Uptake of aluminium by the root tips of an Al-sensitive and Al-tolerant cultivar of Zea mays

Pintro J., Barloy J., Fallavier Paul. 1998. Uptake of aluminium by the root tips of an Al-sensitive and Al-tolerant cultivar of Zea mays. Plant Physiology and Biochemistry, 36 (6) : 463-467.

Autre titre : Absorption d'aluminium par les extrémités racinaires de cultivars de Zea mays sensible et tolérant à l'aluminium

Résumé : Uptake and compartmentation of Al in the roots tips were investigated in two corn (Zea mays L.) cultivars (HS7777 single sensitive hybrid and C525-M single tolerant hybrid). Seedlings were grown for 24 h in nutrient solution at pH 4.4 characterized by low ionic strength (2,06 microM) and low Al3+ activity (10.3 microM). The root elongation decreased strongly for the sensitive cultivar. There were no differences in the contents of total Al in the entire roots between cultivars. Nonexchangeable-Al and exchangeable-Al contents were higher in the root tips of HS7777. The sensitive cultivar also showed higher total and exchangeable-Al contents in excised root tips in 180 min of Al uptake. Al uptake for both cultivars increased in solution containing 0.1 mM of 2,4-dinitrophenol. Al contents were higher for the tolerant cultivar.

Mots-clés Agrovoc : Zea mays, variété, aluminium, toxicité du sol, absorption de substances nutritives, racine, résistance aux facteurs nuisibles, taux de croissance, expérimentation en laboratoire

Classification Agris : F61 - Physiologie végétale - Nutrition
H50 - Troubles divers des plantes
P35 - Fertilité du sol

Auteurs et affiliations

• Pintro J.
• Barloy J.
• Fallavier Paul, CIRAD-AMIS-AGRONOMIE (FRA)

Source : Cirad - Agritrop (https://agritrop.cirad.fr/390790/)

Métriques

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