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Origins of root-mediated pH changes in the rhizosphere and their responses to environmental constraints: A review

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Abstract

The aim of the present review is to define the various origins of root-mediated changes of pH in the rhizosphere, i.e., the volume of soil around roots that is influenced by root activities. Root-mediated pH changes are of major relevance in an ecological perspective as soil pH is a critical parameter that influences the bioavailability of many nutrients and toxic elements and the physiology of the roots and rhizosphere microorganisms. A major process that contributes root-induced pH changes in the rhizosphere is the release of charges carried by H+ or OH− to compensate for an unbalanced cation–anion uptake at the soil–root interface. In addition to the ions taken up by the plant, all the ions crossing the plasma membrane of root cells (e.g., organic anions exuded by plant roots) should be taken into account, since they all need to be balanced by an exchange of charges, i.e., by a release of either H+ or OH−. Although poorly documented, root exudation and respiration can contribute some proportion of rhizosphere pH decrease as a result of a build-up of the CO2 concentration. This will form carbonic acid in the rhizosphere that may dissociate in neutral to alkaline soils, and result in some pH decrease. Ultimately, plant roots and associated microorganisms can also alter rhizosphere pH via redox-coupled reactions. These various processes involved in root-mediated pH changes in the rhizosphere also depend on environmental constraints, especially nutritional constraints to which plants can respond. This is briefly addressed, with a special emphasis on the response of plant roots to deficiencies of P and Fe and to Al toxicity. Finally, soil pH itself and pH buffering capacity also have a dramatic influence on root-mediated pH changes.

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References

  • Ahmad A R and Nye P H 1990 Coupled diffusion and oxidation of ferrous iron in soils. I. Kinetics of oxygenation of ferrous iron in soil suspension. J. Soil Sci. 41, 395–409.

    Google Scholar 

  • Ando T, Yoshida S and Nishiyama I 1983 Nature of oxidizing power of rice roots. Plant Soil 72, 57–71.

    Google Scholar 

  • Anoua M, Jaillard B, Ruiz T, Bénet J C 1997 Couplages entre transferts de matiére et réactions chimiques dans un sol. II. Application au transfert de matiére dans la rhizosphére. Entropie 207, 13–24.

    Google Scholar 

  • Armstrong W 1967 The use of polarography in the assay of oxygen diffusing from roots in anaerobic media. Physiol. Plant. 20, 540–553.

    Google Scholar 

  • Asady G H and Smucker A J M 1989 Compaction and root modifications of soil aeration. Soil Sci. Soc. Am. J. 53, 251–254.

    Google Scholar 

  • Bakker M R, Dieffenbach A and Ranger J 1999 Soil solution chemistry in the rhizosphere of roots of sessile oak (Quercus petraea) as influenced by lime. Plant Soil 209, 209–216.

    Google Scholar 

  • Begg C B M, Kirk G J D, MacKenzie A F and Neue H-U 1994 Root-induced iron oxidation and pH changes in the lowland rice rhizosphere. New Phytol. 128, 469–477.

    Google Scholar 

  • Bertrand I, Hinsinger P, Jaillard B and Arvieu J C 1999 Dynamics of phosphorus in the rhizosphere of maize and rape grown on synthetic, phosphated calcite and goethite. Plant Soil 211, 111–119.

    Google Scholar 

  • Bienfait H F, Bino R J, van der Bliek A M, Duivenvoorden J F and Fontaine J M 1983 Characterization of ferric reducing activity in roots of Fe-deficient Phaseolus vulgaris. Physiol. Plant. 59, 196–202.

    Google Scholar 

  • Bidel L P R, Renault P, Pages L and Riviere L M 2000 Mapping meristem respiration of Prunus persica (L.) Batsch seedlings: potential respiration of the meristems, O2 diffusional constraints and combined effects on root growth. J. Exp. Bot. 51, 755–768.

    PubMed  Google Scholar 

  • Brown JC 1978 Mechanism of iron uptake by plants. Plant Cell Environ. 1, 249–257.

    Google Scholar 

  • Calba H and Jaillard B 1997 Effect of aluminium on ion uptake and H+ release by maize. New Phytol. 137, 607–616.

    Google Scholar 

  • Calba H, Cazevieille P and Jaillard B 1999 Modelling of the dynamics of Al and protons in the rhizosphere of maize cultivated in acid substrate. Plant Soil 209, 57–69.

    Google Scholar 

  • Chaignon V, Bedin F and Hinsinger P 2002 Copper bioavailability and rhizosphere pH changes as affected by nitrogen supply for tomato and oilseed rape cropped on an acidic and a calcareous soil. Plant Soil 243, 219–228

    Google Scholar 

  • Chen C C, Dixon J B and Turner F T 1980 Iron coatings on rice roots: mineralogy and quantity influencing factors. Soil Sci. Soc. Am. J. 44, 635–639.

    Google Scholar 

  • Dakora F D and Phillips D A 2002 Root exudates as mediators of mineral acquisition in low-nutrient environments. Plant Soil 245, 35–47.

    Google Scholar 

  • Darrah P R 1993 The rhizosphere and plant nutrition: a quantitative approach. Plant Soil 155/156, 1–20.

    Google Scholar 

  • Degenhardt J, Larsen P B, Howell S H and Kochian L V 1998 Aluminum resistance in the Arabidopsis mutant alr-104 is caused by an aluminum-induced increase in rhizosphere pH. Plant Physiol. 117, 19–27.

    PubMed  Google Scholar 

  • Dehérain P P 1902 Traité de Chimie Agricole. Masson, Paris, 969 pp.

  • Delhaize E, Ryan P R and Randall P J 1993 Aluminium tolerance in wheat (Triticum aestivum L.): II. Aluminium-stimulated excretion of malic acid from root apices. Plant Physiol. 103, 695–702.

    PubMed  Google Scholar 

  • Dinkelaker B, Römheld V and Marschner H 1989 Citric acid excretion and precipitation of calcium citrate in the rhizosphere of white lupin (Lupinus albus L.). Plant Cell Environ. 12, 285–292.

    Google Scholar 

  • Dinkelaker B, Hahn G and Marschner H 1993 Non-destructive methods for demonstrating chemical changes in the rhizosphere. II. Application of methods. Plant Soil 155/156, 73–76.

    Google Scholar 

  • Dinkelaker B, Hengeler C and Marschner H 1995 Distribution and function of proteoid roots and other root clusters. Bot. Acta 108, 183–200.

    Google Scholar 

  • Durand R and Bellon N 1993 Comparaison d'une méthode de diffusion et d'une méthode géochimique pour estimer la production racinaire de CO2. Sci. Sol 31, 93–107.

    Google Scholar 

  • Durand R, Bellon N and Jaillard B 2001 Determining the net flux of charge released by maize roots by directly measuring variations of the alkalinity in the nutrient solution. Plant Soil 229, 305–318.

    Google Scholar 

  • Fischer W R, Flessa H and Schaller G 1989 pH values and redox potentials in microsites of the rhizosphere Z. Pflanzenernaehr. Bodenkd. 152, 191–195.

    Google Scholar 

  • Flessa H and Fischer W R 1992 Plant-induced changes in the redox potentials of rice rhizospheres. Plant Soil 143, 55–60.

    Google Scholar 

  • Foy C D 1988 Plant adaptation to acid, aluminium toxic soils. Commun. Soil Sci. Plant Anal. 19, 959–987.

    Google Scholar 

  • Gahoonia T S, Claassen N and Jungk A 1992 Mobilization of phosphate in different soils by ryegrass supplied with ammonium or nitrate. Plant Soil 140, 241–248.

    Google Scholar 

  • Gardner W K, Parberry D G and Barber D A 1982 The acquisition of phosphorus by Lupinus albus L. I. Some characteristics of the soil/root interface. Plant Soil 68, 19–32.

    Google Scholar 

  • Gardner W K, Barber D A and Parberry D G 1983 The acquisition of phosphorus by Lupinus albus L. III.The probable mechanism by which phosphorus movement in the soil/root interface is enhanced. Plant Soil 70, 107–124.

    Google Scholar 

  • Gerendás J and Schurr U 1999 Physicochemical aspects of ion relations and pH regulation in plants — a quantitative approach. J. Exp. Bot. 50, 1101–1114.

    Google Scholar 

  • Gollany H T, Schumacher T E, Rue R R and Liu S-Y 1993 A carbon dioxide microelectrode for in situ pCO2 measurement. Microchem. J. 48, 42–49.

    Google Scholar 

  • Göttlein A, Heim A and Matzner E 1999 Mobilization of aluminium in the rhizosphere soil solution of growing tree roots in an acidic soil. Plant Soil 211, 41–49.

    Google Scholar 

  • Gras F 1974 Une méthode expérimentale pour la détermination du pH et de la solubilité du carbonate de calcium en sols calcaires. Bull. Assoc. Fr. Etude Sol 1, 33–48.

    Google Scholar 

  • Green M S and Etherington J R 1977 Oxidation of ferrous iron by rice (Oryza sativa L.) roots: a mechanism for waterlogging tolerance? J. Exp. Bot. 28, 678–690.

    Google Scholar 

  • Gregory P J and Hinsinger P 1999 New approaches to studying chemical and physical changes in the rhizosphere: an overview. Plant Soil 211, 1–9.

    Google Scholar 

  • Grierson P F 1992 Organic acids in the rhizosphere of Banksia integrifolia L. f. Plant Soil 144, 259–265.

    Google Scholar 

  • Grierson P F and Attiwill P M 1989 Chemical characteristics of the proteoid root mat of Banksia integrifolia L. Austr. J. Bot. 37, 137–143.

    Google Scholar 

  • Grinsted M J, Hedley M J, White R E and Nye P H 1982 Plantinduced changes in the rhizosphere of rape (Brassica napus var. Emerald). I. pH changes and the increase in P concentration in the soil solution. New Phytol. 91, 19–29.

    Google Scholar 

  • Guivarch A, Hinsinger P and Staunton S 1999 Root uptake and distribution of radiocaesium from contaminated soils and the enhancement of Cs adsorption in the rhizosphere. Plant Soil 211, 131–138.

    Google Scholar 

  • Häussling M, Leisen E, Marschner H and Römheld V 1985 An improved method for non-destructive measurements of the pH at the root–soil interface (rhizosphere). J. Plant Physiol. 117, 371–375.

    Google Scholar 

  • Haynes R J 1990 Active ion uptake and maintenance of cation– anion balance: A critical examination of their role in regulating rhizosphere pH. Plant Soil 126, 247–264.

    Google Scholar 

  • Hedley M J, Nye P H and White R E 1982 Plant-induced changes in the rhizosphere of rape (Brassica napus var. Emerald) seedlings. II. Origin of the pH change. New Phytol. 91, 31–44.

    Google Scholar 

  • Helal H M and Sauerbeck D 1989 Carbon turnover in the rhizosphere. Z. Pflanzenernaehr. Bodenkd. 152, 211–216.

    Google Scholar 

  • Hiatt A J 1967 Relationship of cell pH to organic acid change during ion uptake. Plant Physiol. 42, 294–298.

    Google Scholar 

  • Hiltner L 1904 Ñber neuere Ehrfahrungen und Problem auf dem Gebiet der Bodenbakteriologie unter besonderer Berücksichtigung der Grundüngung und Brache. Arb. Dtsch. Landwirt. Ges. 98, 59–78.

    Google Scholar 

  • Hinsinger P 1998 How do plant roots acquire mineral nutrients? Chemical processes involved in the rhizosphere. Adv. Agron. 64, 225–265.

    Google Scholar 

  • Hinsinger P 2001a Bioavailability of soil inorganic P in the rhizosphere as affected by root-induced chemical changes: a review. Plant Soil 237, 173–195.

    Google Scholar 

  • Hinsinger P 2001b Bioavailability of trace elements as related to root-induced chemical changes in the rhizosphere. In Trace Elements in the Rhizosphere. Eds G R Gobran, W W Wenzel and E Lombi. CRC Press LCC, Boca Raton, FL, pp. 25–41.

    Google Scholar 

  • Hinsinger P and Gilkes R J 1996 Mobilization of phosphate from phosphate rock and alumina-sorbed phosphate by the roots of ryegrass and clover as related to rhizosphere pH. Eur. J. Soil Sci. 47, 533–544.

    Google Scholar 

  • Hinsinger P and Gilkes R J 1997 Dissolution of phosphate rock in the rhizosphere of five plant species grown in an acid, P-fixing mineral substrate. Geoderma 75, 231–249.

    Google Scholar 

  • Hinsinger P, Fernandes Barros O N, Benedetti M F, Noack Y and Callot G 2001 Plant-induced weathering of a basaltic rock: experimental evidence. Geochim. Cosmochim. Acta 65, 137–152.

    Google Scholar 

  • Hoffland E, Findenegg G R and Nelemans J A 1989 Solubilization of rock phosphate by rape. II. Local root exudation of organic acids as a response to P-starvation. Plant Soil 113, 161–165.

    Google Scholar 

  • Imas P, Bar-Yosef B, Kafkafi U and Ganmore-Neumann R 1997a Release of carboxylic anions and protons by tomato roots in response to ammonium nitrate ratio and pH in nutrient solution. Plant Soil 191, 27–34.

    Google Scholar 

  • Imas P, Bar-Yosef B, Kafkafi U and Ganmore-Neumann R 1997b Phosphate induced carboxylate and proton release by tomato roots. Plant Soil 191, 35–39.

    Google Scholar 

  • Jaillard B and Hinsinger P 1993 Alimentation minérale des végétaux dans le sol. In Techniques Agricoles, n. 87 (6-93), fasc. 1210, pp. 1–13. Editions Techniques, Paris.

    Google Scholar 

  • Jaillard B, Plassard C and Hinsinger P 2002 Measurements of H+ fluxes and concentrations in the rhizosphere. In Handbook of Soil Acidity. Ed. Z Rengel. Marcel Dekker, New York (in press).

    Google Scholar 

  • Jarvis S C, Robson A D 1983. The effects of nitrogen nutrition of plants on the development of acidity in Western Australian soils. I. Effects with subterranean clover grown under leaching conditions. Aust. J. Agric. Res. 34, 341–353.

    Google Scholar 

  • Johnson J F, Allan D L and Vance C P 1994 Phosphorus stress induced proteoid roots show altered metabolism in Lupinus albus. Plant Physiol. 104, 657–665.

    PubMed  Google Scholar 

  • Johnson J F, Allan D L, Vance C P and Weiblen G 1996 Root carbon dioxide fixation by phosphorus-deficient Lupinus albus: Contribution to organic acid exudation by proteoid roots. Plant Physiol. 112, 19–30.

    PubMed  Google Scholar 

  • Jones D L 1998 Organic acids in the rhizosphere — A critical review. Plant Soil 205, 25–44.

    Google Scholar 

  • Jones D L and Brassington D S 1998 Sorption of organic acids in acid soils and its implications in the rhizosphere. Eur. J. Soil Sci. 49, 447–455.

    Google Scholar 

  • Jones D L and Darrah P R 1994a Amino-acid influx and efflux at the soil-root interface of Zea mays L. and its implications in the rhizosphere. Plant Soil 163, 1–12.

    Google Scholar 

  • Jones D L and Darrah P R 1994b Role of root derived organic acids in the mobilization of nutrients from the rhizosphere. Plant Soil 166, 247–257.

    Google Scholar 

  • Jones D L, Dennis P G, Owen A G and van Hees P A W 2002 Organic acid behaviour in soils — Misconceptions and knowledge gaps. Plant Soil 248, 31–41.

    Google Scholar 

  • Keerthisinghe G, Hocking J P, Ryan P R and Delhaize E 1998 Effect of phosphorus supply on the formation and function of proteoid roots of white lupin (Lupinus albus L.). Plant Cell Environ. 21, 467–478.

    Google Scholar 

  • Kirk G J D and Le Van Du 1997 Changes in rice root architecture, porosity, and oxygen and proton release under phosphorus deficiency. New Phytol. 135, 191–200.

    Google Scholar 

  • Kirkby E A and Mengel K 1967 Ionic balance in different tissues of the tomato plants in relation to nitrate, urea and ammonium nutrition. Plant Physiol. 42, 6–14.

    Google Scholar 

  • Knight W G, Allen M F, Jurinak J J and Dudley L M 1989 Elevated carbon dioxide and solution phosphorus in soil with vesiculararbuscular mycorrhizal western wheatgrass. Soil Sci. Soc. Am. J. 53, 1075–1082.

    Google Scholar 

  • Lambers H, Scheurwater I and Atkin O K 1996 Respiratory patterns in roots in relation to their functioning. In Plant Roots. The Hidden Half. 2nd ed. Eds Y Waisel, A Eshel and U Kafkafi. pp. 529–556. Marcel Dekker, New York.

    Google Scholar 

  • Le Bot J, Alloush G A, Kirkby E A and Sanders F E 1990 Mineral nutrition of chickpea plants supplied with NO3 or NH4-N. II. Ionic balance in relation to phosphorus stress. J. Plant Nutr. 13, 1591–1605.

    Google Scholar 

  • Lindsay WL 1979 Chemical Equilibria in Soils. JohnWiley & Sons, New York. 449 pp.

    Google Scholar 

  • Marschner H 1995 Mineral Nutrition of Higher Plants. 2nd ed. Academic Press, London. 889 pp.

    Google Scholar 

  • Marschner H and Römheld V 1983 In vivo measurement of rootinduced pH changes at the soil–root interface: effect of plant species and nitrogen source. Z. Pflanzenernaehr. Bodenkd. 111, 241–251.

    Google Scholar 

  • Marschner H and Römheld V 1994 Strategies of plants for acquisition of iron. Plant Soil 165, 261–274.

    Google Scholar 

  • Marschner H, Römheld V and Ossenberg-Neuhaus H 1982 Rapid method for measuring changes in pH and reducing processes along roots of intact plants. Z. Pflanzenphysiol. 105, 407–416.

    Google Scholar 

  • Marschner H, Römheld V, Horst W J and Martin P 1986 Rootinduced changes in the rhizosphere: importance for the mineral nutrition of plants. Z. Pflanzenernaehr. Bodenkd. 149, 441–456.

    Google Scholar 

  • McLaughlin M J, Smolders E and Merckx R 1998 Soil-root interface: Physicochemical processes. In Soil Chemistry and Ecosystem Health, Special Publication no 52. pp. 233–277. Soil Science Society of America, Madison, WI.

    Google Scholar 

  • McLay C D A, Barton L and Tang C 1997 Acidification potential of ten grain legume species grown in nutrient solution. Aust. J. Agric. Res. 48, 1025–1032.

    Google Scholar 

  • Meharg A A 1994 A critical review of labelling techniques used to quantify rhizosphere carbon-flow. Plant Soil 166, 55–62.

    Google Scholar 

  • Mengel K, Kirkby E A, Kosegarten H and Appel T 2001 Principles of Plant Nutrition, 5th Ed. Kluwer Academic Publishers, Dordrecht. 864 pp.

    Google Scholar 

  • Merckx R, van Ginkel J H, Sinnaeve J and Cremers A 1986 Plantinduced changes in the rhizosphere of maize and wheat. I. Production and turnover of root-derived material in the rhizosphere of maize and wheat. Plant Soil 96, 85–93.

    Google Scholar 

  • Moorby H, White R E and Nye P H 1988 The influence of phosphate nutrition on H ion efflux from the roots of young rape plants. Plant Soil 105, 247–256.

    Google Scholar 

  • Nietfeld H W F 2001 Modeling the dynamics of the rhizosphere chemistry in acid forest soils. In Trace Elements in the Rhizosphere. Eds G R Gobran, WW Wenzel and E Lombi. pp. 25–41. CRC Press LCC, Boca Raton, FL.

    Google Scholar 

  • Neumann G and Römheld V 1999 Root excretion of carboxylic acids and protons in phosphorus-deficient plants. Plant Soil 211, 121–130.

    Google Scholar 

  • Neumann G, Massonneau A, Martinoia E and Römheld V 1999 Physiological adaptations to phosphorus deficiency during proteoid root development in white lupin. Planta 208, 373–382.

    Google Scholar 

  • Neumann G, Massonneau A, Langlade N, Dinkelaker B, Hengeler C, Römheld V and Martinoia E 2000 Physiological aspects of cluster root function and development in phosphorus-deficient white lupin (Lupinus albus L.). Ann. Bot. 85, 909–919.

    Google Scholar 

  • Nguyen C, Todorovic C, Robin C, Christophe A and Guckert A 1999 Continuous monitoring of rhizosphere respiration after labelling of plant shoot with 14CO2. Plant Soil 212, 191–201.

    Google Scholar 

  • Norstadt F A and Porter L K 1984 Soil gases and temperatures: a beef cattle feedlot compared to alfalfa. Soil Sci. Soc. Am. J. 48, 783–789.

    Google Scholar 

  • Nye P H 1981 Changes of pH across the rhizosphere induced by roots. Plant Soil 61, 7–26.

    Google Scholar 

  • Nye P H 1986 Acid–base changes in the rhizosphere. Adv. Plant Nutr. 2, 129–153.

    Google Scholar 

  • Ohwaki Y and Sugahara P 1997 Active extrusion of protons and exudation of carboxylic acids in response to iron deficiency by roots of chickpea (Cicer arietinum L.). Plant Soil 189, 49–55.

    Google Scholar 

  • Parker D R and Pedler J F 1998 Probing the ‘malate hypothesis’ of differential aluminium tolerance in wheat by using rhizotoxic ions as proxies for Al. Planta 205, 389–396.

    Google Scholar 

  • Petersen W and Böttger M 1991 Contribution of organic acids to the acidification of the rhizosphere of maize seedlings. Plant Soil 132, 159–163.

    Google Scholar 

  • Plassard C, Meslem M, Souche G and Jaillard B 1999 Localization and quantification of net fluxes of H+ along roots of maize by combined use of videodensitometry of indicator dye and ion-selective microelectrodes. Plant Soil 211, 29–39.

    Google Scholar 

  • Raven J A 1986 Biochemical disposal of excess H+ in growing plants? New Phytol. 104, 175–206.

    Google Scholar 

  • Raven J A 1991 Terrestrial rhizophytes and H+ currents circulating over at least a millimetre: an obligate relationship? New Phytol 117, 177–185.

    Google Scholar 

  • Riley D and Barber S A 1969 Bicarbonate accumulation and pH changes at the soybean (Glycine max (L.) Merr.) root–soil interface. Soil Sci. Soc. Am. Proc. 33, 905–908.

    Google Scholar 

  • Riley D and Barber S A 1971 Effect of ammonium and nitrate fertilization on phosphorus uptake as related to root-induced pH changes at the root–soil interface. Soil Sci. Soc. Am. Proc. 35, 301–306.

    Google Scholar 

  • Roelofs R F R, Rengel Z, Cawthray G R, Dixon K W and Lambers H 2001 Exudation of carboxylates in Australian Proteaceae: Chemical composition. Plant Cell Environ. 24, 891–904.

    Google Scholar 

  • Römheld V 1986 pH-Veränderungen in der Rhizosphäre verschiedener Kulturpflanzenarten in Abhängigkeit vom Nährstoffangebot. Potash Rev. 55, 1–8.

    Google Scholar 

  • Römheld V and Kramer D 1983 Relationship between proton ef-flux and rhizodermal transfer cells induced by iron deficiency. Z. Pflanzenphysiol. 113, 73–83.

    Google Scholar 

  • Römheld V and Marschner H 1981 Iron deficiency stress induced morphological and physiological changes in root tips on sunflower. Physiol. Plant. 53, 354–360.

    Google Scholar 

  • Römheld V and Marschner H 1986 Mobilization of iron in the rhizosphere of different plant species. Adv. Plant Nutr. 2, 155–204.

    Google Scholar 

  • Römheld V, Müller Ch and Marschner H 1984 Localization and capacity of proton pumps in roots of intact sunflower plants. Plant Physiol. 76, 603–606.

    Google Scholar 

  • Ruiz L 1992 Mobilisation du Phosphore des Apatites dans la Rhizosphére. Rôle de l'Excrétion de Protons par les Racines. PhD Thesis, Montpellier II University, 125 pp.

  • Rufyikiri G, Dufey J E, Nootens D and Delvaux B 2001 Effect of aluminium on bananas (Musa spp.) cultivated in acid solutions. II. Water and nutrient uptake. Fruits 56, 5–16.

    Google Scholar 

  • Rufty T W, MacKown C T, Lazof D B, Carter T E 1995 Effects of aluminium on nitrate uptake and assimilation. Plant Cell Environ. 18, 1325–1331.

    Google Scholar 

  • Ryan P R, Delhaize E and Randall P J 1995 Characterisation of Alstimulated efflux of malate from the apices of Al-tolerant wheat roots. Planta 196, 103–110.

    Google Scholar 

  • Sas L, Rengel Z and Tang C 2001 Root morphology, excess cation uptake, and extrusion of proton and organic acid anions in Lupinus albus L. under phosphorus deficiency. Plant Sci. 160, 1191–1198.

    PubMed  Google Scholar 

  • Schaller G 1987 pH changes in the rhizosphere in relation to the pH-buffering of soils. Plant Soil 97, 444–449.

    Google Scholar 

  • Schubert S, Schubert E and Mengel K 1990 Effect of low pH of the root medium on proton release, growth, and nutrient uptake of field beans (Vicia faba). Plant Soil 124, 239–244.

    Google Scholar 

  • Shane M W, De Roock S, De Vos M, Cawthray G R and Lambers H 2002 Internal phosphorus concentration modifies the initiation, growth and functioning of cluster roots in Hakea prostrata. Plant Soil 248, 209–219.

    Google Scholar 

  • Sijmons P C, Briel W van den and Bienfait H F 1984 Cytosolic NADPH is the electron donor for extracellular FeIII reduction in iron-deficient bean roots. Plant Physiol. 75, 219–221.

    Google Scholar 

  • Skene K R, Kierans M, Sprent J I and Raven J A 1996 Structural aspects of cluster root development and their possible significance for nutrient acquisition in Grevillea robusta (Proteaceae). Ann. Bot. 77, 443–451.

    Google Scholar 

  • Sposito G 1989 The Chemistry of Soils. Oxford University Press, New York. 277 p.

    Google Scholar 

  • Tang C and Rengel Z 2002 Role of plant cation/anion uptake ratio in soil acidification. In Handbook of Soil Acidity. Ed. Z Rengel. Marcel Dekker, New York (in press).

    Google Scholar 

  • Tang C, McLay C D A and Barton L 1997 A comparison of proton excretion of twelve pasture legumes grown in nutrient solution. Aust. J. Exp. Agric. 37, 563–570.

    Google Scholar 

  • Tang C, Hinsinger P, Drevon J J and Jaillard B 2001a Phosphorus deficiency impairs early nodule functioning and enhances proton release in roots of Medicago truncatula L. Ann. Bot. 88, 131–138.

    Google Scholar 

  • Tang C, Hinsinger P, Jaillard B, Rengel Z and Drevon J J 2001b Effect of phosphorus deficiency on the growth, symbiotic N2 fixation and proton release by two bean (Phaseolus vulgaris) genotypes. Agronomie 21, 683–689.

    Google Scholar 

  • Trolldenier G 1987 Rhizosphere organisms — Potassium interactions with emphasis on methodology. In Methodology in Soil-K Research. Proceedings of the 20th Colloquium of the International Potash Institute (I.P.I.), Baden bei Wien, Austria. Ed. I.P.I. pp. 283–297. I.P.I., Bern.

    Google Scholar 

  • Trolldenier G 1988 Visualization of oxidizing power of rice roots and of possible participation of bacteria in iron deposition Z. Pflanzenernaehr. Bodenkd. 151, 117–121.

    Google Scholar 

  • Van Breemen N 1987 Effects of redox processes on soil acidity. Neth. J. Agric. Sci. 35, 271–279.

    Google Scholar 

  • Westhuizen M M van der and Cramer M D 1998 The influence of elevated rhizosphere dissolved inorganic carbon concentrations on respiratory O2 and CO2 flux in tomato plants. J. Exp. Bot. 49, 1977–1985.

    Google Scholar 

  • Weinberger P and Yee D 1984 The influence of nitrogen sources on root-mediated changes in substrate pH. Can. J. Bot. 62, 161–162.

    Google Scholar 

  • Yan F, Schubert S and Mengel K 1992 Effect of low root medium pH on net proton release, root respiration, and root growth of corn (Zea mays L.) and broad bean (Vicia faba L.). Plant Physiol. 99, 415–421.

    Google Scholar 

  • Yan F, Schubert S and Mengel K 1996 Soil pH increase due to biological decarboxylation of organic anions. Soil Biol. Biochem. 28, 17–24.

    Google Scholar 

  • Youssef R A and Chino M 1989 Root-induced changes in the rhizosphere of plants. I. pH changes in relation to the bulk soil. Soil Sci. Plant Nutr. 35, 461–468.

    Google Scholar 

  • Yu Q, Tang C and Kuo J 2000 A critical review on methods to measure apoplastic pH in plants. Plant Soil 219, 29–40.

    Google Scholar 

  • Yu Q, Tang C and Kuo J 2001 Apoplastic pH change in roots of Lupinus angustifolius L. in response to pH>6. In Plant Nutrition: Food Security and Sustainability of Agro-ecosystems through Basic and Applied Research. Eds. W J Horst et al. pp. 242–243. Kluwer Academic Publishers, Dordrecht.

    Google Scholar 

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  1. INRA UMR Sol & Environnement, Place Pierre Viala, 34060, Montpellier Cedex 1, France

    Philippe Hinsinger, Claude Plassard & Benoît Jaillard

  2. Soil Science and Plant Nutrition, University of Western Australia, 35 Stirling Hwy, Crawley, WA, 6009, Australia

    Caixian Tang

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Hinsinger, P., Plassard, C., Tang, C. et al. Origins of root-mediated pH changes in the rhizosphere and their responses to environmental constraints: A review. Plant and Soil 248, 43–59 (2003). https://doi.org/10.1023/A:1022371130939

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  • DOI: https://doi.org/10.1023/A:1022371130939

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