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1

Effect of ammonium nitrate on nitrogenase activity in pea varietes Ramir and Koral

100%
Wojcieska U., Mroczkowski W., Podlesna A., Kocon A.
Bulletin of the Polish Academy of Sciences. Biological Sciences
|
1994
|
tom 42
|
nr 2
2

Reaction of faba bean plants to soil and foliar N application and K nutrition

86%
Wojcieska U., Kocon A.
Acta Physiologiae Plantarum
|
1997
|
tom 19
|
nr 1
The effect of different rates and methods of fertilizer nitrogen application and potassium nutrition on the root nodule formation of faba bean plants var. Nadwiślański and on their nitrogenase activity was studied. It was found that fertilizer N depressed the nodule formation and nitrogenase activity, but inhibitory effect of N was smaller when it was supplied to the leaves instead to the soil. Plants growing at higher K level were in a position allowing on better development of nodules and consequently higher N₂₋ fixation.
3

Localization of nitrogenase and nitrate reductase in the Cycas-Anabaena cycadeae association

72%
Sharma A., Mishra P., Kumar A.
Acta Biologica Cracoviensia. Series Botanica
|
2004
|
tom 46
213-216
Induction of nitrate reductase (NR) activity in coralloid roots of Cycas revoluta was observed after 8 h incubation in 0.02 M KNO3. Other plants growing near Cycas showed a higher level of NR immediately when incubated in KNO3. In contrast to NR, intact coralloid roots showed very high nitrogenase activity (~1.2 to 1.6 µmol C2H4 g fresh wt-1 h-1) under both light and dark conditions as compared to transverse sections of roots. Localization of NR and nitrogenase was tested in coralloid roots using different sets of roots and also in the endophyte. Our results showed that NR activity was mainly due to the endophyte (Anabaena cycadeae); coralloid roots lacked it, as no NR activity was observed in chloramphenicol-treated intact root samples.
4
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Effect of the culturing density of the Sinorhizobium meliloti Bp on the development of lucerne (Medicago sativa L.) and nitrogenase activity

72%
Mocek-Plociniak A., Niewiadomska A., Gluchowska K.
Acta Scientiarum Polonorum. Agricultura
|
2008
|
tom 07
|
nr 1
The authors investigated the impact of the Sinorhizobium inoculum density on the plant development of alfalfa, nodulation and nitrogenase activity. It was found that plants inoculated with a 10% inoculant (4.9 x 10⁶ CFU) were characterized by the best growth, more profuse fresh material and a very well developed root system and, additionally, they revealed higher nitrogenase activity.
5

Occurrence and characteristic of Azospirillum spp. in the rhizosphere of cereals

58%
Jaskowska H.
Acta Microbiologica Polonica
|
1995
|
tom 44
|
nr 1
6

Effect of Carbendazim, imazetapir and thiram on nitrogenase activity, the number of microrganisms in soil and yield of red clover [Trifolium pratense L.]

58%
Niewiadomska A.
Polish Journal of Environmental Studies
|
2004
|
tom 13
|
nr 4
In field and pot experiments the effect of selected pesticides on the atmospheric nitrogen fixation, number of microorganisms in soil and yield of red clover has been investigated. The results obtained indicate that crop protection preparations applied in the experiments (Funaben T seed dressing compound and Pivot 100 SL herbicide) resulted in reduction of nitrogenase activity on the active strain of Rhizobium leguminosarum bv. trifolii KGL both in pot and field experiment conditions. Moreover, the authors observed the toxic effect of the pesticides used on nodulation, root development and yield of clover. The herbicide and fungicide applied also inhibited the multiplication of the microorganisms in soil under red clover plantations in the first days upon application and, later on, stimulated their multiplication.
7

Fungicide effect on nitrogenase activity in methylotrophic bacteria

58%
Durska G.
Polish Journal of Microbiology
|
2004
|
tom 53
|
nr 3
The study comprised tests on the effect of fungicides: Oxafun T, Funaben T and Baytan Universal on the nitrogenase activity of methylotrophic bacteria, selected from the rhizosphere and non-rhizosphere soil of spring barley. The obtained results indicated that the field dose of fungicides - 0.5 ppm had no effect on all the examined strains of methylotrophic bacteria. The dose of 50 ppm, however, had varied effects, suppressing or stimulating, depending on the particular strain. The highest concentration of fungicides applied, i.e. 100 ppm in all cases suppressed the nitrogenase activity of the strains under examination.
8

Effect of carbendazim, imazetapir and thiram on nitrogenase activity, number of microorganisms in soil and yield of hybrid lucerne [Medicago media]

58%
Niewiadomska A., Sawicka A.
Polish Journal of Environmental Studies
|
2002
|
tom 11
|
nr 6
In field and pot experiments the effect of selected pesticides on the nitrogenase activity, num­ber of soil microorganisms, and yield of hybrid lucerne was investigated. The obtained results show that crop protection preparations applied in the experiment (seed dressing compound Funaben T and Pivot 100SL herbicide) reduced the activity of nitrogenase in the active strain of Sinorhizobium me­liloti both under conditions of pot and field experiments. In addition, the authors observed a noxious influence of the applied pesticides on nodulation, root development and yield of lucerne. Furthermore, in the first days after their application, the employed herbicide and fungicide inhibited mul­ti­pli­cation of soil microorganisms under lucerne plantations, while later they were found to stimulate their mul­ti­pli­cation.
9

Nitrogen fixation by Azospirillum with wheat and maize radicles as a source of carbon and energy

51%
Sawicka A., Makarova N. M.
Acta Microbiologica Polonica
|
1994
|
tom 43
|
nr 1
10

Pesticide side effect on the symbiotic efficiency and nitrogenase activity of Rhizobiaceae bacteria family

44%
Niewiadomska A., Klama J.
Polish Journal of Microbiology
|
2005
|
tom 54
|
nr 1
The laboratory experiments tested the influence of selected pesticides on the symbiotic efficiency and nitrogenase activity of Rhizobium teguminosarum bv. trifolii KGL, Sinorhizobium melilotii Bp and Bradyrhizobium sp. Ornithopus B bacteria entering into symbiosis with clover, lucerne and serradella, respectively. The results obtained indicate that the pesticides used in the experiments (Funaben T seed dressing and Pivot 100SL herbicide) caused reduced nitrogenase activity in active strains tested. In addition, a toxic effect of the applied pesticides on the nodulation and root growth of the tested plants was observed.
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