假空泡 pseudovacuole,gas vacuole
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见于蓝藻类某些特定种〔腔球藻属(Coelosp-haerium),鱼腥藻属( Anabaena)等〕的微细结构。用显微镜观察,在低倍下呈小黑点;在高倍下为显有红色的颗粒。如果大量存在,则可完全覆盖于其它的细胞内容物上。假空泡是由缺氧时呼吸所出现的气体贮留,藻体往往借此而上浮。
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