The Dendrobium catenatum Lindl. genome sequence provides insights into polysaccharide synthase, floral development and adaptive evolution

Guo Qiang Zhang, Qing Xu, Chao Bian, Wen Chieh Tsai, Chuan Ming Yeh, Ke Wei Liu, Kouki Yoshida, Liang Sheng Zhang, Song Bin Chang, Fei Chen, Yu Shi, Yong Yu Su, Yong Qiang Zhang, Li Jun Chen, Yayi Yin, Min Lin, Huixia Huang, Hua Deng, Zhi Wen Wang, Shi Lin ZhuXiang Zhao, Cao Deng, Shan Ce Niu, Jie Huang, Meina Wang, Guo Hui Liu, Hai Jun Yang, Xin Ju Xiao, Yu Yun Hsiao, Wan Lin Wu, You Yi Chen, Nobutaka Mitsuda, Masaru Ohme-Takagi, Yi Bo Luo, Yves Van De Peer, Zhong Jian Liu

Research output: Contribution to journalArticlepeer-review

118 Citations (Scopus)

Abstract

Orchids make up about 10% of all seed plant species, have great economical value, and are of specific scientific interest because of their renowned flowers and ecological adaptations. Here, we report the first draft genome sequence of a lithophytic orchid, Dendrobium catenatum. We predict 28,910 protein-coding genes, and find evidence of a whole genome duplication shared with Phalaenopsis. We observed the expansion of many resistance-related genes, suggesting a powerful immune system responsible for adaptation to a wide range of ecological niches. We also discovered extensive duplication of genes involved in glucomannan synthase activities, likely related to the synthesis of medicinal polysaccharides. Expansion of MADS-box gene clades ANR1, StMADS11, and MIKC ∗, involved in the regulation of development and growth, suggests that these expansions are associated with the astonishing diversity of plant architecture in the genus Dendrobium. On the contrary, members of the type I MADS box gene family are missing, which might explain the loss of the endospermous seed. The findings reported here will be important for future studies into polysaccharide synthesis, adaptations to diverse environments and flower architecture of Orchidaceae.

Original languageEnglish
Article number19029
JournalScientific reports
Volume6
DOIs
Publication statusPublished - 2016 Jan 12

All Science Journal Classification (ASJC) codes

  • General

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