Selecting Indigenous P-Solubilizing Bacteria for Cowpea and Millet Improvement in Nutrient-Deficient Acidic Soils of Southern Cameroon

Fankem, Henri; Abba, Mustapha; Nkot, Laurette Ngo; Deubel, Annette; Merbach, W.; Etoa, François–Xavier; Nwaga, D.

doi:10.1007/978-90-481-2543-2_40

Cited by 10 publications

(13 citation statements)

References 22 publications

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“…did not showed any visible halo zone on plates amended with Moroccan and Mexican rock phosphates, it could conversely mobilized important amounts of phosphorus from these rock phosphate sources and could be considered as rock phosphate solubilisers. These contradictory results between plate halo detection and phosphate solubilisation in liquid cultures found earlier by Deubel and Merbach [24] and Fankem et al [25] indicates that liquid culture should be associated to halo zone for rock phosphate solubilisers characterization. However, the plate method is still a feasible way to pre-screen the isolates that possess phosphate solubilising ability.…”

Section: Discussionmentioning

confidence: 78%

Rock-Phosphate Solubilising Bacteria and their Effect on Soybean (Glycine max) Growth under Pot Grown Conditions

Fankem¹

2014

AJAF

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Abstract:The modern agriculture is dependent on phosphorus (P) derived from phosphate rock. However, the direct application of low-grade rock phosphate as a P source in soils need an addition of inoculums of phosphate solubilising microorganisms to improve the rock phosphate efficiency as a phosphorus source. Phosphate solubilising bacteria (PSB) were screened for their phosphate solubilising ability on plates and in liquid cultures supplemented with Malian, Moroccan or Mexican rock phosphates. They were subsequently tested on soybean grown in pots filled with non sterile soil amended with Moroccan rock phosphate for their aptitude in promoting soybean growth. (810.86, 270.92 and 180.95 µgP/g). In general, Panthoea sp. and Bacillus sp. better contribute to the soybean growth with the effect of 35% and 34% respectively compare to non inoculated control supplied with non soluble Moroccan rock phosphate. The activity of Klebsiella sp. (13%) that is low in general seems to be stimulated when associated with the two other strains (33%). This suggests that the use of rock phosphate combined with the co-inoculation with those strains would ensure soybean production in economically profitable and environmentally friendly conditions.

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Section: Discussionmentioning

confidence: 78%

Rock-Phosphate Solubilising Bacteria and their Effect on Soybean (Glycine max) Growth under Pot Grown Conditions

Fankem¹

2014

AJAF

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“…However, the three strains conversely mobilized important amounts of P in liquid culture supplemented with the same rock phosphates and could be considered as potential biofertilizer strains. These contradictory results between plate halo detection and phosphate solubilisation in liquid cultures were found by Deubel and Merbach (2005) and Fankem et al (2011). This indicates that liquid culture should be associated with halo zone for rock phosphate solubilisers characterization.…”

Section: Discussionmentioning

confidence: 89%

Maize (Zea mays) growth promotion by rock-phosphate solubilising bacteria isolated from nutrient deficient soils of Cameroon

Fankem¹,

Vanessa²,

Laurette³

et al. 2014

Afr. J. Microbiol. Res.

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“…The first phosphate solubilising activity of the strains was assessed on agar plates containing sparingly soluble inorganic phosphates (Ca-P, Al-P, Fe phosphate (Na-phy) as well as rock phosphate plus dye for better observation [9,12,13]. This reaction, shown as a halo or clear or yellow (in the present case) zone on the plate is used to assess the P solubilisation activity of strains with the SI value as an indicator for the strain efficiency.…”

Section: Discussionmentioning

confidence: 99%

“…None of the strains showed any halo zone on plates amended with Moroccan rock phosphate. They conversely mobilised an important amount of P in liquid culture supplemented with the same These contradictory results between plate halo detection and phosphate solubilization in liquid cultures [13] and Deubel and Merbach liquid culture should be associated o halo zone for rock phosphate solubilisers characterization . However, while screening a large number of microorganisms, the halo detection method can be regarded as generally reliable for isolation and preliminary characterization of rock phosphate-solubilising In agreement with the present findings, two Penicillium bilaii and P. cf.…”

Section: Correlation Between Ph and The Solved P At The End Of Thementioning

confidence: 95%

Rock Phosphate Solubilisation by Strains of Penicillium Spp. Isolated from Farm and Forest Soils of three Agro Ecological Zones of Cameroon

Fankem¹

2014

AJAF

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Rock Phosphate (RP) is theoretically the cheapest fertilizer and most abundant, but its direct application in the soils is not always agronomically effective due to its low phosphorus (P) availability. An environmentally friendly and economically alternative to traditional processing of these deposits is the use of Phosphate Solubilising Microorganisms (PSM). Three Penicillium strains were screened for their aptitude in solubilising sparingly soluble phosphates as well as phosphate rock on plates and in broth supplemented with the different phosphate types. The three strains show the ability in solubilising at least two from the sparingly soluble phosphates types, with the solubilisation index (SI) varying from 1.44 to 4.74. All the strains were able to show halo zone on plates supplemented with Malian and Algerian rock phosphates with solubilisation index ranging from 1.2 to 1.8. No halo zone was detected on plates with Moroccan rock phosphate as sole phosphate source. However, significant amount of phosphorus were mobilised by all strains in broth with the different rock phosphates, including the Moroccan rock phosphate. The amount of solved P varied from 257.46 mgP.L-1 (Penicillium sp. 43) to 326.65 mgP.L-1 (Penicillium sp. 109) for Malian rock phosphate, from 152.61 mgP.L-1 (Penicillium sp. 43) to 337.56 mgP.L-1 (Penicillium sp. 27) for Algerian rock phosphate, and from 283.79 mgP.L-1 (Penicillium sp. 43) to 347.16 mgP.L-1 (Penicillium sp. 109) for Moroccan rock phosphate. The rock phosphate solubilisation was associated with pH media drop and both parameters were strongly correlated.

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Selecting Indigenous P-Solubilizing Bacteria for Cowpea and Millet Improvement in Nutrient-Deficient Acidic Soils of Southern Cameroon

Cited by 10 publications

References 22 publications

Rock-Phosphate Solubilising Bacteria and their Effect on Soybean (Glycine max) Growth under Pot Grown Conditions

Rock-Phosphate Solubilising Bacteria and their Effect on Soybean (Glycine max) Growth under Pot Grown Conditions

Maize (Zea mays) growth promotion by rock-phosphate solubilising bacteria isolated from nutrient deficient soils of Cameroon

Rock Phosphate Solubilisation by Strains of Penicillium Spp. Isolated from Farm and Forest Soils of three Agro Ecological Zones of Cameroon

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