Impact of plasmid pQBR103 acquisition and carriage on the phytosphere fitness of Pseudomonas fluorescens SBW25: Burden and benefit

被引：45

作者：

Lilley, AK ^{[1
]}

Bailey, MJ ^{[1
]}

机构：

[1] NERC,INST VIROL & ENVIRONM MICROBIOL,MOL MICROBIAL ECOL LAB,OXFORD OX1 3SR,ENGLAND

来源：

APPLIED AND ENVIRONMENTAL MICROBIOLOGY | 1997年 / 63卷 / 04期

关键词：

D O I：

10.1128/AEM.63.4.1584-1587.1997

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：

The phytosphere population densities of Pseudomnas fluorescens SBW25EeZY6KX (lac ZX aph xylE) carrying pQBR103 (Hg-r Tra(+), 330 kbp) declined significantly relative to plasmid-free populations after seed inoculation. As the sugar beet plants matured, ca. 100 days after planting, simultaneous selections for plasmid-carrying hosts were observed in the phyllospheres and rhizospheres of field-grown plants. The recovery of these populations to densities indistinguishable from the densities of plasmid-free inocula (4 x 10(5) CFU/g in the rhizosphere) demonstrates that phytosphere-associated plasmids confer a specific fitness advantage to host bacteria.

引用

页码：1584 / 1587

页数：4

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