Correlations between the Phylogenetic Relationship of 14 Tulasnella Strains and Their Promotion Effect on Dendrobium crepidatum Protocorm

The compatibility of mycorrhizal fungi with the early growth stage orchids is essential for their growth. In this study, and promotion effects 14 Tulasnella strains from different hosts were studied by co-culturing them protocorms Dendrobium crepidatum, which has high ornamental economic value in China. ITS–LSU–SSU–TEF combined sequence analysis divided into three clades belonging to calospora (clades A B) asymmetrica (clade C). All compatible D. crepidatum within 90 d co-culture. Strain T12 Clade had a significantly higher (p < 0.05) effect on biomass morphology strain T13 C lower than other strains. Through morphological principal component analysis, we constructed hierarchical cluster tree, was consistent phylogenetic tree these at clade level. Orthogonal partial least squares-discriminant showed that have an important plant height, root number, length crepidatum. findings study will contribute identification strains, conservation resources, commercial utilization technology.