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Effects of different soil water content on biological nitrogen fixation at soybean

100%

Coskan A., Oz H., Atilgan A.

Infrastruktura i Ekologia Terenów Wiejskich

2013

nr 1/III

Biological nitrogen fixation (BNF) is the process that provides organic nitrogenous compounds to the plants by using molecular nitrogen in atmosphere. Higher plants are not capable to use molecular nitrogen in atmosphere as a nitrogen source to generate essential proteins. Therefore plants either should be fertilized by adequate nitrogenous fertilizers or the microorganisms which are capable to produce nitrogenase should provide nitrogen to the plants by BNF. From among a number of factors affecting BNF, soil moisture content and ambient temperatures are considerably effective on the fixation rate. Therefore the global warming would be dramatically defective on BNF, thus effects of soil moisture as well as soil and ambient temperatures on BNF should evaluate prior rising temperature. A pot experiment was carried out to determine the effects of soil water contents on BNF. Four different soil water contents (%25, %50, %75 and %100 of water holding capacity) were adjusted either every 3 days or just after plants indicate wilting point. Non-inoculated pots were added to experiment as a control. The results revealed that BNF is affected by different level of soil water content. The mechanism of this effect would not be the direct effect of water, but the side effect of water on soil oxygen content; therefore, an aeration capability.

Competitiveness of Rhizobium leguminosarum bv. trifolii strains in mixed inoculation of clover (Trifolium pratense)

67%

Wielbo J., Marek-Kozaczuk M., Kidaj D., Skorupska A.

Polish Journal of Microbiology

2011

tom 60

nr 1

Rhizobium leguminosarum bv. trifolii (Rlt) establishes beneficial root nodule symbiosis with clover. Twenty Rlt strains differentially marked with antibiotic-resistance markers were investigated in terms of their competitiveness and plant growth promotion in mixed inoculation of clover in laboratory experiments. The results showed that the studied strains essentially differed in competition ability. These differences seem not to be dependent on bacterial multiplication in the vicinity of roots, but rather on complex physiological traits that affect competitiveness. The most remarkable result of this study is that almost half of the total number of the sampled nodules was colonized by more than one strain. The data suggest that multi-strain model of nodule colonization is common in Rhizobium-legume symbiosis and reflects the diversity of rhizobial population living in the rhizosphere.

Biodiversity of nitrogen fixing indigenous rhizobia nodulating common bean (Phaseolus vulgaris L.), cowpea (Vigna unguiculata (L.) Walp.), soybean (Glycine max L. Merry), and others pulses isolated from Sub-Saharan Africa soils. A review

67%

Bongo A. L., Pietr S. J.

Electronic Journal of Polish Agricultural Universities. Series Agronomy

2019

tom 22

nr 4

Ograniczanie wyników

1 Electronic Journal of Polish Agricultural Universities. Series Agronomy

1 Infrastruktura i Ekologia Terenów Wiejskich

1 Polish Journal of Microbiology

1 Atilgan A.

1 Bongo A. L.

1 Coskan A.

1 Kidaj D.

1 Marek-Kozaczuk M.

1 Oz H.

1 Pietr S. J.

1 Skorupska A.

1 Wielbo J.

1 2019

1 2013

1 2011

Wyniki wyszukiwania

Effects of different soil water content on biological nitrogen fixation at soybean

Competitiveness of Rhizobium leguminosarum bv. trifolii strains in mixed inoculation of clover (Trifolium pratense)

Biodiversity of nitrogen fixing indigenous rhizobia nodulating common bean (Phaseolus vulgaris L.), cowpea (Vigna unguiculata (L.) Walp.), soybean (Glycine max L. Merry), and others pulses isolated from Sub-Saharan Africa soils. A review