| Budget Amount *help |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2019: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2018: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2017: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
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| Outline of Final Research Achievements |
To elucidate the effect of environmental stresses on decomposer microbes that have a significant role in ecosystem functions, incubation and field studies were carried out using shiitake mushrooms (Lentinula edodes). We developed a biomass quantification procedure for L. edodes using qPCR. High temperature showed the greatest damage to the biomass and physiological activity of L. edodes compared to other stresses in incubation experiments. Field experiments revealed that the biomass of L. edodes intensively decreased after a hot summer in spite of the fact that its physiological activity remained at a high level, probably due to coverage by other decomposer microbes tolerant to high temperatures. Salt deposits brought by a typhoon also caused a temporary decrease in both biomass and physiological activity. The combination of the type and strength of environmental stresses and the tolerance of microbes to these stresses seemed to control the wood decomposition rate in field conditions.
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