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Article

Spatial Distribution Patterns of Root-Associated Bacterial Communities Mediated by Root Exudates in Different Aged Ratooning Tea Monoculture Systems

by 1,2,3,4, 1,2,3, 1,2,3,4, 1,2,3,4, 4, 1,2,3,4,* and 1,2,3,4,*
1
Key Laboratory of Fujian Province for Agroecological Process and Safety Monitoring, Fujian Agriculture and Forestry University, Fuzhou 35002, China
2
Key Laboratory of Ministry of Education for Crop Genetics/Breeding and Integrative Utilization, Fujian Agriculture and Forestry University, Fuzhou 35002, China
3
College of Life Science, Fujian Agriculture and Forestry University, Fuzhou 35002, China
4
Institute of Agroecological Ecology, Fujian Agriculture and Forestry University, Fuzhou 35002, China
*
Authors to whom correspondence should be addressed.
Int. J. Mol. Sci. 2017, 18(8), 1727; https://doi.org/10.3390/ijms18081727
Received: 16 June 2017 / Revised: 18 July 2017 / Accepted: 4 August 2017 / Published: 8 August 2017
(This article belongs to the Special Issue Plant Microbe Interaction 2017)
Positive plant–soil feedback depends on beneficial interactions between roots and microbes for nutrient acquisition; growth promotion; and disease suppression. Recent pyrosequencing approaches have provided insight into the rhizosphere bacterial communities in various cropping systems. However; there is a scarcity of information about the influence of root exudates on the composition of root-associated bacterial communities in ratooning tea monocropping systems of different ages. In Southeastern China; tea cropping systems provide the unique natural experimental environment to compare the distribution of bacterial communities in different rhizo-compartments. High performance liquid chromatography–electrospray ionization–mass spectrometry (HPLC–ESI–MS) was performed to identify and quantify the allelochemicals in root exudates. A high-throughput sequence was used to determine the structural dynamics of the root-associated bacterial communities. Although soil physiochemical properties showed no significant differences in nutrients; long-term tea cultivation resulted in the accumulation of catechin-containing compounds in the rhizosphere and a lowering of pH. Moreover; distinct distribution patterns of bacterial taxa were observed in all three rhizo-compartments of two-year and 30-year monoculture tea; mediated strongly by soil pH and catechin-containing compounds. These results will help to explore the reasons why soil quality and fertility are disturbed in continuous ratooning tea monocropping systems; and to clarify the associated problems. View Full-Text
Keywords: monoculture; allelochemicals; microbiomes; rhizo-compartments; high-throughput sequence; redundancy analysis (RDA); high performance liquid chromatography-electrospray ionization-mass spectrometry (HPLC–ESI–MS) monoculture; allelochemicals; microbiomes; rhizo-compartments; high-throughput sequence; redundancy analysis (RDA); high performance liquid chromatography-electrospray ionization-mass spectrometry (HPLC–ESI–MS)
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MDPI and ACS Style

Arafat, Y.; Wei, X.; Jiang, Y.; Chen, T.; Saqib, H.S.A.; Lin, S.; Lin, W. Spatial Distribution Patterns of Root-Associated Bacterial Communities Mediated by Root Exudates in Different Aged Ratooning Tea Monoculture Systems. Int. J. Mol. Sci. 2017, 18, 1727. https://doi.org/10.3390/ijms18081727

AMA Style

Arafat Y, Wei X, Jiang Y, Chen T, Saqib HSA, Lin S, Lin W. Spatial Distribution Patterns of Root-Associated Bacterial Communities Mediated by Root Exudates in Different Aged Ratooning Tea Monoculture Systems. International Journal of Molecular Sciences. 2017; 18(8):1727. https://doi.org/10.3390/ijms18081727

Chicago/Turabian Style

Arafat, Yasir, Xiaoya Wei, Yuhang Jiang, Ting Chen, Hafiz S.A. Saqib, Sheng Lin, and Wenxiong Lin. 2017. "Spatial Distribution Patterns of Root-Associated Bacterial Communities Mediated by Root Exudates in Different Aged Ratooning Tea Monoculture Systems" International Journal of Molecular Sciences 18, no. 8: 1727. https://doi.org/10.3390/ijms18081727

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