Chloroplast genome structure and phylogeny of Spiranthes sinensis, an endangered medicinal orchid plant.

ABSTRACT: Spiranthes sinensis is an important medicinal plant of Spiranthes family and is currently in an endangered state. To better guide the systematic classification of S. sinensis, the complete genome of its chloroplast was sequenced and characterized. The complete chloroplast genome is 152,786?bp in length and contains a large single copy (LSC) region of 83,446?bp, a small single copy (SSC) region of 17,938?bp, and two inverted repeat (IR_A and IR_B) regions of 25,701?bp. The genome encodes 132 genes (112 unique genes), including 86 protein-coding genes (78 unique genes), 8 rRNA genes (4 unique genes), and 38 tRNA genes (30 unique genes). The total GC content of plasmid genome is 36.18%. Phylogenetic results indicated that S. sinensis is more closely related to Ludisia discolor, Goodyera schlechtendaliana, Goodyera fumata, and Goodyera procera. The study enriches the plasmid genomic information of S. sinensis and is of great significance for the genetic protection of this species.

SUBMITTER: Fan J 

PROVIDER: S-EPMC7706474 | biostudies-literature | 2019 Sep

REPOSITORIES: biostudies-literature