Mutation of an alternative sigma factor in the cyanobacterium Nostoc punctiforme results in increased infection of its symbiotic plant partner, Anthoceros punctatus

被引：33

作者：

Campbell, EL

Brahamsha, B

Meeks, JC

机构：

[1] Univ Calif Davis, Div Biol Sci, Microbiol Sect, Davis, CA 95616 USA

[2] Univ Calif San Diego, Scripps Inst Oceanog, Div Marine Biol Res, La Jolla, CA 92093 USA

来源：

JOURNAL OF BACTERIOLOGY | 1998年 / 180卷 / 18期

关键词：

D O I：

10.1128/JB.180.18.4938-4941.1998

中图分类号：

Q93 [微生物学];

学科分类号：

071005 ; 100705 ;

摘要：

An alternative group 2 sigma factor was identified in the nitrogen-fixing, symbiotically competent cyanobacterium Nostoc punctiforme and designated sigH. Transcription of sigH was specifically induced within 1.5 h following exposure of N. punctiforme to its symbiotic plant partner, Anthoceros punctatus. A mutation in sigH resulted in a sixfold-higher initial infection of A. punctatus tissue without a parallel increase in nitrogen-fixing activity.

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页码：4938 / 4941

页数：4

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