Xing Xiaoke, Ma Xueting, Men Jinxin, Chen Yanhong, Guo Shunxing
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.
Sci China Life Sci. 2017 May;60(5):536-544. doi: 10.1007/s11427-017-9020-1. Epub 2017 Mar 13.
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.
植物系统发育限制了某些兰花中菌根真菌群落的组成。在此，我们研究了一个生态位中8种石斛属植物的菌根真菌群落结构，以确定菌根真菌群落的相似性是否与宿主植物的系统发育相关，以及石斛属植物与菌根真菌的相互作用在系统发育上是否保守。基于DNA数据构建了8种共存石斛属植物的系统发育树，并通过其根系对菌根真菌群落进行了表征。与8种石斛属植物相关的有31个不同的真菌谱系。总共，82.98%的已鉴定关联属于角担菌科，较小比例涉及未知担子菌门成员（9.67%）。群落分析表明，系统发育相关的石斛属植物倾向于与一组相似的角担菌科真菌相互作用。石斛属植物与角担菌科真菌之间的相互作用受到石斛属植物种间系统发育关系的显著影响。我们的结果提供了证据，表明8种共存石斛属植物的菌根特异性在系统发育上是保守的。
