ISSN:
1432-0789
Keywords:
Rhizobia
;
Effective N2-fixation
;
Osmotic pressure
;
Symbiosis
;
Glycine max
;
Rhizobium fredii
;
Rhizobium japonicum
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
,
Geosciences
,
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
Notes:
Summary Physiological and symbiotic characteristics were identified in Rhizobium fredii isolated from subtropical-tropical soils. The generation times of R. fredii Taiwan isolated-SB 357 and -SB 682 were 1.7 and 2.5 h, respectively. These strains were associated with acid production in yeast-extract mannitol medium. They were able to use hexoses, pentose, sucrose, trehalose and raffinose. Strain SB 357 can resist a high concentration of kanamycin (100 μg ml−1 and penicillin (400 μg ml−1). It can tolerate up to 2.34% NaCl and 1031.3 mosmol kg−1 (23.4 bars). The growth rate of R. fredii SB 357 under the concentration of approximately 450 mosmol kg−1 (10.2 bars) was not affected by salinity, but responded to osmotic pressure. Both strains (SB 357 and SB 682) isolated from subtropical-tropical soils were able to form an effective N2-fixing symbiosis with the US soybean cv Clark lanceolate leaflet.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00262145
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