天蓝色链霉菌静置液体培养中的分化与厌氧状态
Differentiation and anaerobiosis in standing liquid cultures of Streptomyces coelicolor.
作者信息
van Keulen Geertje, Jonkers Henk M, Claessen Dennis, Dijkhuizen Lubbert, Wösten Han A B
机构信息
Microbial Physiology, Groningen Biomolecular Sciences and Biotechnology Institute (GBB), University of Groningen, Haren, The Netherlands.
出版信息
J Bacteriol. 2003 Feb;185(4):1455-8. doi: 10.1128/JB.185.4.1455-1458.2003.
Abstract
Streptomyces coelicolor differentiates on solid agar media by forming aerial hyphae that septate into spores. We here show that differentiation also occurs in standing liquid minimal media. After a period of submerged growth, hyphae migrate to the air interface, where they become fixed by a rigid reflecting film. Colonies that result from these hyphae form sporulating aerial hyphae. In addition, submerged hyphae in the liquid minimal medium may attach to the surface. Liquid standing cultures easily become anoxic only 1 to 2 mm below the surface. Yet, biomass increases, implying the existence of metabolic pathways supporting anaerobic growth.
摘要
天蓝色链霉菌在固体琼脂培养基上通过形成分隔成孢子的气生菌丝进行分化。我们在此表明，分化也发生在静置的液体基本培养基中。经过一段时间的深层生长后，菌丝迁移到空气界面，在那里它们被一层坚硬的反射膜固定。由这些菌丝形成的菌落会形成产孢气生菌丝。此外，液体基本培养基中的深层菌丝可能会附着在表面。静置培养的液体在表面以下仅1至2毫米处很容易缺氧。然而，生物量却增加了，这意味着存在支持厌氧生长的代谢途径。
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