Phosphate-Solubilizing Bacteria and Fungi in Various Cultivated and Virgin Alberta Soils

Kucey, R. M. N.

doi:10.4141/cjss83-068

Cited by 320 publications

(171 citation statements)

References 9 publications

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“…Thus, PSF appear to be highly effi cient in mobilizing the natural reservoir of the element [29]. Kucey [30] stated that fungi in soil are able to traverse distances more easily as compared to bacteria, henceforth, more important in context to P-solubilization in soils.…”

Section: Discussionmentioning

confidence: 99%

Relationship of physicochemical properties of rhizosphere soils with native population of mineral phosphate solubilizing fungi

Narsian

Patel

2009

Indian J Microbiol

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Phosphate solubilizing fungi (PSF) were enumerated in 78 rhizosphere soil samples collected from various sites of Bhavnagar district with agro climatic zone of hot, semi-arid region of Gujarat. 81% of samples were inhabited with indigenous PSF; the count varied ranging from 0.01 to 90 × 10 3 PSF g -1 . PSF population in the rhizosphere soils were maximal at pH 7.4-8.4, electrical conductivity (EC) 1-2 dS m -1 wherein PSF population decreased with a rise in EC. Optimal moisture content ranged ≤10-30% where the abundance of PSF always decreased with increase in moisture levels while suitable organic matter content ranged from ≤0.5-4.5%. Available P range 100-300 mg kg -1 was the most suitable for occurrence of PSF as being noticed from number of soil samples harboring them in rhizosphere soils. Amongst the various rhizosphere soil properties studied, a highly signifi cant positive correlation was established between PSF and soil available P as well as pH. A signifi cant positive association observed between total fungal population and organic matter as well as soil available P. Both abundance and number of PSF were more pronounced in descending order in plant covers: oilseeds, fl owers, orchards, vegetables, pulses and cereals.

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Section: Discussionmentioning

confidence: 99%

Relationship of physicochemical properties of rhizosphere soils with native population of mineral phosphate solubilizing fungi

Narsian

Patel

2009

Indian J Microbiol

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“…To better characterize the antifungal isolates, their potential production of hydrolytic enzymes and secondary metabolites was studied. Previously described methods were used to assess chitinolytic activity in minimal medium [11], siderophore production [51], amylase activity [14], cellulase activity [16], phosphorus dissolution [25], and nitrogen fixation [22]. Protease activity indicated by casein degradation was determined from distinct zones of clearing in skim milk agar (50 ml sterilized skimmed milk mixed at 55°C with 50 ml of 1/5…”

Section: Elucidation Of Antifungal Spectrum Of the Selected Antagonistsmentioning

confidence: 99%

Biocontrol activities of bacteria from cowdung against the rice sheath blight pathogen

Yang

Zhang²,

YiQing

et al. 2017

J Plant Dis Prot

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To discover bacteria with potential biocontrol activity against the rice sheath blight (RSB) pathogen, Rhizoctonia solani, cowdung (CD) associated bacteria were screened for antifungal activity a dual-culture method. Five potential biocontrol bacteria were identified to species-level based on their colony morphology, physiology, biochemical characteristics, utilization of carbon sources, micromorphology and 16S rRNA sequences. The ability of two selected strains to inhibit RSB was evaluated in vivo and in vitro. The median effective concentration (EC 50 ) of crude extract from Streptomyces cochorusii strain NF0919 (NF0919) culture filtrate was 1.3 lg ml -1 , lower than the EC 50 of Jinggangmycin (a commercial antifungal agent widely used in China). At a concentration of 25.0 lg ml -1 , the crude extract completely inhibited mycelial growth of R. solani. The field biocontrol efficacy after spraying 7 days in 2013 and in 2014 was 78.4 and 98.1% with crude extract from NF0919 culture filtrate and 71.1 and 94.2% with fresh cells of Bacillus amyloliquefaciens strain SB177 (SB177). Results from the 2-year field experiment suggested that the crude extract from NF0919 culture filtrate or fresh cells of SB177 provided better disease control than other fungicides (Jinggangmycin and/ or Kresoxim-methyl). S. cochorusii strain NF0919 and B. amyloliquefaciens strain SB177 have good potential for field application and commercial use against the RSB pathogen.

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“…Although P-solubilizing bacteria (PSB) have received greater attention than P-solubilizing fungi (PSF), the latter are more effective in solubilizing P compounds (Kucey 1983;Whitelaw et al 1997). Moreover, PSF do not lose the P dissolving activities upon repeated subculturing under laboratory conditions as the PSB do (Kucey 1983;Rashid et al 2004).…”

Section: Introductionmentioning

confidence: 99%

“…Phosphorous-solubilizing microorganisms (PSM) are able to replenish soil solution P by solubilizing insoluble native and applied rock phosphate (Rao 1992;Gyaneshwar et al 2002b;Khan et al 2007). Although P-solubilizing bacteria (PSB) have received greater attention than P-solubilizing fungi (PSF), the latter are more effective in solubilizing P compounds (Kucey 1983;Whitelaw et al 1997). Moreover, PSF do not lose the P dissolving activities upon repeated subculturing under laboratory conditions as the PSB do (Kucey 1983;Rashid et al 2004).…”

Section: Introductionmentioning

confidence: 99%

Interactions between arbuscular mycorrhizal fungi and phosphate-solubilizing fungus (Mortierella sp.) and their effects on Kostelelzkya virginica growth and enzyme activities of rhizosphere and bulk soils at different salinities

et al. 2011

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Phosphate-Solubilizing Bacteria and Fungi in Various Cultivated and Virgin Alberta Soils

Cited by 320 publications

References 9 publications

Relationship of physicochemical properties of rhizosphere soils with native population of mineral phosphate solubilizing fungi

Relationship of physicochemical properties of rhizosphere soils with native population of mineral phosphate solubilizing fungi

Biocontrol activities of bacteria from cowdung against the rice sheath blight pathogen

Interactions between arbuscular mycorrhizal fungi and phosphate-solubilizing fungus (Mortierella sp.) and their effects on Kostelelzkya virginica growth and enzyme activities of rhizosphere and bulk soils at different salinities

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