ISOLATION AND PROPERTIES OF BAROPHILIC AND BAROTOLERANT BACTERIA FROM DEEP-SEA MUD SAMPLES

被引：145

作者：

KATO, C

SATO, T

HORIKOSHI, K

机构：

[1] The DEEP STAR Group, Japan Marine Science and Technology Center, Yokosuka, 237

来源：

BIODIVERSITY AND CONSERVATION | 1995年 / 4卷 / 01期

关键词：

BAROPHILIC BACTERIA; BAROTOLERANT BACTERIA; DEEP-SEA; HIGH PRESSURE; BACTERIAL PHYLOGENY;

D O I：

10.1007/BF00115311

中图分类号：

X176 [生物多样性保护];

学科分类号：

090705 ;

摘要：

Several barophilic and barotolerant bacteria were isolated from deep-sea mud samples of Suruga Bay (2485 m depth), the Ryukyu Trench (5110 m depth), and the Japan Trench (land-side 6356 m, and sea-side 6269 m depth, respectively). The barophilic bacteria, strains DB5501, DB6101, DB6705 and DB6906, were able to grow better under high hydrostatic pressures than under atmospheric pressure (0.1 megapascals; MPa). The optimal growth pressures for the barophilic bacteria were approximately 50 MPa at 10 degrees C. The barotolerant strains DSK1 and DSS12 were determined to be psychrophilic, and had optimal growth temperatures of 10 degrees C and 8 degrees C, respectively. The degree of barophily and barotolerance was shown to be very dependent on temperature. For example, at 4 degrees C the barophilic strains were indistinguishable from barotolerant bacteria, whereas at 15 degrees C the barotolerant strains behaved more like the barophilic strains. Based on sequence analysis of 16S ribosomal DNA, all of the strains included in this study belong to the gamma subgroup of the Proteobacteria. Phylogenetic relations between the isolated strains and the known gamma subgroup bacteria suggested that the isolated strains belong to a new sub-branch of this group.

引用

页码：1 / 9

页数：9

共 20 条

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