Abstract: The taxonomic status of a mycorrhizal fungi strain， which could significantly promote blueberry growth， was determined by combined morphological and molecular methods. The inoculation effect of the strain on blueberry growth was studied systematically in physiological and biochemical aspects at different growth stage. Morphological observation of 18S combined with rDNA sequencing results showed that the species is Coprinus micaceus. After inoculating the bacteria， the plant height of blueberry plantlets and acclimated seedlings were 300%， 561% higher than the control， and ratio of diameter to height of the potted seedlings was 3454% higher than the control. The hormone content of blueberry top leaves was 23 times higher than the control; and N， P absorption rate of the blueberry increased significantly by 128% and 153%, respectively. The inoculation of Coprinus micaceus strain can significantly promote the blueberry growth. In conclusion， the strain has a good application prospect， and could be preserved for agricultural production.

Key words: blueberry, mycorrhizal fungi, tissue culture seedling, potted cultivation, growth promoting effect