Abstract—Rice production in South East Asia is under the threat of climate change such as global warming, which is projected to increase 2°C or more in the late- 20^th -Century (IPCC AR5). In that case, endophytes can be used as the natural-based adaptation tools since they are found obviously in different ecosystems. However, symbiosis activity between the endophytes and their host plant under high temperature is not well known, requiring more elucidation. The purpose of this research is to clarify the symbiotic capacity of endophytic fungi in the early stage of rice growth and to evaluate the impact of high temperature on rice-endophytic symbiosis through the observation of the fungi present in the roots. The symbiosis activity between the Dark Septate Endophytes (DSE) and Koshihikari rice plant under high temperature was tested by comparing Cladophialophora chaetospira (OGR3), Meliniomyces variabilis (J₁PC₁), Phialocephala fortinii (L_tPE₂), Veronaeopsis simplex (Y34) and without colonization under continuous high temperature of 35°C. Root colonization was checked under the microscope and the plant growth parameters such as root/shoot ratio, shoot high, etc., were measured. The colonization capacity of DSE fungi in the roots of rice plant was demonstrated for all the selected species at 35°C. Generally, the root/shoot ratio was increased in all treatments with DSE. However, the root/shoot ration of treatment with Cladophialophora chaetospira (OGR3) and Veronaeopsis simplex (Y34) were highest among the four treatments. Therefore, the selected dark septate endophytic fungi have potential to be used as biofertilizers.
 

Index Terms—symbiosis, dark septate endophytic fungi, rice plant, climate change

Cite: Mai Ei Ngwe Zin, Duyen T. T. Hoang, and Narisawa Kazuhiko, "The Impact of Climate Change on the Symbiosis between the Dark Septate Endophytic Fungi and Koshihikari Rice Plant," Journal of Advanced Agricultural Technologies, Vol. 8, No. 1, pp. 1-6, June 2021. Doi: 10.18178/joaat.8.1.1-6

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