Phosphate-solubilizing bacteria as inoculants for agriculture: use of updated molecular techniques in their study

Igual, José Mariano; Valverde, Ángel; Cervantés, Emilio; Velázquez, Encarna

doi:10.1051/agro:2001145

Cited by 177 publications

(87 citation statements)

References 51 publications

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“…The greater yield response due to dual inoculation with VAM fungus and PSB compared with PSB alone can be attributed to the activity of the VAM fungus in transporting extra phosphorus, together with the micronutrients solubilized by PSB, from the root zone and beyond into the plant roots, since in the absence of VAM hyphae these become refixed by soil constituents during the course of slower diffusion towards the plant roots. These results are in accordance with the findings of Tomar et al (2001), El-Fayoumi and Ramadan, (2002), Potdukhe and Guldekar (2003), El-Ghandour and Galal (2002), Koreish et al (2004) and Igual et al (2001). The interaction of phosphorus levels, FYM and biofertilizers was found to be significant in increasing the seed yield of soybean ( Table 2).…”

Section: Crop Yieldsupporting

confidence: 91%

Effect of integrated nutrient management in a soybean-wheat crop sequence on the yield, micronutrient uptake and post-harvest availability of micronutrients on typic ustochrepts soil

Dadhich

Somani

2007

Acta Agronomica Hungarica

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A field experiment using various levels of phosphorus, farmyard manure (FYM) and biofertilizers was undertaken at Udaipur during 2001-02 and 2002-03 to observe the direct effect of the treatments on the yield and micronutrient uptake of soybean and their residual effect on the yield and micronutrient utilization of a subsequent wheat crop. The results revealed that the seed/grain yield of soybean and wheat significantly increased with the application of increasing levels of P, FYM and biofertilizers. The integrated use of P, FYM and biofertilizers was able to replace 20 kg P 2 O 5 ha -1 to soybean and 10 kg P 2 O 5 ha -1 to wheat. The application of increasing levels of P, FYM and biofertilizers significantly enhanced the uptake of Zn, Cu, Mn and Fe by soybean and wheat. Among the biofertilizers, dual inoculation with phosphate-solubilising bacteria (PSB) + vesicular arbuscular mycorrhiza (VAM) gave the best performance. The integrated use of P levels and biofertilizers significantly improved the Zn and Fe uptake of soybean. The highest Zn and Fe uptake (125.77 mg kg -1 and 562.03 mg kg -1 , respectively) was recorded with the combined use of 40 kg P 2 O 5 ha -1 + dual inoculation. The application of FYM and P levels resulted in a significant improvement in the organic carbon, CEC, available N and P, porosity and hydraulic conductivity of the soil after the wheat harvest. Among the biofertilizers, dual inoculation led to maximum soil-available P. Phosphorus application gave a significant decrease in the DTPA-extractable Zn and Fe content of the soil after the harvest of wheat. FYM application significantly enhanced the DTPA-extractable Zn, Cu, Mn and Fe contents of the soil.

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Section: Crop Yieldsupporting

confidence: 91%

Effect of integrated nutrient management in a soybean-wheat crop sequence on the yield, micronutrient uptake and post-harvest availability of micronutrients on typic ustochrepts soil

Dadhich

Somani

2007

Acta Agronomica Hungarica

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“…In contrast, precipitation occurs in alkaline soils due to the presence of calcium; this results in less efficient solubilization of phosphate fertilizers (Igual et al 2001).…”

Section: Introductionmentioning

confidence: 99%

Phosphate solubilization by endophytic bacteria isolated from banana trees

Matos

Gomes

Nietsche

et al. 2017

An. Acad. Bras. Ciênc.

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Forty isolates of endophytic bacteria isolated from banana tree roots were assessed as to their capacity to solubilize phosphate in a solid culture medium supplemented with different inorganic and one organic source of phosphorus. The amount of phosphorus (P) in each liquid medium was quantified, and an indirect assessment of acid phosphatase activity was performed. All assays had a fully randomized design, with three repetitions. Approximately 67.5% of the 40 isolates assessed in solid medium solubilized phosphorus from tricalcium phosphate and 7.5% of the isolates solubilized phosphorus from soy lecithin; no isolates exhibited P solubilization capacity in medium supplemented with iron phosphate . Acid phosphatase activity was detected in 65% of the isolates; Aneurinibacillus sp. and Lysinibacillus sp. isolates presented with the best solubilization indexes. All of the assessed isolates exhibited a capacity to reduce the potential of hydrogen in liquid medium supplemented with tricalcium phosphate. Isolate EB. 78 (Bacillus sp.) exhibited P solubilization capacity in solid media when Ca 3 (PO 4 ) 2 and soy lecithin were used as P sources; this isolate significantly reduced the pH of the liquid medium and exhibited acid phosphatase activity. The results of the present study highlight isolates that exhibit variations in their capacity to solubilize P. These isolates should be used in future tests to assess their field performance.

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“…The application of AM fungi led to noteworthy enhancements on plant growth, vigour, nutrient and water uptake, disease resistance and drought tolerance (Raj et al, 1981;Jeffries et al, 2003;Sanchez-Blanco et al, 2004;Göhre and Paszkowski, 2006;Wu and Xia, 2006). Plant growth promoting rhizobacteria (PGPR), especially phosphate solubilizing bacteria (PSB), which reside in the plant rhizosphere, increase the availability of P for the plants by solubilization of bound P in soil (Illmer et al, 1995;Rodriguez and Fraga, 1999;Igual et al, 2001). Due to limited diffusion and formation of a Pi-depletion zone surrounding the root system, the phosphate made available by PSB from sparingly soluble inorganic P (Pi) sources may not reach the root surface, therefore it was proposed that if the solubilized phosphate was taken up first by AM mycelium, this synergistic microbial interaction should improve P supply to the plant.…”

Section: Introductionmentioning

confidence: 99%

Synergistic effect of phosphate solubilizing rhizobacteria and arbuscular mycorrhiza on growth and yield of wheat plants

Minaxi

Saxena²,

Chandra

et al. 2013

J. Soil Sci. Plant Nutr.

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The present communication is an attempt to explore the synergistic effect of two indigenous phosphate solubilizing bacteria (PSB) (Pseudomonas fluorescens BAM-4 and Burkholderia cepacia BAM-12) and arbuscular mycorrhizal (AM) fungus, Glomus etunicatum on growth, yield and nutrient uptake of wheat plants grown in nutrient deficient soils in pots amended with tricalcium phosphate (TCP). A significant increase in growth, yield and nutrient uptake of wheat plants was noticed and both strains of PSB interacted positively with AM fungus towards all growth parameters studied. A remarkable enhancement of seed yield was recorded notably by 92.8% and an increase in percent root colonization of AM and PSB population in soil was also recorded with time.

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Phosphate-solubilizing bacteria as inoculants for agriculture: use of updated molecular techniques in their study

Cited by 177 publications

References 51 publications

Effect of integrated nutrient management in a soybean-wheat crop sequence on the yield, micronutrient uptake and post-harvest availability of micronutrients on typic ustochrepts soil

Effect of integrated nutrient management in a soybean-wheat crop sequence on the yield, micronutrient uptake and post-harvest availability of micronutrients on typic ustochrepts soil

Phosphate solubilization by endophytic bacteria isolated from banana trees

Synergistic effect of phosphate solubilizing rhizobacteria and arbuscular mycorrhiza on growth and yield of wheat plants

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