Response of Lee Soybeans to Different Strains of Rhizobium japonicum<sup>1</sup>

Abel, G. H.; Erdman, Lewis W.

doi:10.2134/agronj1964.00021962005600040015x

Cited by 66 publications

(40 citation statements)

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“…The highest seed yield was obtained with strain USDA 110. It has been previously reported that this strain has high capacity of N2-fixation which results in increasing the seed yield of soybean (Abel and Erdman, 1964;Sloger, 1969;Vest, 1971).…”

Section: Resultsmentioning

confidence: 92%

Persistence and competitiveness of threeBradyrhizobium japonicum inoculant strains in clay loam Nile valley soil

1988

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The survival and persistence of three B. japonicum inoculant strains USDA 110, USDA 138 and TAL 379 were studied in a clay loam Nile valley soil. The inoculated field plots in the summer of 1985 were sown with soybean again in 1986 season. No inoculation in the season of 1986 was conducted and the plants were left to nodulate with the persisted cells of the inocula strains applied a year before. The soil had no background of B.japonicum, however, some nodules were formed on the control plants due to the carryover of the strains with water circulation and some other agricultural practices.The results indicate the persistence of all applied inoculant strains until the next planting season in 1986 with strain USDA 110 being higher in the rhizosphere of the plants than the other two strains. The population dynamics of the three strains in both growing seasons followed the same trend with maximum rhizosphere colonization at blooming stage. While strain USDA 110 was as high in 1986 season as in 1985 season, the counts of both strains USDA 138 and TAL 379 were much lower in 1986 season.The significant response to inoculation recorded in the 1985 season was extended to the 1986 growing season. Although nodulation and seed yield still differed significantly in 1986 season from the control uninoculated plots, no significant differences were found among the strains or their mixtures.The results of the competition between the strains in the two seasons showed that strain USDA 110 was more competitive than strains USDA 138 and TAL 379. The competition patterns in the second season were not markedly different from those of the first season. The predominance of strain USDA 110 in nodules was not correlated with a numerical advantage of that strain over other strains in the host rhizosphere.

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Section: Resultsmentioning

confidence: 92%

Persistence and competitiveness of threeBradyrhizobium japonicum inoculant strains in clay loam Nile valley soil

1988

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“…Two other cheaters that obtained less benefit from symbiosis (light blue upside-down triangles) and three apparently maladapted strains that gained almost no benefit (brown diamonds) are also shown. Data from Abel & Erdman (1964); graphical approach suggested by Ezra Lyon.…”

Section: The Rhizosphere As a Tragic Commonsmentioning

confidence: 99%

“…Figure lb shows the variation in benefit provided to a soybean host cultivar "Lee" from 21 different Bradyrhizobimn japonicum strains as a function of nodule weight per plant (data from Abel & Erdman 1964). Three strains (diamonds) gave litde plant benefit (yield similar to uninoculated controls) but also litde rhizobium benefit (low nodule weight per plant).…”

Section: The Rhizosphere As a Tragic Commonsmentioning

confidence: 99%

Sanctions, Cooperation, and the Stability of Plant-Rhizosphere Mutualisms

Kiers

Denison²

2008

Annu. Rev. Ecol. Evol. Syst.

282

289

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There are both costs and benefits for host plants that associate with microbes in the rhizosphere. Typically, an individual plant associates with multiple microbial genotypes varying in mutualistic benefit. This creates a potential tragedy of the commons where less-mutualistic strains potentially share in the collective benefits, while paying less of the costs. Therefore, maintaining cooperation over the course of evolution requires specific mechanisms that reduce the fitness benefits from "cheating." Sanctions that discriminate among partners based on actual symbiotic performance are a key mechanism in rhizobia and may exist in many rhizosphere mutualisms, including rhizobia, mycorrhizal fungi, root endophytes, and perhaps free-living rhizosphere microbes. Where they exist, sanctions may take different forms depending on the system. Despite sanctions, less-effective symbionts still persist. We suggest this is because of mixed infection at spatial scales that limit the effects of sanctions, variation among plants in the strength of sanctions, and conflicting selection regimes.215

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“…In the American midwest, symbiotically-superior inoculant strains of Bradyrhizobium japonicum routinely give rise to only 5-20% of the nodules produced on soybeans (Berg et al, 1988;Caldwell and Vest, 1970;Moawad and Schmidt, 1987;Weaver and Frederick, 1974 a,b), and usually fail to improve yield (Abel and Erdman, 1964;Beard and Hoover, 1971;Berg et al, 1988;Caldwell and Vest, 1970;Ham et al, 1971a). This problem has been perceived as one of competition between soil strains and those applied in the inoculant.…”

Section: Introductionmentioning

confidence: 99%

“…This problem has been perceived as one of competition between soil strains and those applied in the inoculant. By contrast, where soils have not been cropped previously to soybean, establishment of the inoculant strains is not a problem, and increases in seed yield following inoculation are common (Abel and Erdman, 1964;Weaver and Frederick, 1974b).…”

Section: Introductionmentioning

confidence: 99%

Competitiveness of indigenous populations of Bradyrhizobium japonicum serocluster 123 as determined using a root-tip marking procedure in growth pouches

1991

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Soil Bradyrhizobium populations limit nodule occupancy of soybean by symbiotically-superior inoculant strains throughout much of the American midwest. In this study, the competitiveness of indigenous populations of B. japonicum serocluster 123 from Waukegan and Webster soils was evaluated in growth pouches using a root-tip marking procedure. The native rhizobia were from soils incubated 0-8 h in soybean root exudate (SRE) or plant nutrient solution (PNS) prior to inoculation. Populations of serocluster 123 strains in soil and nodule occupancy by these strains were assessed using fluorescent antibodies prepared against B. japonicum USDA 123. There were no significant differences in populations that came from SRE or PNS incubated soils: both populations increased in number over the incubation period. Nodule occupancy by both populations in growth pouches was similar to that previously encountered in field studies with these two soils. With the Waukegan soil, the serocluster 123 population dominated nodulation forming 69 and 62% of taproot nodules above and below the root tip mark, respectively. However, for the more alkaline Webster soil, serocluster 123 strains were much less competitive, producing only 9 and 13%, respectively, of the nodules formed above and below the root tip mark. In growth pouches, soil populations of bradyrhizobia from the Webster soil produced significantly more nodules than those from the Waukegan soil, but both strains and a pure culture of USDA 110 had a similar distribution of nodules.

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Response of Lee Soybeans to Different Strains of Rhizobium japonicum¹

Abstract: Synopsis In soils free of soybean rhizobia, some strains of Rhizobium japonicum were more effective than others on Lee soybeans. In rhizobia‐contaminated soil, none of the strains caused any detectable growth responses on seed‐inoculated plants.

Cited by 66 publications

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Persistence and competitiveness of threeBradyrhizobium japonicum inoculant strains in clay loam Nile valley soil

Persistence and competitiveness of threeBradyrhizobium japonicum inoculant strains in clay loam Nile valley soil

Sanctions, Cooperation, and the Stability of Plant-Rhizosphere Mutualisms

Competitiveness of indigenous populations of Bradyrhizobium japonicum serocluster 123 as determined using a root-tip marking procedure in growth pouches

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Response of Lee Soybeans to Different Strains of Rhizobium japonicum1

Abstract: Synopsis In soils free of soybean rhizobia, some strains of Rhizobium japonicum were more effective than others on Lee soybeans. In rhizobia‐contaminated soil, none of the strains caused any detectable growth responses on seed‐inoculated plants.

Cited by 66 publications

References 0 publications

Persistence and competitiveness of threeBradyrhizobium japonicum inoculant strains in clay loam Nile valley soil

Persistence and competitiveness of threeBradyrhizobium japonicum inoculant strains in clay loam Nile valley soil

Sanctions, Cooperation, and the Stability of Plant-Rhizosphere Mutualisms

Competitiveness of indigenous populations of Bradyrhizobium japonicum serocluster 123 as determined using a root-tip marking procedure in growth pouches

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Response of Lee Soybeans to Different Strains of Rhizobium japonicum¹