CHEMOTACTIC BEHAVIOR OF AZOTOBACTER-VINELANDII

被引：5

作者：

HANELINE, S ^{[1
]}

CONNELLY, CJ ^{[1
]}

MELTON, T ^{[1
]}

机构：

[1] N CAROLINA STATE UNIV, DEPT MICROBIOL, RALEIGH, NC 27650 USA

来源：

APPLIED AND ENVIRONMENTAL MICROBIOLOGY | 1991年 / 57卷 / 03期

关键词：

D O I：

10.1128/AEM.57.3.825-829.1991

中图分类号：

Q81 [生物工程学（生物技术）]; Q93 [微生物学];

学科分类号：

071005 ; 0836 ; 090102 ; 100705 ;

摘要：

Chemotaxis was exhibited by Azotobacter vinelandii motile cells. Exposure of cells to sudden increases in attractant concentration suppressed the frequency of tumbling and resulted in smooth swimming. Cells responded chemotactically to a chemical gradient produced during metabolism. Motility occurred over a temperature range of 25 to 37-degrees-C with an optimum pH range of between pH 7.0 and 8.0. The average speed of motile cells was determined to be 74-mu-m/s or 37 body lengths per s. The speed of cells appeared to increase as a function of attractant concentration. Chemotactic systems for fructose, glucose, xylitol, and mannitol were inducible. A. vinelandii exhibited chemotaxis for a number of compounds, including hexoses, hexitols, pentitols, pentoses, disaccharides, and amino sugars. We conclude from these studies that A. vinelandii exhibits a temporal chemotactic sensing system.

引用

页码：825 / 829

页数：5

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