title: Phylogenetic constrains on mycorrhizal specificity in eight Dendrobium (Orchidaceae) species.
abstract: Plant phylogeny constrains orchid mycorrhizal (OrM) fungal community composition in some orchids. Here, we investigated the structures of the OrM fungal communities of eight Dendrobium species in one niche to determine whether similarities in the OrM fungal communities correlated with the phylogeny of the host plants and whether the Dendrobium-OrM fungal interactions are phylogenetically conserved. A phylogeny based on DNA data was constructed for the eight coexisting Dendrobium species, and the OrM fungal communities were characterized by their roots. There were 31 different fungal lineages associated with the eight Dendrobium species. In total, 82.98% of the identified associations belonging to Tulasnellaceae, and a smaller proportion involved members of the unknown Basidiomycota (9.67%). Community analyses revealed that phylogenetically related Dendrobium tended to interact with a similar set of Tulasnellaceae fungi. The interactions between Dendrobium and Tulasnellaceae fungi were significantly influenced by the phylogenetic relationships among the Dendrobium species. Our results provide evidence that the mycorrhizal specificity in the eight coexisting Dendrobium species was phylogenetically conserved.
authors.affiliation: Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100193, China. xkxing2009@hotmail.com.
authors.forename: Xiaoke
authors.initials: X
authors.lastname: Xing
authors.affiliation: Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100193, China.
authors.forename: Xueting
authors.initials: X
authors.lastname: Ma
authors.affiliation: Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100193, China.
authors.forename: Jinxin
authors.initials: J
authors.lastname: Men
authors.affiliation: Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100193, China.
authors.forename: Yanhong
authors.initials: Y
authors.lastname: Chen
authors.affiliation: Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100193, China. sxguo@implad.ac.cn.
authors.forename: Shunxing
authors.initials: S
authors.lastname: Guo
mesh_terms: D001487:Basidiomycota / Q000145:classification / Q000235:genetics / Q000502:physiology; D031667:Dendrobium / Q000145:classification / Q000235:genetics / Q000382:microbiology*; D058507:Host Specificity / Q000235:genetics; D038821:Mycorrhizae / Q000145:classification / Q000235:genetics / Q000502:physiology*; D010802:Phylogeny; D018517:Plant Roots / Q000235:genetics / Q000382:microbiology; D017422:Sequence Analysis, DNA / Q000379:methods; D013045:Species Specificity; D013559:Symbiosis
keywords: fungal community composition; mycorrhizal network; orchid mycorrhiza; phylogenetic conservatism