Competition for nodulation of soybean by Bradyrhizobium japonicum 123 and 138 in soil containing indigenous rhizobia

Zdor, Robert E.; Pueppke, Steven G.

doi:10.1016/0038-0717(90)90005-k

Cited by 7 publications

(6 citation statements)

References 31 publications

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“…These results indicate that while liquid inoculants may be more effective on soil not having a soybean cropping history, these advantages may be mitigated when fungicide is used as a seed treatment (Table 5). Researchers have commented on the possibility that the particle matrix associated with peat‐based inoculants provides some protection against environmental stresses, particularly lack of moisture and resulting bacterial desiccation (Bashan, 1998; Kyei‐Boahen et al, 2002; Smith, 1992; Zdor and Pueppke, 1990). It is plausible that peat carriers could provide a physical barrier against fungicide–bacteria interaction in the same manner.…”

Section: Resultsmentioning

confidence: 99%

Soybean Seed Inoculant and Fungicidal Seed Treatment Effects on Soybean

Schulz

Thelen

2008

Crop Science

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Several new bacterial inoculant products have been introduced for use as a soybean [Glycine max (L.) Merr.] seed treatment. A 3‐yr study over 16 site‐years determined whether soybean seed inoculation had an effect on grain yield, if yield or growth differences occurred between soybean treated with commercial inoculant products, and whether use of seed‐applied fungicide resulted in yield benefits or interacted with commercial inoculants. Eight commercial inoculants were tested both with and without seed‐applied fungicidal treatment in a split‐plot randomized complete block configuration. Use of soybean inoculant raised soybean yield in 6 of 14 site‐years in fields that had been in soybean rotation. The average yield increase as a result of soybean seed inoculation at these 14 site‐years with a previous history of soybean cropping was 85.6 kg ha−1 Differences between inoculant products were observed only at first‐time soybean sites. Fungicidal seed treatment improved yield on 3 of 16 site‐years and only interacted with inoculant on the two first‐time soybean sites.

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Section: Resultsmentioning

confidence: 99%

Soybean Seed Inoculant and Fungicidal Seed Treatment Effects on Soybean

Schulz

Thelen

2008

Crop Science

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“…In contrast, annual clovers might be a better choice than perennials for gaining insight into the role of the host plant in the phenomenon of competitive nodulation in Trifolium spp. Indeed, although it is widely recognized that specific serotypes of B. japonicum can dominate the root nodules of field-grown soybeans (12,33,40,41), there have also been studies in which no evidence of serotype dominance was obtained (22,57,58).…”

Section: Discussionmentioning

confidence: 99%

Serological and Ecological Characteristics of a Nodule-Dominant Serotype from an Indigenous Soil Population of Rhizobium leguminosarum bv. trifolii

Leung

Yap

Dashti

et al. 1994

Appl Environ Microbiol

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Although at least 13 antigenically distinct serotypes of Rhizobium leguminosarum bv. trifolii exist in an Abiqua silty clay loam soil, one serotype, AS6, occupies .50% of the root nodules formed on field-grown subclover and between 33 and 78% of the nodules formed on five annual clover species grown in the same soil under laboratory conditions. The dominance of subclover nodules by serotype AS6 was reproducible over a 4-year sampling period and throughout the entire 200by 100-m pasture examined. Serotype AS6 was composed of three antigenically distinct subtypes (AS6-a, AS6-b, and AS6-c). Each subtype contributed about one-third of the AS6 isolates recovered from nodules of field-grown subclover plants and maintained similar population densities in nonrhizosphere and rhizosphere soil. Rhizobia with the AS6 antigenic signature accounted for from 20 to 100% of the soil populations of R. keguminosarum in arable and pasture soils under legumes throughout the state of Oregon. Over a 12-month period, the population densities of the serotype AS6 complex and three minor nodule-occupying serotypes (AG4, AP17, and AS21) were measured in the rhizospheres of field-grown subclover and orchard grass and in nonrhizosphere Abiqua soil. Regardless of season or serotype, the orchard grass rhizosphere effect was minimal, with the ratio between rhizosphere and nonrhizosphere serotype population densities ranging between 2.5 (midsummer) and 10.5 (spring). In contrast, the magnitude of the subclover rhizosphere effect varied seasonally and among serotypes. Between October and December the ratios for all serotypes were similar (12.5 to 25.5). However, in the spring (April and May), the magnitude of the rhizosphere effect varied among the indigenous serotypes (ratios, 10.5 to 442) and for minor nodule-occupying serotypes AS21 (ratio, 442) and AP17 (ratio, 47) was as great as, or even greater than, the magnitude of the rhizosphere effect observed with the AS6 complex (ratio, 65.5).

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“…Rhizobia are fairly specific as to which legumes they will infect, form nodules on the roots of, and for which they will fix nitrogen (Lupwayi and Kennedy, 2007). In order to ensure the availability of the correct effective strain specific to a legume plant species, an inoculation practice should be performed, particularly when the legume being planted has not been grown in that field in at least the past three years or with every planting of a high value crop (Zdor and Pueppke, 1990). Researchers have sought for ways of improving nitrogen fixation and enhancing yield of grain legumes by selecting efficient strains for production of inoculants (Hynes et al, 2001).…”

Section: Introductionmentioning

confidence: 99%

Study on the isolation and characterization of rhizobia strains as biofertilizer tools for growth improvement of four grain legumes in Ngaoundéré-Cameroon

Ngakou¹,

Clautilde²,

Ousseni³

et al. 2010

International Journal of Biological and Chemical Sciences

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Increasing the yield and economical efficiency of grain legumes in the Guinea-Savannah zone of Cameroon is a high researcher priority to assist growers in the rural areas. We report here a two-years study in the production process of fertilizer containing rhizobia for a sustainable production of grain legumes in the region. To address the issue, nodulation and rhizobia strains characterization were assessed at Dang and Wakwa, two soils different in trapping rhizobia partners for groundnut, bambara groundnut, cowpea and soybean. This was a prerequisite step in the determination of the most efficient rhizobia strains for biofertilizer production. Results indicate that all the four grain legumes differently formed nodules in their roots system in the two experimental soils. Cowpea and soybean demonstrated a highly significant (p 0.001) potential in fixing atmospheric nitrogen through their nodules than groundnut and bambara groundnut. The dry weight of nodules in groundnut and bambara groundnut was significantly lower (0.0001 < p 0.038) than that of cowpea and soybean in the two soils. When rhizobia were isolated from root nodules of plant species, the number of isolates ranged from 2 to 4 per grain legumes. All the isolates were convex in elevation, smooth/humid on the surface, with regular edges, except one groundnut colony from wakwa soil. The colonies were either whitish for soybean, whitish/yellowish for cowpea, groundnut and bambara groundnut. The rhizobia biofertilizer produced for each grain legumes were stored in the refrigerator for field tests. This is a step forward for further molecular characterization of isolates to enable production of elite inoculum in the region.

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Competition for nodulation of soybean by Bradyrhizobium japonicum 123 and 138 in soil containing indigenous rhizobia

Cited by 7 publications

References 31 publications

Soybean Seed Inoculant and Fungicidal Seed Treatment Effects on Soybean

Soybean Seed Inoculant and Fungicidal Seed Treatment Effects on Soybean

Serological and Ecological Characteristics of a Nodule-Dominant Serotype from an Indigenous Soil Population of Rhizobium leguminosarum bv. trifolii

Study on the isolation and characterization of rhizobia strains as biofertilizer tools for growth improvement of four grain legumes in Ngaoundéré-Cameroon

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