Invasive effects of the exotic plant *** on soil biogeochemical processes and related microbial community
会议名称：《第三届全国生物入侵大会》
会议日期：2010年
关 键 词：Plant invasion Biogeochemical activity amoA gene nosZ gene
摘 要：Plant invasions have dramatic effects on native ecosystem structure and *** microbial diversity changes during the impacts of exotic plants invasion have been extensively examined,the shifts in diversity will not necessarily explain the ability of soil microbes to perform biogeochemical *** this study,we examined how microbial functional genes,together with their corresponding biogeochemical processes,respond to invasions of the exotic plant ***. Using terminal restriction fragment length polymorphism(T-RFLP),and quantitative polymerase chain reaction(qPCR),we compared the community structure and microbial abundance shifts in the rhizosphere and bulk soil associated with ***,comparing treatments in which it was either growing alone or together with native *** qPCR results showed that abundance of amoA and nosZ gene in the rhizosphere soil of *** changed more in bulk soil of native plants,both in monoculture and grown ***,T-RFLP results also showed that gene diversity shifts were more significant in ***’s rhizosphere *** results indicated that *** influences the belowground ecosystem in part through altered abundance of functional genes,rather than simply through changes in specific ***,the abundance and composition difference of microorganisms in soil could be characterized into significantly correlated factors with the altered storage and activity rates of nutrients in soil,particularly available nutrient and biogeochemical activity. Overall,these results suggest that *** would favor itself with more suitable biogeochemical cycle effects in the soil ecosystem by modifying the microorganism community.