The role of cyanobacterial exopolysaccharides in structuring desert microbial crusts

被引：302

作者：

Mazor, G ^{[1
]}

Kidron, GJ ^{[1
]}

Vonshak, A ^{[1
]}

Abeliovich, A ^{[1
]}

机构：

[1] BEN GURION UNIV NEGEV, JACOB BLAUSTEIN INST DESERT RES, IL-84993 SEDE BOQER, ISRAEL

来源：

FEMS MICROBIOLOGY ECOLOGY | 1996年 / 21卷 / 02期

关键词：

cyanobacteria; Microcoleus; microbial crust; exopolysaccharides;

D O I：

10.1111/j.1574-6941.1996.tb00339.x

中图分类号：

Q93 [微生物学];

学科分类号：

071005 ; 100705 ;

摘要：

Microbial crusts are present on surfaces of soils throughout the world. A key feature of these crusts in arid zones is the abundance of filamentous sheath-forming and polysaccharide-excreting cyanobacteria. Several isolates of cyanobacteria were prepared from crust samples (Nizzana sand dunes, north-western Negev Desert, Israel). Optimal growth conditions for two such isolates of Microcoleus sp. were defined, and the role of the excreted polysaccharides in affecting the hydrological properties of crust-covered sand dunes was studied. Experiments with the native crust microbial population demonstrated the possibility of net primary productivity at both high relative air humidities and low moisture content.

引用

页码：121 / 130

页数：10

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[No title captured]

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