Organic acid mediated P mobilization in the rhizosphere and uptake by maize roots

Ström, Lena; Owen, Andrew; Godbold, Douglas L.; Jones, Davey L.

doi:10.1016/s0038-0717(01)00235-8

Cited by 153 publications

(83 citation statements)

References 32 publications

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“…Except for oxalate in the soil poor in Fe ox , the mineralization rate was higher or similar to in the soils supplied with P than in the control soils, consistent with the idea that P promotes soil microbial activity. The low mineralization rate of oxalate in soil poor in Fe ox not previously supplied with organic acids (treatments -P and +P) agree with previous data on the resistance of oxalate to microbial degradation (Ström et al, 2002) and may have relationship with the rapid precipitation of Ca oxalate in a calcareous soil not previously supplied with this anion. However, the mineralization patterns of oxalate in soil rich in Fe ox differ markedly from those of the soil poor in Fe ox .…”

Section: Plant Growthsupporting

confidence: 89%

Organic acids alleviate iron chlorosis in chickpea grown on two p-fertilized soils

Sánchez‐Rodríguez¹,

Campillo²,

Torrent³

et al. 2014

J. Soil Sci. Plant Nutr.

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The objectives of this paper are to investigate the response of chickpea growing on two iron (Fe) chlorosisinducing calcareous soils, with different Fe availability, generously supplied with phosphate (P), and to evaluate the effectiveness of a mixture of organic acids (citric, oxalic and malic) to alleviate Fe chlorosis symptoms. Application of P (+P treatment) aggravated Fe deficiency irrespective of the soil. Phosphorus-induced Fe chlorosis was alleviated when organic acids were also applied to the soil (+P+OA treatment), which was reflected in increased leaf chlorophyll concentration and decreased root ferric reductase activity in the plants growing on both soils; the effect was stronger for plants grown on the soil with the lowest Fe-available content. However, Fe chlorosis was still more severe than in the control (-P treatment) plants. The need of -P treatment plants to explore soil in order to take up nutrients is reflected in their root architecture, reduced root diameter and increased length, surface and volume relative to +P and +P+OA roots. Organic acids alleviate Fe chlorosis in function of non crystalline Fe oxides content but inhibit the root response mechanisms as a consequence of increasing Fe concentration in the soil solution.

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Section: Plant Growthsupporting

confidence: 89%

Organic acids alleviate iron chlorosis in chickpea grown on two p-fertilized soils

Sánchez‐Rodríguez¹,

Campillo²,

Torrent³

et al. 2014

J. Soil Sci. Plant Nutr.

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“…The fact that oxalate was the only organic anion detetected in most of the growing media (results not shown) is consistent with previous works showing that this compound is the main anion released by plant roots under P-deficient conditions (Jones 1998, Ström et al 2005. Organic anions released by plants or bacteria can compete for sorption sites and facilitate P desorption as a result; also they can enhance dissolution of sparingly soluble phosphates (Ström et al 2002(Ström et al , 2005. However, inoculation with B. subtilis decreased the concentration of organic acids in the rhizospheric medium.…”

Section: Resultssupporting

confidence: 91%

Effect of Bacillus subtilis on phosphorus uptake by cucumber as affected by iron oxides and the solubility of the phosphorus source

García‐López

Delgado

2016

AFSci

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In this work, we examined the effects of Bacillus subtilis strain QST713 by assessing plant P uptake from variably P compounds. The experiment performed involved three factors: (i) P source (KH 2 PO4 at 100 mg kg -1 , and phosphate rock [PR] at 100 or 200 mg kg -1 ); (ii) plant inoculation with QST713 (inoculated and non-inoculated); and (iii) Fe oxide (ferrihydrite) in the growth medium (0 or 300 mg kg -1 concentration of citrate-ascorbate-extractable Fe). Ferrihydrite decreased dry matter yield in plants by more than 50 %. Inoculation with QST713 increased plant growth, and total accumulation of P by plants and P uptake, estimated as the total P in aerial parts and roots minus P present in seeds. Overall, QST713 increased P uptake by 40 %, the effect being independent of the presence of ferrihydrite and P source. The increased P uptake observed can be ascribed to solubilization of P and to increased root growth. Therefore, QST713 improves P nutrition in plants grown on media with a high P adsorption capacity irrespective of the solubility of the P compound.

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“…LIU et al (2004), studying maize genotypes with contrasting efficiency for the adsorption of phosphorus, concluded that, the greater root system, allied to a better ability of acidify the rhizosphere and excrete phosphatase in the root zone, are the main characteristics of the efficient genotype in the adsorption of this element. STRÖM et al (2002) observed that the addiction of organic oxalate acid in the root zone increased approximately two times the accumulation of phosphorus in the maize shoots.…”

Section: Introductionmentioning

confidence: 97%

Effect of green manure and sources of phosphorus on the morphology and yield of maize plants

Umburanas

Kawakami

Eschemback

et al. 2013

Revista Brasileira De Tecnologia Aplicada Nas Ciências Agrárias

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The aim of this study was to evaluate the behavior of the maize crop in succession to different species of green manures, with different sources of phosphorus and their interaction. A completely randomized block in a split plot design was used, with three main treatments and seven secondary treatments, with three replications. The treatments consisted of three sources of phosphorus (plots) and six species of green manures (subplots). It was used maize plants of cultivar Premium Flex ® . It were evaluated plant height, leaf number, stem diameter, leaf area index, leaf and stem dry weight, specific leaf area, ear number, mass of one hundred grains, stand and yield. There was no interaction effect on all traits. However, the dry weight of stem and seed yield showed significant difference between the sources of phosphorus, with positive results for both sources of phosphorus in relation to the control. This suggests that the shoot dry weight is responsive to the presence of phosphorus. It was observed that the phosphate rock has potential to achieve crop yield similar to that obtained with superphosphate.

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Organic acid mediated P mobilization in the rhizosphere and uptake by maize roots

Cited by 153 publications

References 32 publications

Organic acids alleviate iron chlorosis in chickpea grown on two p-fertilized soils

Organic acids alleviate iron chlorosis in chickpea grown on two p-fertilized soils

Effect of Bacillus subtilis on phosphorus uptake by cucumber as affected by iron oxides and the solubility of the phosphorus source

Effect of green manure and sources of phosphorus on the morphology and yield of maize plants

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