Logo image
Back
Organic acids alleviate iron chlorosis in chickpea grown on two p-fertilized soils
Journal article   Open access

Organic acids alleviate iron chlorosis in chickpea grown on two p-fertilized soils

A.R Sánchez-Rodríguez, M. C del Campillo, J. Torrent and D.L Jones
Journal of soil science and plant nutrition, Vol.14(2), pp.292-303
2014
DOI: https://doi.org/10.4067/S0718-95162014005000024
url
https://scielo.conicyt.cl/pdf/jsspn/v14n2/aop2414.pdfView
Published (Version of Record) Open

Abstract

SOIL SCIENCE
The objectives of this paper are to investigate the response of chickpea growing on two iron (Fe) chlorosis-inducing calcareous soils, with different Fe availability, generously supplied with phosphate (P), and to evaluate the effectiveness of a mixture of organic acids (citric, oxalic and malic) to alleviate Fe chlorosis symptoms. Application of P (+P treatment) aggravated Fe deficiency irrespective of the soil. Phosphorus-induced Fe chlorosis was alleviated when organic acids were also applied to the soil (+P+OA treatment), which was reflected in increased leaf chlorophyll concentration and decreased root ferric reductase activity in the plants growing on both soils; the effect was stronger for plants grown on the soil with the lowest Fe-available content. However, Fe chlorosis was still more severe than in the control (-P treatment) plants. The need of -P treatment plants to explore soil in order to take up nutrients is reflected in their root architecture, reduced root diameter and increased length, surface and volume relative to +P and +P+OA roots. Organic acids alleviate Fe chlorosis in function of non crystalline Fe oxides content but inhibit the root response mechanisms as a consequence of increasing Fe concentration in the soil solution.

Details

Metrics

35 Record Views
Logo image