BRADYRHIZOBIUM-JAPONICUM SUBSPECIES (USDA-110 AND USDA-26) CHARACTERIZED BY FIXED-NITROGEN UPTAKE AND SYMBIOTIC INDOLEACETIC-ACID PRODUCTION

被引：5
作者：
KANESHIRO, T
NICHOLSON, JJ
机构：
[1] U.S. Department of Agriculture, Plant Biochemistry Research, Northern Regional Research Center, Agricultural Research Service, Peoria, 61604, IL
来源：
CURRENT MICROBIOLOGY | 1990年 / 20卷 / 06期
关键词：
D O I：
10.1007/BF02095864
中图分类号：
Q93 [微生物学];
学科分类号：
071005 ; 100705 ;
摘要：
Two dissimilar subspecies of Bradyrhizobium japonicum (USDA 110 and 26) differ in ammonia (NH3) assimilation and symbiotic indoleacetic acid (IAA) production. Free-living cultures of type-strain USDA 26 grow on NH3 as a sole N source and take up an NH3 analog, methylamine, whereas USDA strain 110 does neither. Although both strains nodulate soybean effectively, root nodules infected with symbiont 26 contain 0.3-1.1 μg IAA per gram fresh weight. Nodules infected by tryptophan catabolic variants 4b and 20d, derived from strain 26, also elicit an increased IAA content, two- to fourfold (2.0-3.9 μg · g-1). In contrast, nodules infected with the dissimilar subspecies (strains 110 and 123) contain significantly less IAA. © 1990 Springer-Verlag New York Inc.
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页码：381 / 385
页数：5
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