scholarly journals Constitutive expression of the nifA gene activates associative nitrogen fixation of Enterobacter gergoviae 57-7, an opportunistic endophytic diazotroph

2007 ◽  
Vol 103 (3) ◽  
pp. 613-620 ◽  
Author(s):  
Q. An ◽  
Y. Dong ◽  
W. Wang ◽  
Y. Li ◽  
J. Li
Keyword(s):  
Nitrogen Fixation ◽  
Constitutive Expression ◽  
Associative Nitrogen Fixation ◽  
Nifa Gene

High-temperature-adaptedAzospirillum brasilensestrains: growth and interaction response on associative nitrogen fixation, mineral uptake and yield of cheena (Panicum miliaceumL.) genotypes in calcareous soil

1988 ◽  
Vol 110 (2) ◽  
pp. 321-329 ◽  
Author(s):  
R. Rai
Keyword(s):  
Nitrogen Fixation ◽  
High Temperature ◽  
Calcareous Soil ◽  
Nitrogenase Activity ◽  
Dry Weight ◽  
Cross Resistance ◽  
Mineral Uptake ◽  
Associative Nitrogen Fixation ◽  
Seed Inoculation ◽  
Resistance To Penicillin

SummaryHigh-temperature-adapted strains RAU 1, RAU 2 and RAU 3 ofAzospirillum brasilenseC 7 were isolated from stepwise transfer to higher temperature (30 to 42 °C). One of the strains (RAU 1) showed more growth, greater nitrogenase and hydrogenase activities at 30 and 42 °C than parental and other temperature-adapted strains. This strain also showed growth and more nitrogenase activity from pH 6·5 to 8·0. Strain RAU 1 showed cross-resistance to penicillin (300/µg/ml) but not to streptomycin, kanamycin, viomycin and polymixin B at 30 and 42 °C. It was demonstrated in field plots in calcareous soil that seed inoculation with RAU 1 enhanced mineral uptake of cheena. Inoculation with RAU 1 led to a significant increase in associative nitrogen fixation, dry weight of roots, grain and straw yield of cheena compared with the uninoculated control with or without applied N, but the effect of seed inoculation with high-temperature-adapted strains was variable with different genotypes of cheena.

scholarly journals TECHNOLOGY PECULIARITIES OF NEW BIOLOGICAL PREPARATION MICROHUMIN

2008 ◽  
Vol 7 ◽  
pp. 57-68
Author(s):  
V.V. Volkogon ◽  
O.M. Berdnikov ◽  
E.I. Volkogon ◽  
N.P. Shtan’ko
Keyword(s):  
Nitrogen Fixation ◽  
Growth And Development ◽  
Spring Barley ◽  
Research Data ◽  
Biologically Active ◽  
Nitrogen Fixing ◽  
Active Nitrogen ◽  
Associative Nitrogen Fixation ◽  
Biological Preparation ◽  
Effect On Growth

The paper covers research data on technology elaboration of new biological preparation Microhumin. It was shown that combination of biologically active biohumus extract with the suspension of active nitrogen fixing strain of azospirills in certain ratio results in creation of preparation performing additive stimulatory effect on growth and development of spring barley plants and activity of associative nitrogen fixation.

scholarly journals Indications of Associative Nitrogen Fixation in Eastern Gamagrass

1994 ◽  
Vol 47 (3) ◽  
pp. 192 ◽  
Author(s):  
John J. Brejda ◽  
Robert J. Kremer ◽  
James R. Brown
Keyword(s):  
Nitrogen Fixation ◽  
Associative Nitrogen Fixation ◽  
Eastern Gamagrass

scholarly journals THE INFLUENCE OF TRIMAN-1 ON ASSOCIATIVE NITROGEN FIXATION AND NITROGEN FIXING MICROORGANISMS IN BARLEY ROOT ZONE

2008 ◽  
Vol 6 ◽  
pp. 29-38
Author(s):  
V.V. Volkogon ◽  
O.I. Bakun ◽  
E.I. Volkogon ◽  
N.P. Shtanko ◽  
P.G. Dulnev
Keyword(s):  
Nitrogen Fixation ◽  
Plant Growth ◽  
Plant Growth Regulator ◽  
Root Zone ◽  
Barley Root ◽  
Nitrogen Fertilizers ◽  
Nitrogen Fixing ◽  
Associative Nitrogen Fixation ◽  
Nitrogen Fixation Activity ◽  
Associative Symbiosis

The influence of plant growth regulator triman-1 on nitrogen fixing bacteria and nitrogen fixation process in barley root zone was studied in the laboratory and field conditions. It was shown that triman- 1 enhances associative nitrogen fixation activity when mineral nitrogen fertilizers (N30) was used. The use of triman-1 increases efficiency of associative symbiosis more effectively with the use of carboammonium salts rather than with ammonium nitrate.

scholarly journals ASSESSMENT OF WINTER WHEAT VARIETIES BY THEIR ASSOCIATIVE NITROGEN FIXATION ABILITY

2013 ◽  
Vol 17 ◽  
pp. 67-78
Author(s):  
O. V. Nadkernychna ◽  
S. M. Minenok ◽  
R. L. Boguslavsky ◽  
O. Yu Leonov
Keyword(s):  
Nitrogen Fixation ◽  
Winter Wheat ◽  
Agricultural Landscapes ◽  
Mineral Nitrogen ◽  
Nitrogen Fertilizers ◽  
High Yield ◽  
High Nitrogen ◽  
Wheat Varieties ◽  
Associative Nitrogen Fixation ◽  
Winter Wheat Varieties

The paper depicts the results of intervarietal variability study of winter wheat plants in controlled environment with varieties Albatross Odessa, Kiriya, Zolotokolosa, Lybid and Odeska 267 by their associative nitrogen fixation ability. The 5.6 – 13.7 – fold divergence between the varieties by given index was revealed. It was shown that intravarietal variability of winter wheat plants by their ability to stimulate associative nitrogen fixation occurs along with the intervarietal one. Populations intensity of a different genotypes characterized by high nitrogen fixation activity in root zone, stipulates high nitrogen fixation potential of variety. Among the studied varieties Zolotokolosa was selected as genetically homogeneous variety with high nitrogen fixation potential of rhizosphere microorganisms that can be recommended for use in breeding as a source with high capacity for associative nitrogen fixation. New winter wheat varieties with high nitrogen fixation potential can fully develop using not only mineral nitrogen fertilizers, but also interacting with associative nitrogen fixation microorganisms should partially replace mineral nitrogen with biological that, in turn, will guarantee a high yield quality and conservation of agricultural landscapes.

scholarly journals ASSOCIATIVE NITROGEN FIXATION ACTIVATION MEANS IN AGROCENOSIS

2012 ◽  
Vol 14 ◽  
pp. 7-31
Author(s):  
V.V. Volkogon ◽  
V.V. Skoryk
Keyword(s):  
Nitrogen Fixation ◽  
Crop Production ◽  
Agricultural Soils ◽  
Agricultural Practices ◽  
Nitrogen Fertilizers ◽  
Biological Degradation ◽  
Associative Nitrogen Fixation ◽  
Production Technologies ◽  
Seed Crops ◽  
Physiologically Active Compounds

The paper overlooks the influence of various agricultural practices on associative nitrogen fixation, including pre-sowing bacterization of seed crops with active strains of associative diazotrophic bacteria, and application of nitrogen fertilizers in physiologically optimal doses in crop production technologies. The authors discuss the relation of process’s activity and plant’s genotype. Due to the biological degradation of the most agricultural soils, and a significant reduction of pool of physiologically active compounds in it, it is appropriate to use growth stimulators in order to intensify associative nitrogen fixation and plant growth.

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