Effect of Rice Cultivation Systems on Indigenous Arbuscular Mycorrhizal Fungal Community Structure

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概要

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• Arbuscular mycorrhizal fungi (AMF) in an agricultural ecosystem are necessary for proper management of beneficial symbiosis. Here we explored how the patterns of the AMF community in rice roots were affected by rice cultivation systems (the system of rice intensification [SRI] and the conventional rice cultivation system [CS]), and by compost application during growth stages. Rice plants harvested from SRI-managed plots exhibited considerably higher total biomass, root dry weight, and seed fill than those obtained from conventionally managed plots. Our findings revealed that all AMF sequences observed from CS plots belonged (only) to the genus Glomus, colonizing in rice roots grown under this type of cultivation, while rice roots sown in SRI showed sequences belonging to both Glomus and Acaulospora. The AMF community was compared between the different cultivation types (CS and SRI) and compost applications by principle component analysis. In all rice growth stages, AMF assemblages of CS management were not separated from those of SRI management. The distribution of AMF community composition based on T-RFLP data showed that the AMF community structure was different among four cultivation systems, and there was a gradual increase of Shannon-Weaver indices of diversity (H') of the AMF community under SRI during growth stages. The results of this research indicated that rice grown in SRI-managed plots had more diverse AMF communities than those grown in CS plots.

著者

• Teaumroong Neung

  School Of Biotechnology Institute Of Agricultural Technology Suranaree University Of Technology

• Boonkerd Nantakorn

  School Of Biotechnology Institute Of Agricultural Technology Suranaree University Of Technology

• Young J.

  Department Of Surgery Mcmaster University

• Tittabutr Panlada

  School Of Biotechnology Institute Of Agricultural Technology Suranaree University Of Technology

• LONGTONGLANG Aphakorn

  School of Biotechnology, Institute of Agricultural Technology, Suranaree University of Technology

• WATANAROJANAPORN NANTIDA

  School of Biotechnology, Institute of Agricultural Technology, Suranaree University of Technology

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