Quantification and Diversity of Cultivated Bacteria in Root Endosphere and Rhizosphere of Bamboo Species Fargesia nitida in Association with the Tree Succession
Nan Nan Zhang
Chengdu Institute of Biology/ Maoxian Experimental Station of Ecology, Chinese Academy of Sciences, Chengdu 610041, China.
Jun Xiang
College of Life Science, Sichuan Normal University, Chengdu 610101, China.
Lin Luo
Chengdu Institute of Biology/ Maoxian Experimental Station of Ecology, Chinese Academy of Sciences, Chengdu 610041, China.
Danae Rojas Arellano
Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Ciudad de México 11340, Mexico.
Yan Jie Wang
College of Life Science, Sichuan Normal University, Chengdu 610101, China.
Chun Zhang Zhao
State Environmental Protection Key Laboratory of Synergetic Control and Joint Remediation for Soil and Water Pollution, College of Ecology and Environment, Chengdu University of Technology, Chengdu 610059, PR, China.
Fu Sun Shi
Chengdu Institute of Biology/ Maoxian Experimental Station of Ecology, Chinese Academy of Sciences, Chengdu 610041, China.
En Tao Wang
*
Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Ciudad de México 11340, Mexico.
*Author to whom correspondence should be addressed.
Abstract
Fargesia nitida is a cold-resistant evergreen bamboo and is a pioneer plant in the secondary succession after the native trees were destroyed in the eastern Tibetan Plateau. However, little is known about the effects of this plant on soil conditions and about its microbiomes. Aiming at learning the interactions among the soil characteristics, the plants and the microbes in relation to the plant succession, a study on cultivated microbes associated with the rhizocompartments of F. nitida was performed in the present study to reveal the preference of this plant to the root associated microbes, in comparison with that associated with the successive spruce (Picea asperata Mast.) trees. The results demonstrated that growth of F. nitida could improve the soil nutrient contents, especially increasing total nitrogen, NH4+-N, total carbon, and microbial biomass carbon, and maintained more soil bacteria than the successive spruce trees. Based upon the study of F. nitida root-associated cultivated microbial community, the nutrient improvement in F. nitida growing soils might be from the root endophytic bacteria, which presented greater abundance (3.8, 1.7, and 12.6 folds) than that of bacteria in its rhizosphere, root zone soil, and spruce root zone soil, respectively. Pseudomonas members, especially species related to P. baetica and P. vancouverensis, were strongly selected by F. nitida as root endophytes.
Keywords: Bamboo, cultivated microbiome, plant succession, soil, pseudomonas