Agronomic Traits, Chemical Compositions and Response Ability To Mycorrhizal Fungi of Two Dendrobium officinale Phenotypes / 中国药学杂志

ABSTRACT

OBJECTIVE: To provide scientific basis for variety evaluation and selection of Dendrobium officinale. METHODS: The agronomic traits of D. officinale were measured. The chemical compositions of D. officinale stem were analyzed. The dynamic changes of plant biomass and chemical composition content during mycorrhizal cultivation with M2 (Mycena sp.)were observed. RESULTS: There were significant differences between D. officinale phenotype A and B in stem length, internode length, leaf width and leaf shape index (P<0.05), and in the content of polysaccharide and ethanol soluble extract (P<0.05). Moreover, the contents of 4, 4'-dihydroxy-3, 5-dimethoxybibenzyl and 3, 4'-dihydroxy-5-methoxybibenzyl were always very different between phenotype A and B during plant growth. After 12 months of growth, the stem dry weight and plant dry weight of M-A group were significantly higher than those of CK-A group(P<0.01), increasing by 37.6% and 37.3%, respectively. The contents of polysaccharide and six marker compounds of M-A group were increased by 36.8% and 5%-50% than those in CK-A group, respectively. After 12 months of growth, the contents of polysaccharide and six marker compounds of M-B group were increased by 16.7% and 25%-170% than those in CK-B group, respectively. CONCLUSION: The bibenzyl content and the response ability to mycorrhizal fungi M2 of D. officinale phenotype A and B are different.