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首页> 外文期刊>Phycological Research >Growth promoting and inhibiting effects of extracellular substances of soil microalgae and cyanobacteria on Escherichia coli and Micrococcus luteus.
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Growth promoting and inhibiting effects of extracellular substances of soil microalgae and cyanobacteria on Escherichia coli and Micrococcus luteus.

机译：土壤微藻类和蓝细菌胞外物质对大肠杆菌和黄褐微球菌的生长促进和抑制作用。

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摘要

Different taxa of chlorophycean, trebouxiophycean and xanthophycean soil microalgae and of cyanobacteria have been tested for the release of substances that inhibit the growth of either Echerichia coli (Migula) Castellani et Chalmersor Micrococcus luteus (Schroeter) Cohn. Experiments suggest two types of antibacterial effects: one type is constitutive; that is, the antibacterial activity is always present in the algal culture medium, as is the case with the Chroococcus turgidus (medium that inhibits the growth of Escherichia coli). The other type is induced; that is, the antibacterial activity occurs only when algae are in contact with bacteria. This is the case when growth of Micrococcus luteus is inhibited in co-culture with Chroococcus turgidus (Kutzing) Nageli or with Xanthonema debile (Vischer) Silva and when growth of Escherichia coli is inhibited in co-culture with Tetracystis sp. As well as inhibition, promotion of bacterial growth was observed. This was probably an unspecific effect resulting from soluble organic and inorganic substances, such as carbohydrates, that are generally present in algal cultures..
机译：已测试了不同种类的叶绿素，藻红藻和黄藻土壤微藻类和蓝细菌的释放，以释放抑制大肠杆菌（Migula）Castellani et Chalmersor Micrococcus luteus（Schroeter）Cohn生长的物质。实验表明两种类型的抗菌作用：一种是组成型的;另一种是组成型的。就是说，藻类培养基中总是存在抗菌活性，而曲霉菌（Chroococcus turgidus）（抑制大肠杆菌生长的培养基）就是这种情况。另一种类型是感应的。即，仅当藻类与细菌接触时才产生抗菌活性。当与turgidus Churgococcus Turgidus（Kutzing）Nageli或与Xanthonema debile（Vischer）Silva共同培养时，黄褐微球菌的生长受到抑制，而与Tetracystis sp。除了抑制作用，还观察到细菌生长的促进。这可能是藻类培养物中通常存在的可溶性有机和无机物质（例如碳水化合物）引起的非特异性效应。

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