楠木心材提取物的抑菌活性

Antibacterial activity of heartwood extractives of Phoebe zhennan

运用生长速率法测定分析楠木心材不同试剂提取物对云芝(白腐菌)和密粘褶菌(褐腐菌)生长的抑制作用,以探究楠木心材的抑菌、耐腐能力。结果表明:楠木心材6种试剂提取物对云芝的抑制作用强弱为甲醇提取物>丙酮提取物>三氯甲烷提取物>石油醚提取物>乙酸乙酯提取物>蒸馏水提取物,其中甲醇提取物的EC50值最低,为0.935 2 g·L-1,因此楠木心材提取物抑制云芝的最适试剂为甲醇;楠木心材6种试剂提取物对密粘褶菌都有不同程度的抑制作用,其作用强弱为甲醇提取物>丙酮提取物>三氯甲烷提取物>乙酸乙酯提取物>石油醚提取物>蒸馏水提取物,其中甲醇提取物的EC50值最低,为0.403 0 g·L-1,因此楠木心材提取物对密粘褶菌抑制作用最强的是甲醇提取物。

The inhibiting effects of different solvents extractives of Phoebe zhennan heartwood on Trametes versicolor （white rot fungi） and Gloeophyllum trabeum （brown rot fungi） were analyzed by the growth rate method to thoroughly investigate the antibacterial and corrosion resisting performance.The result showed that all the six kinds of extractives′ antibacterial effects against T.versicolor can be arranged in order： methanol〉acetone〉chloroform〉mineral ether〉ethyl acetate〉distilled water.Among them, methanol extracts was the most effective in resisting T.versicolor as the EC50 was the lowest in a value of 0.935 2 g·L-1.And all the six extracts had different degrees of antibacterial effects against G.trabeum in an order of methanol〉acetone〉chloroform〉ethyl acetate〉mineral ether〉distilled water.All of them, the EC50 of methanol extracts was the lowest in a value of 0.403 0 g·L-1 suggesting methanol extracts was the most effective in resisting G.trabeum.