Complete chloroplast genome sequence of Dryopteris fragrans (L.) Schott and the repeat structures against the thermal environment
文献类型： 外文期刊
作者： Gao, Rui 1 ; Wang, Wenzhong 1 ; Huang, Qingyang 3 ; Fan, Ruifeng 4 ; Wang, Xu 1 ; Feng, Peng 1 ; Zhao, Guangming 1 ; Bian 1 ;
作者机构： 1.Northeast Agr Univ, Coll Life Sci, Lab Plant Res, Harbin 150030, Heilongjiang, Peoples R China
2.Heilongjiang Acad Agr Sci, Virus Free Seedling Res Inst, Harbin 150086, Heilongjiang, Peoples R China
3.Heilongjiang Acad Sci, Inst Nat Resources & Ecol, Harbin 150040, Heilongjiang, Peoples R China
4.Heilongjiang Univ Chinese Med, Minist Educ, Med Key Lab C
期刊名称：SCIENTIFIC REPORTS （ 影响因子：4.379； 五年影响因子：5.133 ）
ISSN： 2045-2322
年卷期： 2018 年 8 卷
页码：
收录情况： SCI
摘要： Dryopteris fragrans (L.) Schott is a fern growing on the surface of hot rocks and lava. It is exposed to sunlight directly and bears local hot environment. We sequenced the complete nucleotide sequence of its chloroplast (cp) genome. The cp genome was 151,978 bp in length, consisting of a large single-copy region (85,332 bp), a small single-copy region (31,947 bp) and a pair of inverted repeats (17,314 bp). The cp genome contained 112 genes and 345 RNA editing sites in protein-coding genes. Simple sequence repeats (SSRs) and long repeat structure pairs (30-55 bp) were identified. The number and percent of repeat structures are extremely high in ferns. Thermal denaturation experiments showed its cp genome to have numerous, dispersed and high GC percent repeat structures, which conferred the strongest thermal stability. This repeat-heavy genome may provide the molecular basis of how D. fragrans cp survives its hot environment.
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