黄勤知;余莎;何红;卢乃会;

• 1:广东海洋大学农学院

摘要(Abstract)：

【目的】探索来自红树老鼠簕AiL3菌株抗菌蛋白对杧果炭疽菌的抑制作用,为微生物抗菌活性物质在果蔬防病保鲜中的利用等提供依据。【方法】以杧果炭疽菌为供试病菌,倍比稀释法测定抗菌蛋白对病菌的最小抑菌与杀菌浓度;电镜扫描观测抗菌蛋白对病菌菌丝生长、孢子萌发的抑制作用并拍照;分别用牛津杯、电导率、考马斯亮蓝、试剂盒及蒽酮比色等方法测定抗菌蛋白处理对病菌胞壁几丁质降解、细胞膜透性、可溶性蛋白含量、菌体DNA及糖类含量变化。【结果】抗菌蛋白对病菌的最小抑菌浓度(MIC)和最小杀菌浓度(MBC)分别为30 mg·L-1和60 mg·L-1;抗菌蛋白处理后,病菌菌丝形态表现为肿胀、膨大直至卷曲坍塌破裂,病菌分生孢子出现皱缩、畸形直至消融;病菌细胞膜通透性和体内可溶性蛋白含量明显增加,病菌糖类代谢物质含量随着处理时间的增长表现为峰形变化,先增加后下降;但抗菌蛋白不能降解病菌细胞壁中的几丁质,对病菌DNA也无明显作用。【结论】初步认为该抗菌蛋白对病菌的抑制可能主要是通过破坏病菌细胞膜、干扰病菌蛋白质及糖类物质代谢等起作用。

关键词(KeyWords)： 杧果;红树内生细菌;抗菌蛋白;杧果炭疽菌;抑菌作用

Abstract:

Keywords:

基金项目(Foundation): 广东省科技计划(2012A020602049)

作者(Author): 黄勤知;余莎;何红;卢乃会;

Email:

DOI: 10.13925/j.cnki.gsxb.2013.06.006

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