Organic acids alleviate iron chlorosis in chickpea grown on two p-fertilized soils
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...
| Autores: | ; ; ; |
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| Tipo de documento: | Artigo |
| Estado: | Published version |
| Data de publicação: | 2014 |
| País: | Chile |
| Recursos: | Agencia Nacional de Investigación y Desarrollo |
| Repositório: | SciELO Chile |
| Idioma: | Inglês |
| OAI Identifier: | oai:scielo:S0718-95162014000200004 |
| Acesso em linha: | http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162014000200004 |
| Nível de acesso: | Acesso aberto |
| Palavra-chave: | Calcareous soils iron oxides citrate malate oxalate phosphate fertilization |
| Resumo: | 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. |
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