Phosphate solubilisation in solution culture by the soil fungus Penicillium radicum

Whitelaw, Melanie; Harden, T. J.; Helyar, K. R.

doi:10.1016/s0038-0717(98)00130-8

Cited by 297 publications

(144 citation statements)

References 37 publications

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“…Media containing HRP were prepared with different pH values [3][4][5][6][7][8][9]. The sterilization of medium resulted in change of pH which was considered as initial pH.…”

Section: Indiamentioning

confidence: 99%

“…Microbes are involved in a range of process that effect the transformation of soil phosphorus and thus are the integral component of the soil 'P' cycle. Many bacterial [3][4][5], fungal [6][7][8], yeast [9,10] and actinomycete [11] species capable of solubilizing sparingly soluble phosphorus in pure culture have been isolated and studied. Several mechanisms such as lowering pH by acid production, chelation and exchange reaction in the growth environment have been reported to play a role in P solubilization by phosphate solubilizers.…”

Section: Introductionmentioning

confidence: 99%

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Rock phosphate dissolution by specific yeast

2009

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Phosphate solubilizing yeast (PSY) were isolated from rhizosphere, non-rhizosphere and fruits from Bhavnagar district. The potential of 25 yeasts were analyzed on the basis of phosphate solubilizing zone to growth on solid medium denoted as solubilization index (SI) which ranged from 1.10 to 1.50. Among 25 yeast isolates, 6 yeast belonging to genus Saccharomyces (2), Hansenula, Klockera, Rhodotorula and Debaryomyces exhibited highest SI (1.33-1.50) were further examined for in vitro tricalcium phosphate (TCP) and low grade rock phosphate (RP) solubilization. TCP proved superior to RP with all the yeasts. Within low grade RPs tested, except isolate Y5, all isolates showed maximum solubilization with Hirapur RP (HRP) ranging from 7.24 to 19.30 mg% P 2 O 5 . Among six PSY screened, Debaryomyces hansenii showing maximal HRP solubilization was chosen for further physiological studies. Maximum HRP solubilization was expressed in following condition: pH optima 7.0, temperature optima 28°C and optimal period of incubation were 15 days. Acidic pH of the spent media was a constant feature in all the cases. No correlation could be established between fi nal acidity produced by yeasts and the quantity of phosphate liberated.

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“…Media containing HRP were prepared with different pH values [3][4][5][6][7][8][9]. The sterilization of medium resulted in change of pH which was considered as initial pH.…”

Section: Indiamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Rock phosphate dissolution by specific yeast

2009

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“…2). Within these experiments, the pH value of the solution changed inversely to the concentration of soluble P. The solubilization of P is commonly associated with a decrease in pH (Puente et al 2004) and has been reported in fungi as a result of production of various organic acids, including citric acid, gluconic acid (Reyes et al 2001;Whitelaw et al 1999), and oxalic acid (Gharieb 2000). As seen in Fig.…”

Section: Discussionmentioning

confidence: 62%

“…19 9 7 ) , f o u n d a s i m i l a r p h en o m e n on o f Penicillium aurantiogriseum and Pseudomonas sp., which they proposed was likely due to the release of protons accompanying respiration or NH 4 + assimilation as the most probable reason for P solubilization without acid production. Whitelaw et al (1999) proposed that fungus Penicillium radicum may consume more P than it was releasing, resulting in the observed decrease during exponential growth. Therefore, the specific phosphate solubilization mechanism in the soil needs to be further studied.…”

Section: Discussionmentioning

confidence: 99%

Characteristics of metal-tolerant plant growth-promoting yeast (Cryptococcus sp. NSE1) and its influence on Cd hyperaccumulator Sedum plumbizincicola

Liu

Wang

et al. 2016

Environ Sci Pollut Res

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Plant growth-promoting yeasts are often over looked as a mechanism to improve phytoremediation of heavy metals. In this study, Cryptococcus sp. NSE1, a Cd-tolerant yeast with plant growth capabilities, was isolated from the rhizosphere of the heavy metal hyperaccumulator Sedum plumbizincicola. The yeast exhibited strong tolerance to a range of heavy metals including Cd, Cu, and Zn on plate assays. The adsorption rate Cd, Cu, Zn by NSE1 was 26.1, 13.2, and 25.2 %, respectively. Irregular spines were formed on the surface of NSE1 when grown in MSM medium supplemented with 200 mg L −1 Cd. NSE1 was capable of utilizing 1-aminocyclopropane-1-carboxylate (ACC) as a sole nitrogen source and was capable of solubilization of inorganic phosphate at rates of 195.2 mg L −1 . Field experiments demonstrated that NSE1 increased phytoremediation by increasing the biomass of Cd hyperaccumulator S. plumbizincicola (46 %, p < 0.05) during phytoremediation. Overall, Cd accumulation by S. plumbizincicola was increased from 19.6 to 31.1 mg m −2 though no difference in the concentration of Cd in the shoot biomass was observed between NSE1 and control. A Cd accumulation ratio of 38.0 % for NSE1 and 17.2 % for control was observed. The HCl-extractable Cd and CaCl 2 -extractable Cd concentration in the soil of the NSE1 treatment were reduced by 39.2 and 29.5 %, respectively. Community-level physiology profiling, assessed using Biolog Eco plates, indicated functional changes to the rhizosphere community inoculated with NSE1 by average well color development (AWCD) and measurement of richness (diversity). Values of Shannon-Weiner index, Simpson index, and McIntosh index showed a slight but no significant increases. These results indicate that inoculation of NSE1 could increase the shoot biomass of S. plumbizincicola, enhance the Cd accumulation in S. plumbizincicola, and decrease the available heavy metal content in soils significantly without overall significant changes to the microbial community.

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“…Whitelaw et al (1999) verificaram que Penicillium radicum solubilizou Ca 3 (PO 4 ) 2 , CaHPO 4 , FePO 4 .4H 2 O e AlPO 4 em meio líquido. Reyes et al (1999) encontraram correlação positiva entre a solubilização de fosfatos por Penicillium rugulosum e a produção de ácido glucônico ou cítrico.…”

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Solubilização de fosfatos em meios sólido e líquido por bactérias e fungos do solo

Souchie

Azcón

Barea

et al. 2005

Pesq. agropec. bras.

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Resumo -O objetivo deste trabalho foi avaliar a capacidade e a eficiência de solubilização de CaHPO 4 , AlPO 4 e apatita de Araxá em meio sólido, e de AlPO 4 e apatita de Araxá em meio líquido, por fungos (Aspergillus) e bactérias (Enterobacteriaceae) do solo. Em meio sólido, todos solubilizaram CaHPO 4 , nenhum solubilizou apatita de Araxá e apenas o isolado de fungo FSF 7 solubilizou AlPO 4 . Em meio líquido, todos solubilizaram AlPO 4 e apatita de Araxá. A seleção de solubilizadores deve ser feita com a quantificação do potencial de solubilização em meio líquido.Termos para indexação: Aspergillus, enterobactérias, fósforo, meio de cultivo, apatita. Phosphate solubilization in solid and liquid media by soil bacteria and fungiAbstract -The objective of this work was to evaluate the ability and efficiency of solubilization of CaHPO 4 , AlPO 4 and Araxá apatite in solid medium, and AlPO 4 and Araxá apatite in liquid medium. Soil P-solubilizing fungi (Aspergillus) and P-solubilizing bacteria (Enterobacteriaceae) were tested. In solid medium, all isolates solubilized CaHPO 4 , not any isolate solubilized Araxá apatite, and one fungus isolate (PSF 7) solubilized AlPO 4 . In liquid medium, all isolates solubilized AlPO 4 and Araxá apatite. Screening of P-solubilizing microorganisms must be done by quantifying their potential of phosphate solubilization in liquid growth medium.

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Phosphate solubilisation in solution culture by the soil fungus Penicillium radicum

Cited by 297 publications

References 37 publications

Rock phosphate dissolution by specific yeast

Rock phosphate dissolution by specific yeast

Characteristics of metal-tolerant plant growth-promoting yeast (Cryptococcus sp. NSE1) and its influence on Cd hyperaccumulator Sedum plumbizincicola

Solubilização de fosfatos em meios sólido e líquido por bactérias e fungos do solo

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