Diversity of root-associated fungi of Rhododendron simsii in subtropical forests: fungal communities with high resistance to anthropogenic disturbances  

作　　者：Yanhua Zhang Fangping Tang Jian Ni Lijia Dong Lifu Sun 

机构地区：[1]College of Life Sciences , Shaoxing University

出　　处：《Journal of Forestry Research》2019年第6期2321-2330,共10页林业研究（英文版）

基　　金：supported by the National Natural Science Foundation of China(31170469 and 31700476);Zhejiang Natural Science Foundation(LY19C030002);the Technology Division of Shaoxing(2017B70061)

摘　　要：Species of the Ericaceae or heath family are widely distribute in continental ecosystems and their special ericoid mycorrhizas(ERM)are considered benefi cial to their survival and persistence in variable habitats.Currently,increasing anthropogenic disturbances and improper forest management are aff ecting subtropical forests of China where these native species located.These activities not only aff ect plant communities above-ground,but also impose pressures on microbial communities below-ground.In this study,rootassociated fungal communities of Rhododendron simsii in four forest types under diff erent anthropogenic disturbances were identifi ed using an Illumina Miseq platform,i.e.,old growth forests,secondary forests with one cutting(SECⅠ),secondary forests with two cuttings(SECⅡ),and Chinesefi r plantations(PLF).Intra-and inter-annual variations were analyzed by comparing samples taken in diff erent seasons and years.The results show that:(1)over 1000 OTUs were found in hair roots with most from the division Ascomycota and Basidiomycota belonging to diff erent functional groups;(2)while there were a few indicator OTUs specifi c to diff erent forest types,seasons and years,the proportion of shared taxa was quite large,accounting for 44.9–79.4%of the total OTUs;(3)signifi cantly positive correlations were found between disturbance sensitivity and temporal variations in common fungal orders,and both in major fungal orders were signifi cantly diff erent among fungal functional groups in which putative and possible ERM fungi were highly resistant to disturbances and low temporal variations.The high disturbance resistance and temporal persistence of putative ERM fungi may be essential for the successful adaptation of R.simsii in disturbed subtropical forests of China.Species of the Ericaceae or heath family are widely distribute in continental ecosystems and their special ericoid mycorrhizas(ERM) are considered beneficial to their survival and persistence in variable habitats. Currently, increasing anthropogenic disturbances and improper forest management are affecting subtropical forests of China where these native species located. These activities not only affect plant communities above-ground, but also impose pressures on microbial communities below-ground. In this study, rootassociated fungal communities of R hododendron simsii in four forest types under different anthropogenic disturbances were identifi ed using an Illumina Miseq platform, i.e., old growth forests, secondary forests with one cutting(SEC Ⅰ), secondary forests with two cuttings(SEC Ⅱ), and Chinesefi r plantations(PLF). Intra-and inter-annual variations were analyzed by comparing samples taken in different seasons and years. The results show that:(1) over 1000 OTUs were found in hair roots with most from the division Ascomycota and Basidiomycota belonging to different functional groups;(2) while there were a few indicator OTUs specific to different forest types, seasons and years, the proportion of shared taxa was quite large, accounting for 44.9–79.4% of the total OTUs;(3) signifi cantly positive correlations were found between disturbance sensitivity and temporal variations in common fungal orders, and both in major fungal orders were signifi cantly different among fungal functional groups in which putative and possible ERM fungi were highly resistant to disturbances and low temporal variations. The high disturbance resistance and temporal persistence of putative ERM fungi may be essential for the successful adaptation of R. simsii in disturbed subtropical forests of China.

关 键 词：RHODODENDRON simsii MYCORRHIZA FUNGAL community DIVERSITY SUBTROPICAL FORESTS Human disturbance 

分 类 号：S[农业科学]