Size, symbiotic effectiveness and genetic diversity of field pea rhizobia (Rhizobium leguminosarum bv. viciae) populations in South Australian soils

Ballard, Ross; Charman, N.; McInnes, Alison; Davidson, J. A.

doi:10.1016/j.soilbio.2004.04.016

Cited by 34 publications

(27 citation statements)

References 25 publications

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“…All these shoot biomass were obtained from Rhizobium inoculated with 40 kg N ha . It has been shown that number of native rhizobia had a detrimental impact on productivity of above ground dry biomass [39]. Denton et al [40] found increased shoot biomass production with increased Rhizobium inoculation rate.…”

Section: Shoot Dry Weightmentioning

confidence: 99%

Indigenous rhizobia population influences the effectiveness of Rhizobium inoculation and need of inorganic N for common bean (Phaseolus vulgaris L.) production in eastern Ethiopia

Argaw

Tsigie

2015

Chem. Biol. Technol. Agric.

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Background: Supplement with inorganic N application is essential to improve the common bean production in sub-Saharan Africa. However, the influence of indigenous rhizobial population on the inorganic N requirement with Rhizobium inoculation to secure sustainable way of common bean production system is not well known. The effect of different rates of N application either alone or in combination with Rhizobium inoculation on the nodulation, yield and yield traits of common bean cultivated in soils with different rhizobial population were conducted.Methods: Twelve treatments were produced by factorially combined six levels of N fertilizer (0, 20, 40, 60, 80 and 100 kg N ha) and two Rhizobium inoculation treatments (inoculated and uninoculated). The treatments were laid out in randomized completely block design and all treatments were replicated three times.Result: Regardless of soil types, nodule number and nodule dry weight decreased with increasing rates of N application. 20 kg N ha −1 both alone and in combination with Rhizobium inoculation resulted in the largest nodulation in all soil types. The largest nodulation were induced in soil with large rhizobial population. Rhizobium inoculation significantly (P < 0.05) improved yield and yield traits of common bean. Moreover, our result revealed that the largest values of investigated traits were observed in inoculated treatment, as compared to the corresponding N rates of uninoculated treatments. The 20, 100 and 40 kg N ha −1 treatments resulted in significantly greater plant total tissue N at soil types with small, medium and large rhizobial population, respectively, as compared to unfertilized control. The highest total biomass yield (TBY) and grain yield (GY) at soil types with small and medium rhizobial population were obtained by the 100 kg N ha −1 treatment in combination with Rhizobium inoculation, while 20 and 40 kg N ha −1 applications produced the greatest TBY and GY, respectively, in soil with large rhizobial population. Conclusion:These results indicate that N requirement is varied based on rhizobial population and effectiveness of native rhizobia in N 2 fixation.

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Section: Shoot Dry Weightmentioning

confidence: 99%

Indigenous rhizobia population influences the effectiveness of Rhizobium inoculation and need of inorganic N for common bean (Phaseolus vulgaris L.) production in eastern Ethiopia

Argaw

Tsigie

2015

Chem. Biol. Technol. Agric.

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“…The architecture and functioning of rhizobial genomes is a reasonable basis for intra-diversification of local rhizobial populations. Naturalized rhizobial populations relatively new to an environment, such as in Australian soils, may be composed of only few strains [48], and such low-diversified populations could be sparse as well as numerous [47]. Rhizobial communities originating from regions with an endemic legume presence could contain dozens of genetically and physiologically diverse strains [49][50][51][52][53].…”

Section: The Diversity Of Local Rhizobial Populationsmentioning

confidence: 99%

“…Surprisingly, while the symbiotic efficiency of rhizobial populations may vary greatly, the majority are considered to have a low efficiency. Consequently, the use of high-effective strains as legume inoculants is considered a promising agricultural strategy [47,48].…”

Section: The Diversity Of Local Rhizobial Populationsmentioning

confidence: 99%

Rhizobial communities in symbiosis with legumes: genetic diversity, competition and interactions with host plants

Wielbo

2012

Open Life Sciences

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AbstractThe term ‘Rhizobium-legume symbiosis’ refers to numerous plant-bacterial interrelationships. Typically, from an evolutionary perspective, these symbioses can be considered as species-to-species interactions, however, such plant-bacterial symbiosis may also be viewed as a low-scale environmental interplay between individual plants and the local microbial population. Rhizobium-legume interactions are therefore highly important in terms of microbial diversity and environmental adaptation thereby shaping the evolution of plant-bacterial symbiotic systems. Herein, the mechanisms underlying and modulating the diversity of rhizobial populations are presented. The roles of several factors impacting successful persistence of strains in rhizobial populations are discussed, shedding light on the complexity of rhizobial-legume interactions.

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“…Populations of soil rhizobia often vary considerably in their abundance and effectiveness in nodulating and fixing atmospheric nitrogen (N 2 ) symbiotically with their legume hosts [25,26]. Low fertile soils, particularly sandy soils, contain insufficient numbers of indigenous rhizobia to form efficient symbiotic relationships with their appropriate legumes.…”

Section: Introductionmentioning

confidence: 99%

Improvement of Faba Bean Yield Using Rhizobium/Agrobacterium Inoculant in Low-Fertility Sandy Soil

2017

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Soil fertility is one of the major limiting factors for crop's productivity in Egypt and the world in general. Biological nitrogen fixation (BNF) has a great importance as a non-polluting and a cost-effective way to improve soil fertility through supplying N to different agricultural systems. Faba bean (Vicia faba L.) is one of the most efficient nitrogen-fixing legumes that can meet all of their N needs through BNF. Therefore, understanding the impact of rhizobial inoculation and contrasting soil rhizobia on nodulation and N 2 fixation in faba bean is crucial to optimize the crop yield, particularly under low fertility soil conditions. This study investigated the symbiotic effectiveness of 17 Rhizobium/Agrobacterium strains previously isolated from different Egyptian governorates in improving the nodulation and N 2 fixation in faba bean cv. Giza 843 under controlled greenhouse conditions. Five strains that had a high nitrogen-fixing capacity under greenhouse conditions were subsequently tested in field trials as faba bean inoculants at Ismaillia Governorate in northeast Egypt in comparison with the chemical N-fertilization treatment (96 kg N·ha −1 ). A starter N-dose (48 kg N·ha −1 ) was applied in combination with different Rhizobium inoculants. The field experiments were established at sites without a background of inoculation under low fertility sandy soil conditions over two successive winter growing seasons, 2012/2013 and 2013/2014. Under greenhouse conditions, inoculated plants produced significantly higher nodules dry weight, plant biomass, and shoot N-uptake than non-inoculated ones. In the first season (2012/2013), inoculation of field-grown faba bean showed significant improvements in seed yield (3.73-4.36 ton·ha −1 ) and seed N-yield (138-153 Kg N·ha −1 ), which were higher than the uninoculated control (48 kg N·ha −1 ) that produced 2.97 Kg·ha −1 and 95 kg N·ha −1 , respectively. Similarly, in the second season (2013/2014), inoculation significantly improved seed yield (3.16-4.68 ton·ha −1 ) and seed N-yield (98-155 Kg N·ha −1 ) relative to the uninoculated control (48 kg N·ha −1 ), which recorded 2.58 Kg·ha −1 and 80 kg N·ha −1 , respectively. Interestingly, faba bean inoculated with strain Rlv NGB-FR 126 showed significant increments in seed yield (35%-48%) and seed N-yield (34%-49%) compared to the inorganic N fertilizers treatment (96 kg N·ha −1 ) over the two cropping seasons, respectively. These results indicate that inoculation of faba bean with effective rhizobial strains can reduce the need for inorganic N fertilization to achieve higher crop yield under low fertility soil conditions.

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Size, symbiotic effectiveness and genetic diversity of field pea rhizobia (Rhizobium leguminosarum bv. viciae) populations in South Australian soils

Cited by 34 publications

References 25 publications

Indigenous rhizobia population influences the effectiveness of Rhizobium inoculation and need of inorganic N for common bean (Phaseolus vulgaris L.) production in eastern Ethiopia

Indigenous rhizobia population influences the effectiveness of Rhizobium inoculation and need of inorganic N for common bean (Phaseolus vulgaris L.) production in eastern Ethiopia

Rhizobial communities in symbiosis with legumes: genetic diversity, competition and interactions with host plants

Improvement of Faba Bean Yield Using Rhizobium/Agrobacterium Inoculant in Low-Fertility Sandy Soil

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