Community Structure and Functional Groups of Fungi in the Roots Associated with var. in the Hulunbuir Sandy Land

WEI Xiaoshuai1, GUO Mishan1, GAO Guanglei1,2,†, REN Yue1, DING Guodong1,2, ZHANG Ying1

1. School of Soil and Water Conservation, Key Laboratory of State Forestry and Grassland Administration on Soil and Water Conservation, Beijing Forestry University, Beijing 100083; 2. Yanchi Ecology Research Station of the Mu Us Desert,

Wuzhong 751500; † Corresponding author, E-mail: gaoguanglei@bjfu.edu.cn Abstract To reveal the fungal community structure and functional groups in the roots associated with P. sylvestris, natural forest and different-aged plantations were analyzed using field investigation and molecular biotechnology in the Hulunbuir Sandy Land. 520 fungal OTUS were obtained from root tip samples of P. sylvestris, and belonged to 197 genera, 87 families, 5 phyla. Basidiomycota and Ascomycota had higher relative abundances, accounted for 54.98% and 39.27% respectively. The dominant bacteria in natural forest were Geminibasidium, Russula and Phialocephala, whereas the dominant bacteria in plantation were Suillus, Phialocephala and Tricholoma. Further, the relative abundance of other bacteria fluctuated with the stand age. The α diversity index of fungi in the roots of P. sylvestris plantation decreased gradually with the increasing of stand age. Among the different stands, the fungal diversity in the roots of mature forest was significantly lower than that in near-mature and middle-aged plantations as well as natural forest (P<0.05). Although the fungal community composition associated with P. sylvestris natural forest and plantations had stable variability, and near-mature forest is the