Mobilization hard-to-reach phosphorus compounds in soil and influence growth processes of microbiological association

Abstract The article presents results of research of monocultures and association of lactic-oxide bacteria, purple nonsulfur bacteria and yeast on indicators of stimulation of growth processes, nitrogen fixation and phosphate mobilization for 2 crops: one-year and longterm. The research was carried out in both laboratory and production conditions. It is shown that milk-oxide and purple nonsulfur bacteria stimulate growth processes of wheat variety Nador in aquatic culture by 20-30%, and their consortium with yeast - by 30%. In comparison with control, an increase of 3.4 t/ha in the yield of Golden Delishes apples was detected with 2fold treatment based on a consortium of lactic oxide, purple nonsulfur bacteria and sucromycetes. It was determined that all the strains of the above-mentioned groups of microorganisms studied mobilized hard-to-soluble compounds of phosphorus, and only purple nonsulfur bacteria were capable of nitrogen fixation.

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Incorporation of maize crop residue maintains soybean yield through the stimulation of nitrogen fixation rather than residue-derived nitrogen in Mollisols

Field Crops Research ◽

10.1016/j.fcr.2021.108269 ◽

2021 ◽

Vol 272 ◽

pp. 108269

Author(s):

Zhihuang Xie ◽

Yansheng Li ◽

Zhenhua Yu ◽

Guanghua Wang ◽

Caixian Tang ◽

...

Keyword(s):

Nitrogen Fixation ◽

Crop Residue ◽

Maize Crop ◽

Soybean Yield ◽

Stimulation Of

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Potential of Phototrophic Purple Nonsulfur Bacteria to Fix Nitrogen in Rice Fields

Microorganisms ◽

10.3390/microorganisms10010028 ◽

2021 ◽

Vol 10 (1) ◽

pp. 28

Author(s):

Isamu Maeda

Keyword(s):

Nitrogen Fixation ◽

Regulatory Networks ◽

Nitrogenase Activity ◽

Field Studies ◽

Rice Fields ◽

Purple Nonsulfur Bacteria ◽

Available Nitrogen ◽

Nitrogenase Activities ◽

Plant Available Nitrogen ◽

Biological Nitrogen

Biological nitrogen fixation catalyzed by Mo-nitrogenase of symbiotic diazotrophs has attracted interest because its potential to supply plant-available nitrogen offers an alternative way of using chemical fertilizers for sustainable agriculture. Phototrophic purple nonsulfur bacteria (PNSB) diazotrophically grow under light anaerobic conditions and can be isolated from photic and microaerobic zones of rice fields. Therefore, PNSB as asymbiotic diazotrophs contribute to nitrogen fixation in rice fields. An attempt to measure nitrogen in the oxidized surface layer of paddy soil estimates that approximately 6–8 kg N/ha/year might be accumulated by phototrophic microorganisms. Species of PNSB possess one of or both alternative nitrogenases, V-nitrogenase and Fe-nitrogenase, which are found in asymbiotic diazotrophs, in addition to Mo-nitrogenase. The regulatory networks control nitrogenase activity in response to ammonium, molecular oxygen, and light irradiation. Laboratory and field studies have revealed effectiveness of PNSB inoculation to rice cultures on increases of nitrogen gain, plant growth, and/or grain yield. In this review, properties of the nitrogenase isozymes and regulation of nitrogenase activities in PNSB are described, and research challenges and potential of PNSB inoculation to rice cultures are discussed from a viewpoint of their applications as nitrogen biofertilizer.

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Stimulation of nitrogen fixation in refractory organic sediments by Caulerpa taxifolia (Chlorophyta)

Limnology and Oceanography ◽

10.4319/lo.2003.48.2.0787 ◽

2003 ◽

Vol 48 (2) ◽

pp. 787-794 ◽

Cited By ~ 51

Author(s):

John R. M. Chisholm ◽

Pascale Moulin

Keyword(s):

Nitrogen Fixation ◽

Caulerpa Taxifolia ◽

Organic Sediments ◽

Stimulation Of

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Unilateral deep brain stimulation of the nucleus accumbens in patients with treatment-resistant obsessive-compulsive disorder: Outcomes after one year

Clinical Neurology and Neurosurgery ◽

10.1016/j.clineuro.2009.11.006 ◽

2010 ◽

Vol 112 (2) ◽

pp. 137-143 ◽

Cited By ~ 197

Author(s):

Wolfgang Huff ◽

Doris Lenartz ◽

Michael Schormann ◽

Sun-Hee Lee ◽

Jens Kuhn ◽

...

Keyword(s):

Deep Brain Stimulation ◽

Nucleus Accumbens ◽

Obsessive Compulsive Disorder ◽

Brain Stimulation ◽

Treatment Resistant ◽

Obsessive Compulsive ◽

Compulsive Disorder ◽

One Year ◽

Deep Brain ◽

Stimulation Of

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Nitrogen fixation as influenced by pesticides and rice straw in paddy soils

The Journal of Agricultural Science ◽

10.1017/s0021859600080059 ◽

1987 ◽

Vol 108 (3) ◽

pp. 635-638 ◽

Cited By ~ 4

Author(s):

P. K. Jena ◽

V. Rajaramamohan Rao

Keyword(s):

Nitrogen Fixation ◽

Rice Straw ◽

Water Regime ◽

Alluvial Soil ◽

Paddy Soils ◽

Combined Application ◽

Incubation Study ◽

Straw Amendment ◽

Straw Application ◽

Stimulation Of

SummaryThe effect of three herbicides and an insecticide combination on nitrogen fixation in three paddy soils was investigated in a laboratory incubation study. The influence of pesticide combination on N2 fixation was evaluated in the presence and absence of rice straw under flooded and non-flooded conditions. In a non-flooded alluvial soil single or combined application of butachlor and carbofuran significantly stimulated N2 fixation. There was no effect on N2 fixation when thiobencarb was applied alone; but with thiobencarb in combination with carbofuran higher N2 fixation occurred. Both oxadiazone and thiobencarb had no effect on N2 fixation under flooded conditions, but in combination with carbofuran the N2 fixation was high. In acid sulphate saline Pokkali soil, rice straw application stimulated N2 fixation; the stimulatory effect of carbofuran either alone or in combination became more pronounced under flooded conditions. N2 fixation was low in a laterite Sukinda soil and the effect of pesticides was not changed by rice straw amendment. A uniform stimulation of N2 fixation occurred in soils when carbofuran was applied either singly or in combination with other herbicides tested. Results indicate that the effect of pesticides on N2 fixation varied with the rice straw application and water regime.

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Nitrogen fixation (C2H2reduction) as influenced by sulphate in paddy soils

The Journal of Agricultural Science ◽

10.1017/s0021859600063929 ◽

1986 ◽

Vol 106 (2) ◽

pp. 331-336 ◽

Cited By ~ 2

Author(s):

J. L. N. Rao ◽

V. Bajaramamohan Rao

Keyword(s):

Nitrogen Fixation ◽

Soil Ph ◽

Nitrogenase Activity ◽

Alluvial Soil ◽

Paddy Soils ◽

Alkaline Soil ◽

Apparent Effect ◽

Flooded Soils ◽

Water Regimes ◽

Stimulation Of

SUMMARYThe influence of addition of sulphate on acetylene reduction in three paddy soils differing in their properties under two water regimes was investigated in a laboratory experiment. Nitrogenase activity was high in a P-deficient alkaline soil and addition of sulphate further enhanced the activity under two water regimes, with a pronounced stimulation under non-flooded conditions. Sulphate application to submerged alluvial soil enhanced nitrogenase activity with no apparent effect under non-flooded conditions. In acid sulphate saline Pokkali soil sulphate addition had little effect on the nitrogenase activity. Sulphate addition did not result in significant changes in the soil pH and redox potential. No relationship seemed to exist between the sulphate disappearance and stimulation of nitrogenase in these soils. A differential stimulation of N2-fixing microorganisms was noticed as a result of sulphate application. Results suggest that sulphate-induced stimulation of nitrogenase activity occurs in non-flooded soils.

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Nerve transfer for restoration of lower motor neuron-lesioned bladder function. Part 3: Correlation between histological changes and nerve evoked contractions

AJP Regulatory Integrative and Comparative Physiology ◽

10.1152/ajpregu.00300.2020 ◽

2021 ◽

Author(s):

Mary F Barbe ◽

Courtney L Testa ◽

Geneva E. Cruz ◽

Nagat Frara ◽

Ekta Tiwari ◽

...

Keyword(s):

Smooth Muscle ◽

Contractile Function ◽

Ex Vivo ◽

Bladder Function ◽

Detrusor Muscle ◽

Axon Density ◽

Spinal Roots ◽

One Year ◽

Intramural Ganglia ◽

Stimulation Of

We determined the effect of pelvic organ decentralization and reinnervation one year later on urinary bladder histology and function. Nineteen canines underwent decentralization by bilateral transection of all coccygeal and sacral (S) spinal roots, dorsal roots of lumbar (L)7 and hypogastric nerves. After exclusions, 8 were reinnervated 12 months post-decentralization with obturator-to-pelvic and sciatic-to-pudendal nerve transfers, then euthanized 8-12 months later; four served as long-term decentralized only animals. Before euthanasia, pelvic or transferred nerves and L1-S3 spinal roots were stimulated and maximum detrusor pressure (MDP) recorded. Bladder specimens were collected for histological and ex vivo smooth muscle contractility studies. Both reinnervated and decentralized animals showed less or denuded urothelium, fewer intramural ganglia, and more inflammation and collagen, than controls, although percent muscle was maintained. In reinnervated animals, pgp9.5+ axon density was higher, compared to decentralized animals. Ex vivo smooth muscle contractions in response to KCl correlated positively with submucosal inflammation, detrusor muscle thickness, pgp9.5+ axon density. In vivo, reinnervated animals showed higher MDP after stimulation of L1-L6 roots, compared to their transected L7-S3 roots, and reinnervated and decentralized animals showed lower MDP than controls after stimulation of nerves (due likely to fibrotic nerve encapsulation). MDP correlated negatively with detrusor collagen and inflammation, and positively with pgp9.5+ axon density and intramural ganglia numbers. These results demonstrate that bladder function can be improved by transfer of obturator nerves to pelvic nerves at one year after decentralization, although the fibrosis and inflammation that developed were associated with decreased contractile function.

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