Some Effects of Cryptomeria japonica Inner Bark Extract on the Growth of Pleurotus ostreatus, and Trichoderma harzianum
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概要
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1. The hot water soluble fraction of the inner back of C. japonica significantly inhibits the growth of T. harzianum when growth is evaluated as either the rate of increase of colony diameter on a semi-defined solid medium, or the rate of mycelial mass production in a semi-defined liquid medium. 2. The mycelial of T. harzianum appears to decrease in proportion to increasing concentrations of the hot water soluble fraction of the inner back of C. japonica when T. harzianum is grown on a commercial substrate used for P. ostreatus. 3. Also, the amount of T. harzianum sporulation appears to decrease in proportion to increasing concentrations of CJX when T. harzianum is grown on a commercial substrate used for P. ostreatus production. 4. The hot water soluble fraction of the inner back of C. japonica significantly increases the time required for P. ostreatus to colonize a commercial substrate used for P. ostreatus production when the concentration of CJX is or exceeds 3.0% of the substrate solution. 5. Also, the time required for P. ostreatus to differentiate basidiomata primordia increases with the concentration of CJX present in a commercial substrate used for P. ostreatus production. The advantage of incorporating a 1.0% solution of CJX into commercial P. ostreatus medium would be both to delay the development of T. harzianum inoculum present in the medium, and to reduce the production of spores in P. ostreatus production areas. However, supplementation of more than a 3.0% CJX solution has been shown to delay detrimentally the time of P. ostreatus primordia initiation. The use of CJX in P. ostreatus production may be limited, but other applications should be considered because fungal growth inhibitory properties were demonstrated.スギ内樹皮の熱水抽出物がヒラタケPleurotus ostreatus及びその害菌トリコデルマTrichpderma harzianumに与える効果を追究し，次の事柄を明らかにした。（1）寒天培地，液体培地では抽出物は両菌の生育を妨げた。前者ではトリコデルマの生育半経について，後者ではヒラタケの菌体量について顕著に抽出物阻害効果が現われた。（2）ヒラタケ生産に使われている木粉・米ぬか培地では抽出物の阻害効果はトリコデルマで顕著にあらわれた。即ち抽出物の添加量を増すと，菌体量，小胞子化量が必ず減少した。ヒラタケでの菌生長量，原基発生所要日数も抽出物の作用をうけるが，低濃度抽出物存在下では，無添加の場合とくらべて著しくは変らなかった。（3）スギ内樹皮抽出物を1％程度含む水でヒラタケ生産用木粉・米ぬか培地を作ると，そこでのヒラタケの胞子形成は若干妨げられ，トリコデルマ菌糸の生長は遅れた。
- 東京大学大学院農学生命科学研究科附属演習林,The Tokyo University Forests,東京大学農学部林産学科,Department of Forest Products, Faculty of Agriculture, University of Tokyoの論文
東京大学大学院農学生命科学研究科附属演習林,The Tokyo University Forests,東京大学農学部林産学科,Department of Forest Products, Faculty of Agriculture, University of Tokyo | 論文
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