Metabolic and physiological characteristics of salt-tolerant strains of Bradyrhizobium spp.

被引：3

作者：

Barboza, F ^{[1
]}

Correa, NS ^{[1
]}

Rosas, SB ^{[1
]}

机构：

[1] Univ Nacl Rio Cuarto, Lab Fisiol Vegetal, Dept Ciencias Nat, RA-5800 Rio Cuarto, Cba, Argentina

来源：

BIOLOGY AND FERTILITY OF SOILS | 2000年 / 32卷 / 05期

关键词：

Bradyrhizobium; salt stress; salt tolerance; metabolic characteristics;

D O I：

10.1007/s003740000261

中图分类号：

S15 [土壤学];

学科分类号：

0903 ; 090301 ;

摘要：

Biochemical and physiological characteristics of salt-tolerant (88 mM, 264 mM and 440 mM NaCl) strains of Bradyrhizobium were evaluated according to their capacity for using different carbon sources, growth rate, resistance to antibiotics, plasmid profile and exopolysaccharide production. Salt-tolerant strains significantly enhance their capacity to oxidize C sources (about 75-85 compounds) by increasing growth rate and exopolysaccharide production involved in adhesion, resulting in a greater adapting capacity to colonize unfavorable saline environments. However, salt stress could work as a curing agent and thus the gene stability would become critical for the biological nitrogen-fixation information present in plasmids, as is the case in Rhizobium.

引用

页码：368 / 373

页数：6

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