Rhizocompartments and environmental factors affect microbial composition and variation in native plants

Myung-Suk Kang; Moonsuk Hur; Soo-Je Park

doi:10.1007/s12275-019-8646-1

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Rhizocompartments and environmental factors affect microbial composition and variation in native plants: Myung-Suk Kang ¹, Moonsuk Hur ², Soo-Je Park ³; Journal of Microbiology 2019;57(7):550-561.
DOI: https://doi.org/10.1007/s12275-019-8646-1
Published online: June 27, 2019

¹Biological Resources Utilization Department, National Institute of Biological Resources, Incheon 22689, Republic of Korea, ²Microorganism Resources Division, National Institute of Biological Resources, Incheon 22689, Republic of Korea, ³Department of Biology, Jeju National University, Jeju 63243, Republic of Korea¹Biological Resources Utilization Department, National Institute of Biological Resources, Incheon 22689, Republic of Korea, ²Microorganism Resources Division, National Institute of Biological Resources, Incheon 22689, Republic of Korea, ³Department of Biology, Jeju National University, Jeju 63243, Republic of Korea

Corresponding author: Soo-Je Park , Tel: +82-64-753-3524;,

Received: 27 November 2018 • Revised: 24 January 2019 • Accepted: 30 January 2019

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Abstract

Molecular analysis based on large-scale sequencing of the plant microbiota has revealed complex relationships between plants and microbial communities, and environmental factors such as soil type can influence these relationships. However, most studies on root-associated microbial communities have focused on model plants such as Arabidopsis, rice or crops. Herein, we examined the microbiota of rhizocompartments of two native plants, Sedum takesimense Nakai and Campanula takesimana Nakai, using archaeal and bacterial 16S rRNA gene amplicon profiling, and assessed relationships between environmental factors and microbial community composition. We identified 390 bacterial genera, including known plant-associated genera such as Pseudomonas, Flavobacterium, Bradyrhizobium and Rhizobium, and uncharacterized clades such as DA101 that might be important in root-associated microbial communities in bulk soil. Unexpectedly, Nitrososphaera clade members were abundant, indicating functional association with roots. Soil texture/type has a greater impact on microbial community composition in rhizocompartments than chemical factors. Our results provide fundamental knowledge on microbial diversity, community and correlations with environmental factors, and expand our understanding of the microbiota in rhizocompartments of native plants.

Keywords: plant microbiota;rhizocompartments;environmental factors;next-generation sequencing;archaea;bacteria

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Rhizocompartments and environmental factors affect microbial composition and variation in native plants

J. Microbiol. 2019;57(7):550-561. Published online June 27, 2019

DOI: https://doi.org/10.1007/s12275-019-8646-1

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