Influx and efflux of organic acids across the soil-root interface of Zea mays L. and its implications in rhizosphere C flow
Rent the article at a discountRent now
* Final gross prices may vary according to local VAT.Get Access
The influx and efflux of organic acids across the root-soil interface were investigated in intact, sterile maize (Zea mays L.) roots under a variety of experimental conditions. Under nutrient-sufficient conditions the efflux of organic acids was shown to constitute < 1% of the total C lost across the root-soil interface. Under severe nutrient stress, however, the rates of malate and citrate efflux from the root increased 33 and 12 fold respectively. Influx experiments indicated that roots could not directly reabsorb citrate-Fe3+ or other metal complexes from solution. Influx of citrate was observed only at high external citrate concentration (≥ 1 mM) or from solutions with low ionic strengths. It was postulated that citrate influx is of little importance in a soil environment.
- Dalal, R C 1979 Simple procedure for the determination of total carbon and its radioactivity in soils and plant material. Analysis 104, 151–154.
- 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.
- Griffin, G J, Hale, M G and Shay, F J 1976 Nature and quantity of sloughed organic matter produced by roots of axenic plants. Soil Biol. Biochem. 8, 29–32.
- Ganmore-Neumann, R, Bar-Yosef, B, Shanzer, A and Libman, J 1992 Enhanced iron (Fe) uptake by synthetic siderophores in corn roots. J. Plant Nutr. 15, 1027–1037.
- Hoagland, D R and Arnon, D I 1950 The water culture method for growing plants without soil. Circ. 347. Calif Agric. Exp. Stn. Berkeley, CA.
- 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 and Soil 113, 161–165.
- Horst, W J, Wagner, A and Marschner, H 1982 Mucilage protects roots meristems from aluminium injury. Z. Pflanzenphysiol. 105, 435–444.
- Jones, D L and Darrah, P R 1992 Re-sorption of organic compounds by roots of Zea mays L. and its consequences in the rhizosphere I. Re-sorption of 14C labelled glucose, mannose and citric acid. Plant and Soil 143, 259–266.
- Jones, D L and Darrah, P R 1993 Influx and efflux of amino acids from Zea mays L. roots and their implications for N nutrition and the rhizosphere. Plant and Soil 155/156, 87–90.
- Jones, D L and Darrah, P R 1994 Amino acid infux and efflux at the soil-root interface of Zea mays L. and its implications in the rhizosphere. Plant and Soil 163, 1–12.
- Kraffczyk, I, Trolldeiner, G and Beringer, H 1984 Soluble root exudates of maize: Influence of potassium supply and rhizosphere microorganisms. Soil Biol. Biochem. 16, 315–322.
- Lambers, H 1987 Growth, respiration, exudation and symbiotic associations: The fate of carbon translocated to the roots. In Root Development and Function. Eds. P JGregory, J VLake and D ARose. pp 125–145. Soc. Exp. Biol. Seminar Ser. 30. Cambridge University Press, Cambridge.
- Nobel, P S 1991 Physicochemical and Environmental Plant Physiology. Academic Press Inc., New York. 635 p.
- Osmond, C B 1976 Ion absorption and carbon metabolism in cells of higher plants. In Encyclopedia of Plant Physiology. New Series, Vol. 2 Part A. Eds. ULüttge and M GPitman. pp 347–372. Springer-Verlag, Berlin.
- Parker, D R, Chaney, R L and Norvell, W A 1993 GEOCHEM-PC: A chemical speciation program for IBM and compatible computers. In Chemical Equilibria and Reaction Models. Ed. R HLoeppert. Soil Science Society of America, Madison, WI.
- Spiro, T G, Bates, G and Saltman 1967 The hydrolytic polymerization of ferric citrate. II Influence of excess citrate. J. Am. Chem. Soc. 89, 5559–5562.
- Sturgeon, R J 1990 Monosaccharides. In Methods of Plant Biochemistry, Volume 2, Carbohydrates. Ed. P MDey. p 25. Academic Press, London.
- Takagi, S, Kamei, S and Yu, M 1988 Efficiency of iron extraction from soil by mugineic acid family phytosiderophores. J. Plant Nutr. 11, 643–651.
- Uren, N C and Reisenauer, H M 1988 The role of root exudates in nutrient acquisition. Adv. Plant Nutr. 3, 79–114.
- VonWiren, N, Römheld, V and Marschner, H 1993 Evaluation of strategy I mechanisms in iron efficient and inefficient maize cultivars. Plant and Soil 155/156, 445–448.
- Welch, R M, Norvell, W A, Schaefer, S C, Shaff, J E and Kochian, L V 1993 Induction of iron(III) and copper(II) reduction in pea (Pisum sativum L.) roots by Fe and Cu status: Does the root-cell plasmalemma Fe(III)-chelate reductase perform a general role in regulating cation uptake. Planta 190, 555–561.
- White, P S Smith, J A C 1989 Proton and anion transport at the tonoplast in crassulacean acid metabolism plants: Specificity of the malate-influx system in Kalanchoë daigremontiana. Planta 179, 265–274.
- Influx and efflux of organic acids across the soil-root interface of Zea mays L. and its implications in rhizosphere C flow
Plant and Soil
Volume 173, Issue 1 , pp 103-109
- Cover Date
- Print ISSN
- Online ISSN
- Kluwer Academic Publishers
- Additional Links
- organic acids
- Industry Sectors