Abstract
Soluble root exudates were collected from three plants (Nicotiana tabacum L., Nicotiana rustica L. and Zea mays L.), grown under axenic and hydroponic conditions, in order to study their metal-solubilizing ability for Cd and other cations (Cu, Fe, Mn, Ni, Zn). Nicotiana spp. and Zea mays L. root exudates differed markedly in C/N ratio, sugars vs. amino acids ratio and organic acids content. Metals from two soils were extracted with either root exudate solutions, containing equal amounts of organic carbon, or distilled water as control. In the presence or absence of root exudates, the solubility of Fe and Mn was much higher than of the four other metals tested. Root exudates increased the solubilities of Mn and Cu, whereas those of Ni and Zn were not affected. Root exudates of Nicotiana spp. enhanced the solubility of Cd. The extent of Cd extraction by root exudates (N. tabacum L. N. rustica L. Zea mays L.) was similar to the order of Cd bioavailability to these three plants when grown on soil. An increase in Cd solubility in the rhizosphere of apical root zones due to root exudates is likely to be an important cause of the relatively high Cd accumulation in Nicotiana spp.
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References
Awad F, Römheld V and Marschner H 1988 Mobilization of ferric iron from a calcareous soil by plant-borne chelators (phytosiderophores). J. Plant Nutr. 11, 701–713.
Bromfield S M 1958 The solution of gamma-MnO2 by substances released from soil and from the root or oats and vetch in relation to Mn availability. Plant and Soil 10, 147–160.
Charlanes M 1960 Différence de comportement de quelques variétés d'avoine (Avena sativa L.) en présence de manganèse soluble et insoluble. C. R. Acad. Sci., Paris 250, 3713–3715.
Curl E A and Truelove B 1986 The Rhizosphere. Springer-Verlag, Berlin.
Dommergues Y R and Krupa S V 1978 Interactions Between Non-Pathogenic Soil Microorganisms and Plants. Elsevier, Amsterdam, NL.
Godo G H and Reisenauer H M 1980 Plant effects on soil mangangese availability. Soil Sci. Soc. Am. J. 44, 993–995.
Hewitt E 1966 Sand and Water Culture Methods Used in the Study of Plant Nutrition, Commonwealth Agric. Bur., Farnham Royal Bucks, UK.
Jauregui M A and Reisenauer H M 1982 Dissolution of oxides of manganese and iron by root exudates components. Soil Sci. Soc. Am. J. 46, 314–317.
Jolley V D and Brown J C 1989 Iron efficient and inefficient oats. I. Differences in phytosiderophore release. J. Plant Nutr. 12, 423–435.
Kawaï S, Takagi S and Sato Y 1988 Mugineic acid-family phytosiderophores in root-secretions of barley, corn and sorghum varieties. J. Plant Nutr. 11, 633–642.
Linehan D J, Sinclair A H and Mitchell M C 1989 Seasonal changes in Cu, Mn, Zn and Co concentrations in soil in the root zone of barley (Hordeum vulgare L.), J. Soil Sci. 40, 103–115.
Marschner H, Römheld V, Horst W J and Martin P 1986 Root induced changes in the rhizosphere: Importance for the mineral nutrition of plants. Z. Pflanzenernähr. Bodenk. 149, 441–456.
Marschner H 1988 Mechanisms of manganese acquisition by roots from soils. In Manganese in Soils and Plants. Eds. R DGraham et al. pp 191–204. Kluwer Academic Publishers, Dordrecht, The Netherlands.
McGrath S P 1989 Crop yield and composition. In Soil Quality Assessment. Ed. F A MdeHaan. pp 1–35, Final report to the C.E.C., DG XII, Contrat EV4A/0008/NL, Agricultural Univ. Wageningen, The Netherlands.
Mench M, Morel J L and Guckert A 1985 Liaison du cadmium avec la fraction macromoléculaire soluble des exsudats racinaires de maïs (Zea mays L.). C.R. Acad. Sci. Paris 301, 379–382.
Mench M, Morel J L and Guckert A 1987 Metal binding properties of high molecular weight soluble exudates from maize (Zea mays L.) roots. Biol. Fertil. Soils 3, 165–169.
Mench M, Morel J L, Guckert A and Guillet B 1988 Metal binding with root exudates of low molecular weight. J. Soil Sci. 39, 521–527.
Mench M, Tancogne J, Gomez A and Juste C 1989a Cadmium biovailability to Nicotiana tabacum L., Nicotiana rustica L. and Zea mays L., grown in soil amended or not amended with cadmium nitrate. Biol. Fertil. Soils 8, 48–53.
Mench M, Gomez A and Juste C 1989b Transfert des métaux du sol au végétal: principaux mécanismes et facteurs impliqués. In Qualité et Conservation des Sols: Devenir des Polluants dans les Sols. pp 183–207. Recherche et Environment 34. Seer. Etat Envir. Paris.
Merckx R, Vanginkel J H, Sinnaeve J and Cremers A 1986 Plant-induced changes in the rhizosphere of maize and wheat. II. Complexation of cobalt, zinc and manganese in the rhizosphere of maize and wheat. Plant and Soil 96, 95–108.
Morel J L, Mench M and Guckert A 1986 Measurement of Pb2+, Cu2+, Cd2+ binding with mucilage exudates from maize (Zea mays L.) roots. Biol. Fertil. Soils 2, 29–34.
Morel J L, Mench M and Guckert A 1987 Dynamique des métaux lourds dans la rhizosphere: Rôle des exsudats racinaires. Rev. Ecol. Biol. Sol. 24, 485–492.
Nielsen N E 1976 The effect of plants on the copper concentration in the soil solution. Plant and Soil 45, 679–687.
Nomoto K, Mino Y, Ishida T, Roshioka H, Ota N, Inoue M, Takagi S and Takemoto T 1981 X-ray crystal structure of the copper(II) complex of mugineic acid, a naturally occurring metal chelator of graminaceous plants. J.C.S. Chem. Com. 338–339.
Römheld V and Marschner H 1990 Genotypical differences among graminaceous species in release of phytosiderophores and uptake of iron phytosiderophores. Plant and soil 123, 147–153.
Rovira A D, Bowen G D and Foster R C 1983 The significance of rhizosphere microflora and mycorrhizas in plant nutrition. In Inorganic Plant Nutrition. Eds. ALäuchli and R LBieleski. pp 61–93. Encyclopedia of Plant Physiology, New series, Vol. 15A. Springer-Verlag, Berlin.
Shields C and Burnet A 1960 Determination of sugars. Anal. Chem. 32, 885–888.
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.
Treeby M, Marschner H and Römheld V 1989 Mobilization of iron and other micronutrient cations from a calcareous soil by plant-borne, microbial and synthetic metal chelators. Plant and Soil (In press).
Uren N C 1981 Chemical reduction of an insoluble higher oxide of manganese by plant roots. J. Plant Nutr. 4, 65–71.
Uren N C and Reisenauer H M 1988 The role of root exudates in nutrient acquisition. Adv. Plant Nutr. 3, 79–114.
Zhang F, Römheld V and Marschner H 1989 Effect of zinc deficiency in wheat on the release of zinc and iron mobilizing root exudates. Z. Pflanzenernaehr. Bodenkd 152, 205–210.
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Mench, M., Martin, E. Mobilization of cadmium and other metals from two soils by root exudates of Zea mays L., Nicotiana tabacum L. and Nicotiana rustica L.. Plant Soil 132, 187–196 (1991). https://doi.org/10.1007/BF00010399
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DOI: https://doi.org/10.1007/BF00010399