Microbial Communities and Functions in the Rhizosphere of Disease-Resistant and Susceptible Camellia spp.

Oil tea (Camellia spp.) is endemic to the hilly regions in the subtropics. Camellia yuhsienensis is resistant to diseases such as anthracnose and root rot, while Camellia oleifera is a high-yield species but susceptible to these diseases. We hypothesize that differences in the rhizosphere microbial communities and functions will elucidate the resistance mechanisms of these species. We used high-throughput sequencing over four seasons to characterize the rhizosphere microbiome of C. oleifera (Rhizo-Sus) and C. yuhsienensis (Rhizo-Res) and of the bulk soil control (BulkS). In Rhizo-Res, bacterial richness and diversity (Shannon index) in autumn and winter were both higher than that in Rhizo-Sus. In Rhizo-Res, fungal richness in autumn and winter and diversity in summer, autumn, and winter were higher than that in Rhizo-Sus. The seasonal variations in bacterial community structure were different, while that of fungal community structure were similar between Rhizo-Res and Rhizo-Sus. Gram-positive, facultatively anaerobic, and stress-tolerant bacteria were the dominant groups in Rhizo-Sus, while Gram-negative bacteria were the dominant group in Rhizo-Res. The significant differences in bacterial and fungal functions between Rhizo-Sus and Rhizo-Res were as follows: (1) in Rhizo-Sus, there were three bacterial and four fungal groups with plant growth promoting potentials, such as Brevibacterium epidermidis and Oidiodendron maius, and one bacterium and three fungi with pathogenic potentials, such as Gryllotalpicola sp. and Cyphellophora sessilis; (2) in Rhizo-Res, there were also three bacteria and four fungal groups with plant-growth-promoting potentials (e.g., Acinetobacter lwoffii and Cenococcum geophilum) but only one phytopathogen (Schizophyllum commune). In summary, the rhizosphere microbiome of disease-resistant C. yuhsienensis is characterized by a higher richness and diversity of microbial communities, more symbiotic fungal communities, and fewer pathogens compared to the rhizosphere of high-yield but disease-susceptible C. oleifera. © Copyright © 2021 Li, Zhang, Qu, Luo, Lu, Kuzyakov, Alharbi, Yuan and Niu.

Li J. 1 , Zhang C.1 , Qu X.1 , Luo Z.1 , Lu S.1 , Kuzyakov Y. 2, 3, 4 , Alharbi H.A.5 , Yuan J.1 , Niu G.6
Frontiers Media S.A.
  • 1 Key Laboratory of Cultivation and Protection for Non-Wood Forest Trees, Ministry of Education, Central South University of Forestry and Technology, Changsha, China
  • 2 Department of Agricultural Soil Science, Department of Soil Science of Temperate Ecosystems, Georg-August-Universität Göttingen, Göttingen, Germany
  • 3 Agro-Technological Institute, RUDN University, Moscow, Russian Federation
  • 4 Institute of Environmental Sciences, Kazan Federal University, Kazan, Russian Federation
  • 5 College of Food and Agriculture Sciences, King Saud University, Riyadh, Saudi Arabia
  • 6 Texas AM AgriLife Research and Extension Center at Dallas, Texas AM University, Dallas, TX, United States
Ключевые слова
Camellia oleifera; Camellia yuhsienensis; plant growth promoting microorganisms; rhizosphere microbiome and functions; soilborne phytopathogens
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