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海洋微藻的无菌化处理及对其生长特性和生化组成的影响

, PP. 177-186

Keywords: 微藻,无菌化,抗生素,生长特征,生化组成

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Abstract:

利用常用抗生素(氨苄青霉素、链霉素、氯霉素和卡那霉素)对4株海洋微藻(1株金藻和3株小球藻)进行了无菌化处理,并对这4株微藻在带菌和无菌培养时的生长特征和生化组成进行了比较。结果表明:中高浓度(≥100mg/dm3)的单种抗生素或抗生素组合可抑制微藻的生长,个别低浓度(50mg/dm3)的抗生素或抗生素组合可促进微藻的生长;氨苄青霉素、链霉素和卡那霉素各200mg/dm3联合使用处理球等鞭金藻,氯霉素100,50,50mg/dm3单独使用分别处理小球藻C95,CV和C146,可获得这4株微藻的无菌藻系;无菌培养的4株海洋微藻的稳定期持续时间由除菌前的4~5d延长到15~20d,藻液悬浮性增强,藻细胞不易老化;除菌后微藻的主要生化成分发生明显变化,球等鞭金藻的叶绿素A、叶黄素和总脂含量显著增加,小球藻C95和CV的总蛋白含量显著增加,3株小球藻的脂肪酸组成如EPA,PUFA等的含量发生显著变化。

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