title: Rhizospheric soil and root endogenous fungal diversity and composition in response to continuous Panax notoginseng cropping practices.
abstract: Rhizosphere and endophytic fungal communities are considered critically important for plant health and soil fertility. In response to continuous cropping, Panax notoginseng becomes vulnerable to attack by fungal pathogens. In the present study, culture-independent Illumina MiSeq was used to investigate the rhizospheric and root endophytic fungi in response to continuous Panax notoginseng cropping practices. The results demonstrated that fungal diversity is increased inside the roots and in rhizospheric. Ascomycota, Zygomycota, Basidiomycota and Chytridiomycota were the dominant phyla detected during the continuous cropping of Panax notoginseng. The fungal diversity in the rhizospheric soil and roots of root-rot P. notoginseng plants are less than that of healthy plants in the same cultivating year, thus showing that root-rot disease also affects the community structure and diversity of rhizospheric and root endophytic fungi. Similarities in the major fungal components show that endophytic fungal communities are similar to rhizospheric soil fungal community based on a specialized subset of organisms. Canonical correspondence analysis on the fungal communities in root-rot rhizospheric from both healthy plants and rotation soils reveals that the soil pH and organic matter have the greatest impact upon the microbial community composition during continuous cropping, whereas soil nutrition status does not significantly affect the fungal community composition in response to continuous cropping practices. In addition, the results suggest that the unclassified genera Leotiomycetes, Cylindrocarpon, Fusarium and Mycocentrospora are shown as the potential pathogens which are responsible for the obstacles in continuous cropping of P. notoginseng. Further exploration of these potential pathogens might be useful for the biological control of continuous cropping of P. notoginseng.
authors.affiliation: Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China; Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, China.
authors.forename: Yong
authors.initials: Y
authors.lastname: Tan
authors.affiliation: Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, China.
authors.forename: Yinshan
authors.initials: Y
authors.lastname: Cui
authors.affiliation: Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, China.
authors.forename: Haoyu
authors.initials: H
authors.lastname: Li
authors.affiliation: Department of Biology, University of Texas Rio Grande Valley, 1201 West University Drive, Edinburg, TX 78539, USA.
authors.forename: Anxiu
authors.initials: A
authors.lastname: Kuang
authors.affiliation: Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, China.
authors.forename: Xiaoran
authors.initials: X
authors.lastname: Li
authors.affiliation: Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, China. Electronic address: weiyunlin18@gmail.com.
authors.forename: Yunlin
authors.initials: Y
authors.lastname: Wei
authors.affiliation: Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, China. Electronic address: jixiuling1023@gmail.com.
authors.forename: Xiuling
authors.initials: X
authors.lastname: Ji
mesh_terms: D000383:Agriculture / Q000379:methods; D044822:Biodiversity; D002681:China; D018556:Crops, Agricultural / Q000382:microbiology; D004271:DNA, Fungal / Q000302:isolation & purification; D060026:Endophytes / Q000145:classification* / Q000235:genetics; D005308:Fertilizers / Q000382:microbiology; D005658:Fungi / Q000145:classification* / Q000235:genetics; D053723:Panax notoginseng / Q000382:microbiology*; D010802:Phylogeny; D010935:Plant Diseases / Q000382:microbiology; D018517:Plant Roots / Q000382:microbiology; D058441:Rhizosphere; D012987:Soil / Q000737:chemistry; D012988:Soil Microbiology
chemical_list: D004271:DNA, Fungal; D005308:Fertilizers; D012987:Soil
keywords: Continuous cropping; Endogenous fungi; P. notoginseng; Rhizospheric