三角梅植株不同部位水提取液抑菌效果研究

Study on the Antibacterial Effect of Extracting Solution From Different Part of Bougainvillea spectabilis Willd Plant

以三角梅植株茎、叶、花为试材,采用最低抑菌浓度试验和测定抑菌圈大小试验,研究茎、叶、花水提取液对大肠杆菌、金黄色葡萄球菌和枯草芽孢杆菌的抑菌效果。结果表明:茎、叶、花水提取物对3种菌均有抑菌效果,通过测定它们的最低抑菌浓度(MIC)及抑菌圈大小可知,三角梅叶水提取液的抑菌效果最好,其次是茎,花的抑菌效果最差。茎、叶水提取液对大肠杆菌的抑菌效果最好,花水提取液对金黄色葡萄球菌的抑菌效果最好。通过不同pH值条件下茎、叶、花水提取液抑菌效果测定,在酸性条件下,水提取液对各菌种的抑菌效果较好。该试验为进一步开发利用三角梅资源,为天然食品防腐保鲜剂的开发提供理论依据。

Using stems,leaves and flowers of Bougainvillea spectabilis Willd plant as test materials,the antibacterial effect of extracting solution from stems,leaves and flowers of Bougainvillea spectabilis Willd plant on E.coli,S.aureus and B.subtilis was studied via the MIC tests and the size of antibacterial circle.The results showed that the extracting solution from stems,leaves and flowers had antibacterial effect,extracting solution from leaves had the best effect and flowers had the worst effect.Effect of extracting solution from stems and leaves on E.coli was better than that from flowers,and effect of extracting solution from flowers on S.aureus was better than that from stems and leaves.Antibacterial effects of extracting solution with different pH values were determined,it had better effect under acidic conditions.This experiment could provide theory evidences for further exploitation of Bougainvilleaspectabilis Willd resources and natural food preservatives.