Effects of low aluminum activity in nutrient solutions on the organic acide concentrations in maize plants

Pintro J., Barloy J., Fallavier Paul. 1997. Effects of low aluminum activity in nutrient solutions on the organic acide concentrations in maize plants. Journal of Plant Nutrition, 20 (4-5) : 601-611.

Autre titre : Effets d'une faible activité de l'aluminium dans les solutions nutritives sur les concentrations d'acides organiques des plants de maïs

Résumé : The effects of low aluminum (Al) activity in nutrient solution on the concentrations of organic acids in two cultivars of maize (#Zea mays# L.), HS7777 Al-sensitive and C525-M Al-tolerant, were studied. Aluminum stress increased total organic acid concentration in the roots and in the shoots for both cultivars. The relative increase of t-aconitic, citric, formic, malic, and quinic acids was higher in the roots than in the shoots for both cultivars. The concentrations of c-aconitic, isocitric, malonic, oxalic, and succinic organic acids were reduced by Al stress, principally for C525-M. There were no consistent differences in organic acid concentrations between the cultivars to discriminate Al tolerance. The Al tolerance for C525-M may be justified by lower Al concentrations in the root tips where cellular division takes place and/or by higher excretion of organic acids from roots to the rhizosphere for detoxification of Al by chelation.

Mots-clés Agrovoc : Zea mays, aluminium, stress osmotique, Activité catalytique, solution nutritive, acide organique

Classification Agris : F61 - Physiologie végétale - Nutrition

Auteurs et affiliations

• Pintro J.
• Barloy J.
• Fallavier Paul, CIRAD-GERDAT-URA (FRA)

Source : Cirad - Agritrop (https://agritrop.cirad.fr/389521/)

Métriques

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