DISTRIBUTION OF ACTINOMYCETES IN NEAR-SHORE TROPICAL MARINE-SEDIMENTS
DISTRIBUTION OF ACTINOMYCETES IN NEAR-SHORE TROPICAL MARINE-SEDIMENTS
复制标题
DOI：
10.1128/aem.57.4.1102-1108.1991
复制
发表时间：
1991-04-01
影响因子：
4.4
通讯作者：
FENICAL, W
中科院分区：
文献类型：
--
作者：
JENSEN, PR;DWIGHT, R;FENICAL, W
从巴哈马全岛15个岛屿的近岸海洋沉积物中分离到放线菌。共观察到289个放线菌菌落，除6个外，其余均可归为放线菌和链霉菌属上的类群。放线菌种群随深度呈双峰型分布，最大数量出现在浅层和深层采样点。这种分布可以归因于链霉菌的迅速减少和放线菌随深度的增加而增加，这与从海洋来源分离的放线菌来自陆地的理论不符。对分离的63株放线菌进行了海水对其生长的影响试验。链霉菌在非盐基中的生长比在海水中的生长减少39%。放线菌生长几乎需要海水，这是放线菌在海洋环境中具有生理活性的证据。文中还讨论了海洋沉积物中放线菌计数所遇到的问题。
Actinomycetes were isolated from near-shore marine sediments collected at 15 island locations throughout the Bahamas. A total of 289 actinomycete colonies were observed, and all but 6 could be assigned to the suprageneric groups actinoplanetes and streptomycetes. A bimodal distribution in the actinomycete population in relation to depth was recorded, with the maximum numbers occurring in the shallow and deep sampling sites. This distribution can be accounted for by a rapid decrease in streptomycetes and an increase in actinoplanetes with increasing depth and does not conform to the theory that actinomycetes isolated from marine sources are of terrestrial origin. Sixty-three of the isolated actinomycetes were tested for the effects of seawater on growth. Streptomycete growth in nonsaline media was reduced by 39% compared with that in seawater. The actinoplanetes had a near obligate requirement of seawater for growth, and this is presented as evidence that actinomycetes can be physiologically active in the marine environment. Problems encountered with the enumeration of actinomycetes in marine sediments are also discussed.