Population size, distribution, and symbiotic characteristics of indigenous Bradyrhizobium spp. that nodulate TGx soybean genotypes in Africa

Abaidoo, Robert C.; Keyser, H. H.; Singleton, Paul; Dashiell, Kenton E.; Sanginga, N.

doi:10.1016/j.apsoil.2006.05.006

Cited by 74 publications

(63 citation statements)

References 30 publications

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“…2). The almost identical nodC and nifH nucleotide sequences among our isolates and those of B. japonicum, which is the main soybean rhizobium in the center of origin for the plant and coexisted with the new groups in the tested soils, implied that these novel genospecies might have obtained their symbiotic genes by lateral gene transfer from B. japonicum, similar to the cases in some other reports (54,58,59).…”

Section: Discussionsupporting

confidence: 61%

Abundance and Diversity of Soybean-Nodulating Rhizobia in Black Soil Are Impacted by Land Use and Crop Management

Yan

Han

et al. 2014

Appl Environ Microbiol

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To investigate the effects of land use and crop management on soybean rhizobial communities, 280 nodule isolates were trapped from 7 fields with different land use and culture histories. Besides the known Bradyrhizobium japonicum, three novel genospecies were isolated from these fields. Grassland (GL) maintained a higher diversity of soybean bradyrhizobia than the other cultivation systems. Two genospecies (Bradyrhizobium spp. I and III) were distributed widely in all treatments, while Bradyrhizobium sp. II was found only in GL treatment. Cultivation with soybeans increased the rhizobial abundance and diversity, except for the soybean monoculture (S-S) treatment. In monoculture systems, soybeans favored Bradyrhizobium sp. I, while maize and wheat favored Bradyrhizobium sp. III. Fertilization decreased the rhizobial diversity indexes but did not change the species composition. The organic carbon (OC) and available phosphorus (AP) contents and pH were the main soil parameters positively correlated with the distribution of Bradyrhizobium spp. I and II and Bradyrhizobium japonicum and negatively correlated with Bradyrhizobium sp. III. These results revealed that different land uses and crop management could not only alter the diversity and abundance of soybean rhizobia, but also change interactions between rhizobia and legume or nonlegume plants, which offered novel information about the biogeography of rhizobia.

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Section: Discussionsupporting

confidence: 61%

Abundance and Diversity of Soybean-Nodulating Rhizobia in Black Soil Are Impacted by Land Use and Crop Management

Yan

Han

et al. 2014

Appl Environ Microbiol

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“…In 2006, however, ITH98-46 together with Vuli-1 recorded the highest concentrations of Fe, Zn, Cu, Mn and B in edible leaves, as well as Fe, Cu and Mn in grain (Table 4). These variations in the mineral profile of cowpea leaves and grain between years could be attributed to soil factors, including moisture, available mineral N and quality and quantity of soil bacteria nodulating cowpea [28][29][30]. We have reported elsewhere that cowpea genotypes exhibit nodulation preferences for their microsymbionts even when planted in the same soil [31].…”

Section: Discussionmentioning

confidence: 99%

Elevated Concentrations of Dietarily-Important Trace Elements and Macronutrients in Edible Leaves and Grain of 27 Cowpea (<i>Vigna unguiculata</i> L. Walp.) Genotypes: Implications for Human Nutrition and Health

Belane¹,

Dakora²

2012

FNS

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Legumes are a good source of calories, protein and mineral nutrients for human nutrition and health. In this study, the edible leaves and grain of 27 field-grown cowpea genotypes were assessed for trace elements and macronutrient density at Manga in the Sudano-Sahelian zone of Ghana in 2005 and 2006, using inductively coupled plasma-mass spectrometry. The genotypes differed markedly in their accumulation of trace elements and major nutrients in edible leaves and grain. Except for P, the concentrations of K, Ca, Mg, S and Na were much higher in edible cowpea leaves than grain in 2005. A similar pattern was observed for Ca, Mg, S, Na in 2006. However, more dramatic variations were found in the micronutrient concentrations between edible cowpea leaves and grain. The levels of the trace elements Fe, Cu, Zn, Mn and B were sometimes 2-to 20-fold greater in leaves than grain of cowpea. Furthermore, there were strong geno-typic differences in mineral density of cowpea leaves and grain. For the major nutrients, for example, IT93K-2045-29 and IT90K-59 accumulated greater concentrations of P, K, Ca, S and Na in both edible leaves and grain in 2006, while ITH98-46, which showed the least macronutrient density, exhibited the highest concentrations of Fe, Zn, Cu, Mn and B in edible leaves, as well as Fe, Cu and Mn in grain. These results have implications for cowpea breeding, as well as for human nutrition and health.

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“…Oscar et al (2014) reported that the nitrogen demand of soybean can be supplied via biological nitrogen fixation through the inoculation with the selected Bradyrhizobium japonicum and PGPR. Especially, in soils where the soybean crop has not been grown previously, compatible populations of Bradyrhizobia are seldom available (Abaidoo et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Application of biofertilizers and zinc increases yield, nodulation and unsaturated fatty acids of soybean

Sharifi¹

2016

Zemdirbyste-Agriculture

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In order to study the effects of biofertilizers and zinc on yield, nodulation state and fatty acids composition of soybean, factorial experiments were conducted using a randomized complete block design with three replications during 2013 and 2014 cropping seasons. Experimental factors included nano zinc oxide in four levels: without nano zinc oxide (Zn0) as control, application of 0.3 (Zn1), 0.6 (Zn2) and 0.9 (Zn3) g L -1 , and five biofertilizers levels: no biofertilizer (B0), seed inoculation by Bradyrhizobium japonicum (B1), B. japonicum + Azosprillum lipoferum strain OF (B2), B. japonicum + Pseudomonas putida strain 186 (B3) and B. japonicum + A. lipoferum strain OF + P. putida strain 186 (B4). The results showed that maximum number of nodules per plant (16.55) and grain yield (1875 kg ha -1 ) were recorded at the application of biofertilizer and nano zinc oxide as Zn3B4. The highest dry weight of nodules per plant, the number of pods and grains per plant were obtained in application of nano zinc oxide as Zn3 and biofertilizers as B4. Oil and protein content increased through the application of biofertilizers and nano zinc oxide. The maximum oil content was obtained by applying 0.9 g L -1 nano zinc oxide and inoculation as B4. The saturated fatty acids (palmitic and stearic acids) declined by inoculation with biofertilizer in comparison with the control, while unsaturated fatty acids (linoleic, linolenic and oleic) were increased. Results showed that both application of biofertilizer and 0.9 g L -1 nano zinc oxide (Zn3B4) increased grain yield by about 68% in comparison with Zn0B0. Based on the results, it was concluded that co-inoculation with B. japonicum + plant growth promoting rhizobacteria and nano zinc oxide application can be recommended for profitable soybean production.

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Population size, distribution, and symbiotic characteristics of indigenous Bradyrhizobium spp. that nodulate TGx soybean genotypes in Africa

Cited by 74 publications

References 30 publications

Abundance and Diversity of Soybean-Nodulating Rhizobia in Black Soil Are Impacted by Land Use and Crop Management

Abundance and Diversity of Soybean-Nodulating Rhizobia in Black Soil Are Impacted by Land Use and Crop Management

Elevated Concentrations of Dietarily-Important Trace Elements and Macronutrients in Edible Leaves and Grain of 27 Cowpea (<i>Vigna unguiculata</i> L. Walp.) Genotypes: Implications for Human Nutrition and Health

Application of biofertilizers and zinc increases yield, nodulation and unsaturated fatty acids of soybean

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Population size, distribution, and symbiotic characteristics of indigenous Bradyrhizobium spp. that nodulate TGx soybean genotypes in Africa

Cited by 74 publications

References 30 publications

Abundance and Diversity of Soybean-Nodulating Rhizobia in Black Soil Are Impacted by Land Use and Crop Management

Abundance and Diversity of Soybean-Nodulating Rhizobia in Black Soil Are Impacted by Land Use and Crop Management

Elevated Concentrations of Dietarily-Important Trace Elements and Macronutrients in Edible Leaves and Grain of 27 Cowpea (&lt;i&gt;Vigna unguiculata&lt;/i&gt; L. Walp.) Genotypes: Implications for Human Nutrition and Health

Application of biofertilizers and zinc increases yield, nodulation and unsaturated fatty acids of soybean

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Elevated Concentrations of Dietarily-Important Trace Elements and Macronutrients in Edible Leaves and Grain of 27 Cowpea (<i>Vigna unguiculata</i> L. Walp.) Genotypes: Implications for Human Nutrition and Health