Transfer of plasmid RP4 in the spermosphere and rhizosphere of barley seedling

被引:35
作者
Sorensen, SJ [1 ]
Jensen, LE [1 ]
机构
[1] Univ Copenhagen, Inst Mol Biol, Dept Gen Microbiol, DK-1307 Copenhagen K, Denmark
来源
ANTONIE VAN LEEUWENHOEK INTERNATIONAL JOURNAL OF GENERAL AND MOLECULAR MICROBIOLOGY | 1998年 / 73卷 / 01期
关键词
spermosphere; rhizosphere; bulk soil; gene transfer; seed coating;
D O I
10.1023/A:1000661115753
中图分类号
Q93 [微生物学];
学科分类号
071005 ; 100705 ;
摘要
Transfer of plasmid RP4 to indigenous bacteria in bulk soil could only be detected in soil with nutrient amendment. Lack of physiological active donor and recipient cells was apparently one of the limiting factors in un-amended bulk soil. Plasmid transfer was detected both in the spermosphere and rhizosphere of barley seedlings. Transfer occured from seed coated donor bacteria (i) to introduced recipient bacteria and (ii) to indigenous bacteria present in soil. Plasmid transfer was also detected from donor bacteria introduced to the soil to seed coated recipient bacteria. Transfer efficiencies in the rhizosphere were significantly below the transfer efficiencies obtained in the spermosphere. The transfer efficiencies detected in the barley spermosphere were among the highest reported from any natural environment.
引用
收藏
页码:69 / 77
页数:9
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