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George, Timothy S.; Gregory, P. J.; Robinson, Jenny; Buresh, R. J.

doi:10.1023/a:1021523515707

Cited by 62 publications

(9 citation statements)

References 33 publications

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“…NaHCO 3 -Po accumulation in the rhizosphere under P100 could be explained by the fact that the immobilization of inorganic P into organic P by microorganisms was higher than organic P hydrolysis by phosphatase in the rhizosphere of plants. Similar results have been reported by Zoysa et al (1998) and George et al (2002).…”

Section: Depletion Of Soil Phosphorus Fractions In the Rhizospheresupporting

confidence: 92%

“…In the experiment, urea was the only nitrogen source and it was mainly taken up by plants as therefore the rapeseeds receiving NH 4 + maybe release equivalent amounts of H + in the rhizosphere to counterbalance the corresponding excess of positive charges entering the cell, thereby decreased the rhizosphere pH. Moreover, when supplying a plant with a K 2 SO 4 solution, more cation such as K + were taken up than the anions as SO 4 2− , so H + would be released into the rhizosphere soil to compensate for the excess of positive charges entering the cell (George et al 2002).…”

Section: Rhizosphere Phmentioning

confidence: 99%

“…Through plant roots, microorganism activity and rhizosphere processes affect the biological, physical and chemical properties of rhizosphere soil (George et al 2002;Liu et al 2004;Marschner et al 2007). A considerable increase in acid phosphatase activity was observed in the soil-root interfaces of four species compared to the bulk soil (Tarafdar and Jungk 1987).…”

Section: Introductionmentioning

confidence: 99%

“…Root-associated factors such as root morphology, architecture, root hair density, nutrient absorption rate, ability to modify the rhizosphere and mycorrhizal symbiosis can strongly influence Pi acquisition (Raghothama 1999;López-Bucio et al 2002;Ma et al 2001;Wissuwa and Ae 2001;Schweiger et al 2007). Root exudations by plant roots as amino acids, organic acids (Graham et al 1981;Schwab et al 1983;Li et al 1997;Hinsinger 2001;Shane and Lambers 2005), H + (Yan et al 2002;Wang et al 2006;George et al 2002) and acid phosphatase (Tadano et al 1993;Asmar et al 1995) have also been shown to play important roles in increasing the availability of P.…”

Section: Introductionmentioning

confidence: 99%

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Genotypic differences in phosphorus acquisition and the rhizosphere properties of Brassica napus in response to low phosphorus stress

Zhang

Huang

et al. 2009

Plant Soil

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Genotypic differences in acquiring immobile P exist among species or cultivars within one species. We investigated the P-efficiency mechanisms of rapeseed (Brassica napus L.) in low P soil by measuring plant growth, P acquisition and rhizosphere properties. Two genotypes with different P efficiencies were grown in a root-compartment experiment under low P (P15: 15 mg P kg −1 ) and high P (P100: 100 mg P kg −1 ) treatments. The P-efficient genotype produced more biomass, and had a high seed yield and high P acquisition efficiency under low P treatment. Under both P treatments, both genotypes decreased inorganic P (Pi) and organic P (Po) fractions in the rhizosphere soil. However there was no decrease in NaHCO 3 -Po at P100. For the P15 treatment, the concentrations of NaHCO 3 -Po and NaOH-Po were negatively correlated with soil acid phosphatase activity. The P-efficient genotype 102 differed from the P-inefficient genotype 105 in the following ways. In the rhizosphere the soil pH was lower, acid phosphatase activity was higher, and depletion of P was greater. Further the depletion zones were wider. These results suggested that improving P efficiency based on the character of P efficiency acquisition in P-efficient genotype would be a potential approach for maintaining rapeseed yield potential in soils with low P bioavailability.

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Section: Depletion Of Soil Phosphorus Fractions In the Rhizospheresupporting

confidence: 92%

Section: Rhizosphere Phmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Genotypic differences in phosphorus acquisition and the rhizosphere properties of Brassica napus in response to low phosphorus stress

Zhang

Huang

et al. 2009

Plant Soil

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“…Such studies have used a range of different plants species and soil types whereby roots, root hairs and mycorrhizas are separated from bulk soil using meshed-compartments in rhizobox systems (e.g. Chen et al 2002;Gahoonia and Nielsen 1997;George et al 2002;Morel and Hinsinger 1999;Nuruzzaman et al 2006;Tarafdar and Jungk 1987). Such approaches are useful in identifying different processes that contribute to P depletion even if they may exaggerate rhizosphere effects.…”

Section: Depletion Of Phosphorus In the Rhizospherementioning

confidence: 99%

Acquisition of phosphorus and nitrogen in the rhizosphere and plant growth promotion by microorganisms

et al. 2009

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International audienceThe rhizosphere is a complex environment where roots interact with physical, chemical and biological properties of soil. Structural and functional characteristics of roots contribute to rhizosphere processes and both have significant influence on the capacity of roots to acquire nutrients. Roots also interact extensively with soil microorganisms which further impact on plant nutrition either directly, by influencing nutrient availability and uptake, or indirectly through plant (root) growth promotion. In this paper, features of the rhizosphere that are important for nutrient acquisition from soil are reviewed, with specific emphasis on the characteristics of roots that influence the availability and uptake of phosphorus and nitrogen. The interaction of roots with soil microorganisms, in particular with mycorrhizal fungi and non-symbiotic plant growth promoting rhizobacteria, is also considered in relation to nutrient availability and through the mechanisms that are associated with plant growth promotion

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Crop Root Systems and Nutrient Uptake from Soils

Gregory

2011

The Molecular and Physiological Basis of Nutrient Use Efficiency in Crops

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Untitled

Cited by 62 publications

References 33 publications

Genotypic differences in phosphorus acquisition and the rhizosphere properties of Brassica napus in response to low phosphorus stress

Genotypic differences in phosphorus acquisition and the rhizosphere properties of Brassica napus in response to low phosphorus stress

Acquisition of phosphorus and nitrogen in the rhizosphere and plant growth promotion by microorganisms

Crop Root Systems and Nutrient Uptake from Soils

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