Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

    We have a manual that explains all the features 

Record number 343578
Title Calcium-(organo)aluminum-proton competition for adsorption to tomato root cell walls: Experimental data and exchange model calculations
Author(s) Riemsdijk, W.H. van; Keltjens, W.G.; Postma, J.W.M.
Source Environmental Science and Technology 39 (2005)14. - ISSN 0013-936X - p. 5247 - 5254.
DOI https://doi.org/10.1021/es048138v
Department(s) Soil Chemistry and Chemical Soil Quality
Sub-department of Soil Quality
WIMEK
Publication type Refereed Article in a scientific journal
Publication year 2005
Keyword(s) aluminum-toxicity - conformational transitions - calcium pectate - organic-acids - ion behavior - al-binding - growth - pectin - elongation - hypothesis
Abstract Aluminum interacts with negatively charged surfaces in plant roots, causing inhibition of growth and nutrient uptake in plants growing on acid soils. Pectins in the root cell wall form the major cation adsorption surface, with Ca2+ as the main adsorbing cation. Adsorption of Al3+ and Ca2+ to isolated cell wall material of tomato (Lycopersicon esculentum L.) roots was examined at pH 3.00-4.25 and in the presence of the aluminum chelators citrate and malate. Al3+ displaced Ca2+ from its pectic binding sites in the cell wall to a large extent but apparently also bound to non-Ca binding groups, displacing protons. Aluminum adsorption depended on the pH of the solution, with little Al adsorbing to the cell wall material at very low pH (
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