The 10th Asian Crop Science Association Conference

講演情報

Oral sessions

Field Crop Production » O13: Current Issues on Tropical Crops

[O13] Current Issues on Tropical Crops

*Sponsored by the Japanese Society for Tropical Agriculture / The Society of Sago Palm Studies

2021年9月9日(木) 17:00 〜 19:00 Room 1 (Oral) (Field Crop Production)

Chair: Hiroshi Ehara (Nagoya University, Japan)
Chair: Hitoshi Naito (Kurashiki University of Science and The Arts, Japan)
Chair: Rosa Rolle (Food and Agriculture Organization of the United Nations, Italy)

18:25 〜 18:40

[O13-06] The Abundance and Diversity of Arbuscular Mycorrhizal Fungi Colonized in Roots of Sago Palm in Mineral Soil and Shallow Peat Soil

*Nominated for Presentation Awards

Koki Asano1,2, Willy Vincent Anak Kagong3, Siraj Munir Bin Mohammad3, Kurumi Sakazaki4, Margaret Chan Kit Yok3, Toshiyuki Isoi4, Mana Kano-Nakata5, Hiroshi Ehara5,6 (1.Graduate School of Bioagricultural Sciences, Nagoya University, Japan, 2.Faculty of Agriculture, Kasetsart University, Thailand, 3.Faculty of Plantation and Agrotechnology, Universiti Teknologi MARA Sarawak Branch, Malaysia, 4.Faculty of Agriculture, Meijo University, Japan, 5.International Center for Research and Education in Agriculture, Nagoya University, Japan, 6.Applied Social System Institute of Asia, Nagoya University, Japan)

Arbuscular mycorrhizal fungi (AMF) play an essential role in host plants' nutrient uptakes. In Sarawak, Malaysia, farmers generally cultivate sago palm (Metroxylon sagu) in peat soils without applying chemical fertilizer, expecting natural fertility of the soil. Through such experience, the growth contribution of AMF to sago palm had been suggested. In this study, we collected soils and roots in mineral soil (MS) and shallow peat soil (SPS) in Sarawak to understand the characteristics of AMF symbiosis under different soil environments. As a result, SPS showed a higher moisture content (MS, 38.1; SPS, 79.8%), lower pH (H2O) (MS, 4.6; SPS, 4.1), soil bulk density (MS, 1.03; SPS, 0.20 g cm-3), and N content (MS, 16.9; SPS, 2.7 kg m-3) than MS at the same soil depth, while the P content (Bray II) (MS, 1.6; SPS, 1.9 g P2O5 m-3) was similar. The abundance of AMF was significantly lower in SPS (39.2 ± 12.5 %) than in MS (73.2 ± 4.6 %). 122 AMF operational taxonomic units (OTUs) belonging to Acaulosporaceae, Ambisporaceae, Claroideoglomeraceae, Gigasporaceae, and Glomeraceae were detected by amplicon sequencing of the small-subunit rRNA gene. Phylogenic analysis revealed that OTUs in MS belonged to more clades than in shallow peat soil. It seems that the soil physicochemical properties influenced the abundance and diversity of AMF in SPS. It was suggested that Glomus and Acaulospora species obtained from SPS could survive in acidic and high moisture soil conditions and help the growth of sago palms in shallow peat soil.