Study on rhizosphere microbial community diversity of different plants grownin the constructed wetland

Rhizosphere microbial community diversity of different plants Phragmites australis, Typha latifolia, and Loliumperenne grown in constructed wetland was studied by plate count methods and PCR-DGGE. The results were as followed.Rhizosphere of different plants was different in community structure and microbial quantity. The microbial quantities inrhizosphere zone were significantly different from those in non-rhizosphere zone (P0.05). Moreover, there were differentcommunity structure and dominant populations between rhizosphere and non-rhizosphere. Phragmites australis rhizospherehad the largest number of common species and species evenness. At the same time, it had the most significant rhizosphereeffect (R/S).The biggest different diversity index between rhizosphere and non-rhizosphere was also in P. australis, whichshowed that it could better influence the enrichment and distribution of soil microbes, and improve the microbialcommunitiy diversity.