北海道十勝畑土壌から単離したインゲン根粒菌の施肥硝酸態窒素適応性

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Twelve strains of Rhizobiurn sp. (Phaseolus) isolated from different soils in Tokachi, Japan, were inoculated to common bean (Phaseolus vulgaris L. ) cv. Hokkaikintoki cultured on artificial vermiculite with liquid medium of different NO_3^--N levels. When high (30 ppm N) and low (5 ppm N) levels of NO_3^--N were supplied, the difference of each parameter was related to that nodule number : both 2.0 times; dry weight per one nodule : 1.8 and 2.7 times ; acetylene reduction activity (ARA) : 3.8 and 4.8 times ; specific ARA : 4.0 and 3.3 times, respectively. The differences of plant growth and plant nitrogen concentration were not beyond 2.0 times. The species of four beneficial strains, NOKO-313 had stable and high nitrogen fixation ability (NFA) regardless of NO_3^--N concentration, NOKO-311 indicated high NFA though its activity was not inhibited by high NO_3^-N level, NOKO-312 had medium NFA and its activity declined quickly during the symbiotic period with common bean, and NOKO-314 formed many nodules under low NO_3^--N level, were identified using phenotypic and genotypic characteristics. Two strains, NOKO-312 (DDBJ Accession No. AB008310) and NOKO-313 (AB008311), belonged to Rhizobium etli, and the other two, NOKO-311 (AB008309) and NOKO-314 (AB008312) were R. legurninosarum by. phaseoil. Another beneficial strain, NOKO-301 (AB008308) isolated from Andosol soil in Fuchu, Japan, belonged to Rhizobiurn etli.
社団法人日本土壌肥料学会の論文
1998-10-05

北海道十勝畑土壌から単離したインゲン根粒菌の施肥硝酸態窒素適応性

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