1. Uptake of Aluminium by the root tips of an Al-sensitive and Al-tolerant cultivar of Zea mays
- Author
-
Paul Fallavier, J. C. Pintro, and Jean Barloy
- Subjects
Nutrient solution ,Physiology ,chemistry.chemical_element ,Plant Science ,Biology ,Zea mays ,Résistance aux facteurs nuisibles ,Aluminium ,Genetics ,Poaceae ,Variété ,Cultivar ,Absorption de substances nutritives ,Toxicité du sol ,fungi ,P35 - Fertilité du sol ,food and beverages ,Low ionic strength ,Taux de croissance ,F61 - Physiologie végétale - Nutrition ,chemistry ,Agronomy ,Expérimentation en laboratoire ,H50 - Troubles divers des plantes ,Phytotoxicity ,Elongation ,Racine - Abstract
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 μM) and low Al 3+ activity (10.3 μM). 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.
- Published
- 1998