Metabolic Activity and Phosphate-Dissolving Capability of Bacterial Isolates From Wheat Roots, Rhizosphere, and Non-Rhizosphere Soil

Katznelson, H.; Bose, B. C.

doi:10.1139/m59-010

Cited by 166 publications

(66 citation statements)

References 6 publications

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“…The production of siderophores was evaluated according to Schwyn & Neilands (1987). The ability to solubilize phosphates was determined by the method proposed by Katznelson & Bose (1959).…”

Section: Physiological Characterization Of Streptomycete Isolatesmentioning

confidence: 99%

Characterization of streptomycetes with potential to promote plant growth and biocontrol

Sousa¹,

Soares

Garrido³

2008

Sci. agric. (Piracicaba, Braz.)

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Studies with streptomycetes in biocontrol programs and plant growth promotion are presented as technological alternatives for environmental sustainable production. This work has the objective of characterizing six isolates of streptomycetes aiming the production of extracellular enzymes, indole acetic acid, capacity for phosphate solubilization, root colonization and growth under different pH and salinity levels. For detection of enzyme activity the isolates were grown in culture media with the enzyme substrates as sole carbon source. The root colonization assay was performed on tomato seedlings grown on 0.6% water-agar medium. Growth under different pH and salinity levels was evaluated in AGS medium with 1%, 1.5%, 2%, 2.5%, and 3% NaCl, and pH levels adjusted to 5.0, 5.5, 6.0, 6.5, and 7.0. All isolates produced the enzymes amylase, catalase, and lipase, as well as indole acetic acid. With one exception (AC-92), all isolates presented cellulolytic and chitinolytic activity, and only AC-26 did not show xylanolytic activity. The isolates AC-147, AC-95, and AC-29 were the highest producers of siderophores. The isolates AC-26 and AC-29 did not show capacity for phosphate solubilization. All isolates colonized tomato roots in vitro, and AC-92 grew under all pH and salinity levels tested. The streptomycetes tested were considered as potential biocontrol and plant growth promotion agents. Key words: actinomycetes, indole acetic acid, extracellular enzymes, siderophores CARACTERIZAÇÃO DE ESTREPTOMICETOS COM POTENCIAL PARA PROMOÇÃO DE CRESCIMENTO DE PLANTAS E BIOCONTROLERESUMO: Estudos com estreptomicetos em programas de biocontrole e promoção de crescimento de plantas são alternativas tecnológicas de produção sustentáveis ao ambiente. O presente trabalho teve como objetivo caracterizar seis isolados de estreptomicetos quanto à produção de enzimas extracelulares, ácido indolacético e sideróforos, capacidade de solubilização de fosfatos, colonização radicular e de crescimento em diferentes níveis de pH e salinidade. Para detectar a produção das enzimas extracelulares, os isolados foram cultivados em meio de cultura contendo os substratos dessas enzimas, como única fonte de carbono. Para determinar a capacidade de colonizar o sistema radicular, sementes de tomate foram cultivadas em meio ágar-água 0,6% e inoculadas com os estreptomicetos. O crescimento em diferentes níveis de salinidade e pH foram avaliados em meio de cultura AGS, com os níveis de NaCl 1%, 1,5%, 2%, 2,5% e 3% e níveis de pH ajustados em 5,0, 5,5, 6,0, 6,5 e 7,0.

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“…The production of siderophores was evaluated according to Schwyn & Neilands (1987). The ability to solubilize phosphates was determined by the method proposed by Katznelson & Bose (1959).…”

Section: Physiological Characterization Of Streptomycete Isolatesmentioning

confidence: 99%

Characterization of streptomycetes with potential to promote plant growth and biocontrol

Sousa¹,

Soares

Garrido³

2008

Sci. agric. (Piracicaba, Braz.)

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“…The capacity of bacterial isolates to solubilize phosphate depends upon the zone/site of their origin [4]. Those derived from rhizoplanes have the highest capacity; rhizosphere organisms have intermediate capacity while those from bulk soils have the least phosphate solubilizing activity.…”

Section: Introductionmentioning

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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“…(Kim et al, 2004). 유용 미생물의 농 업적 활용으로는 농업 부산물의 부숙 촉진효과 (Darbyshire and Greaves, 1973) 및 생물학적 방제제로 살균 및 살충력을 이용한 생물 농약 (Kloepper et al, 1988;Schippers et al, 1987), 미생물이 분비하는 각종 영양 및 생리활성물질 활용 (Duff et al, 1963;Katznelson and Bose, 1959;Okon et al, 1988) (Kim et al, 2002). 유용 미생물로 사상균, 방선균, 효모 및 세균 등이 이 용되고 있으며, 세균으로는 Bacillus속이 많이 이용이 되고 있다 (Lynch, 1982).…”

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Effect of Bacillus subtilis S37-2 on Microorganisms in Soil and Growth of Lettuce (Lactuca sativa)

Heo¹,

Kim²,

Choi³

et al. 2016

Korean Journal of Soil Science and Fertilizer

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The present study evaluated the variations in soil microbial population of controlled horticultural land used for lettuce (Lactuca sativa) cultivation by their fatty acid methyl ester and chemical properties. We utilized four treatment groups, no treatment (NT), culture medium (CM), Bacillus subtilis S37-2 (KACC 91281P) × 10 6 CFU mL -1 (BS1), and Bacillus subtilis S37-2 × 10 7 CFU mL -1 (BS2) and analyzed these variations throughout the before treatment and harvesting stage. The chemical properties such as pH, organic matter, available phosphate, and electrical conductivity in soils before treatment and harvesting stage showed no significant difference among the treatments. Total numbers of bacteria and microbial biomass C in soil treated with BS1 were larger than those of NT, CM, and BS2, whereas total number of fungi at the harvesting stage was significantly lower in the BS1 soil than in the NT and CM soils (P < 0.05). On basis of leaf length, leaf width, leaf number and leaf weight, the growth characteristics lettuce on the soil treated with BS1 and BS2 was faster than those of NT and CM soils. Yield of lettuce with treated BS1 and BS2 were 35% and 29% more than that of NT, respectively.

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Metabolic Activity and Phosphate-Dissolving Capability of Bacterial Isolates From Wheat Roots, Rhizosphere, and Non-Rhizosphere Soil

Cited by 166 publications

References 6 publications

Characterization of streptomycetes with potential to promote plant growth and biocontrol

Characterization of streptomycetes with potential to promote plant growth and biocontrol

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

Effect of Bacillus subtilis S37-2 on Microorganisms in Soil and Growth of Lettuce (Lactuca sativa)

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