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The influence of some factors on phosphate solubilization by microorganisms in bottom sediments of different types

100%

Niewolak S., Korycka A., Krasnicki K.

Polish Journal of Environmental Studies

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1996

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tom 05

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nr 6

This work concerns the influence of temperature, the presence (lack of oxygen and different carbohydrates) on solubilization of tribasic calcium phosphate, iron phosphate and Thomas basic slag in samples of bottom sediments of gyttja, sapropel, "dy" and tyrfopel types from lakes of different trophic lakes of the Mazurian Lake District. In samples of 4 types of bottom sediments more PO4-P from phosphate compounds gathered at 25° C than at lower temperatures in situ in lakes; besides, there were more in anaerobic conditions than in aerobic ones, in bottom sediments samples with Ca3(P04)2 more PO4-P gathered at pH 4-5, in samples with FeP04 at pH 5-6, in samples with Thomas basic slag at pH 4-6. More PO4-P was in samples of bottom sediments with addition of glucose, saccharose, mannose and arabinose, less with the addition of xylose and cellobiose independently from used phosphate compounds. Greater amounts of PO4-P gathered in the samples of bottom sediments of gyttja and sapropel types, lower in the samples of "dy" and tyrfopel types. In all series of the experiments the highest amounts of P04-P gathered in a logarythmic phase of the development of natural population of bacteria.

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Stress-tolerant antagonistic rhizobacteria isolated from the medicinal plant Tinospora cordifolia

72%

Vyas P., Kaur A.

BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology

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2018

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tom 99

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nr 2

3

Stress-tolerant antagonistic plant growth-promoting rhizobacteria from Zea mays

72%

Kaur A., Devi S. R., Vyas P.

Journal of Plant Protection Research

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2018

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tom 58

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nr 2

Biological control of plant diseases is strongly emerging as an effective alternative to the use of chemical pesticides and fungicides. Stress tolerance is an important attribute in the selection of bacteria for the development of microbial inoculants. Fourteen salt-tolerant bacteria showing different morphological features isolated from the rhizosphere of maize were evaluated for different plant growth-promoting activities. All isolates showed auxin production ranging from 5 to 24 μg ⋅ ml–1 after 48 h incubation in tryptophan supplemented media. Phosphate solubilization ranged from 15 to 419 μg ⋅ ml–1. 1-aminocycloproprane- 1-carboxylate (ACC) deaminase activity was shown by 6 isolates, ammonia production by 9 isolates, siderophore production by 8 isolates while HCN production by 4 isolates. Four bacterial isolates with all plant growth-promoting properties also showed strong antagonistic activities against Fusarium oxysporum, F. verticillioides, Curvularia lunata and Alternaria alternata and abiotic stress tolerance against salinity, temperature, pH and calcium salts. Two selected bacterial isolates significantly enhanced the growth of pea and maize test plants under greenhouse conditions. The bacterial isolate M1B2, which showed the highest growth promotion of test plants, was identified as Bacillus sp. based on phenotypic and 16S rDNA gene sequencing. The results indicated that Bacillus sp. M1B2 is a potential candidate for the development of microbial inoculants in stressful environments.

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Culturable endophytic Pseudomonas fluorescens Z1B4 isolated from Zanthoxylum alatum Roxb. with stress-tolerance and plant growth-promoting potential

58%

Vyas P., Kaur R.

BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology

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2021

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tom 102

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nr 3

Ograniczanie wyników

2 BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology

1 Journal of Plant Protection Research

1 Polish Journal of Environmental Studies

3 Vyas P.

2 Kaur A.

1 Devi S. R.

1 Kaur R.

1 Korycka A.

1 Krasnicki K.

1 Niewolak S.

1 2021

2 2018

1 1996

The influence of some factors on phosphate solubilization by microorganisms in bottom sediments of different types

Stress-tolerant antagonistic rhizobacteria isolated from the medicinal plant Tinospora cordifolia

Stress-tolerant antagonistic plant growth-promoting rhizobacteria from Zea mays

Culturable endophytic Pseudomonas fluorescens Z1B4 isolated from Zanthoxylum alatum Roxb. with stress-tolerance and plant growth-promoting potential