have been determined with the lengths of 153,493 bp and 510,519 bp, respectively. The smaller chloroplast genome contains more genes (147) with a 72% coding sequence, and the larger mitochondrial genome have less genes (65) with a coding faction of 12%. Similar to other seed plants, the Bh cp genome has a typical quadripartite organization with a conserved gene in each region. The Bh mt genome has three recombinant sequence repeats of 222 bp, 843 bp, and 1474 bp in length, which divide the genome into a single master circle (MC) and four isomeric molecules. Compared to other angiosperms, one remarkable feature of the Bh mt genome is the frequent transfer of genetic material from the cp genome during recent Bh evolution. We also analyzed organellar genome evolution in general regarding genome features as well as compositional dynamics of sequence and gene structu