INVOLVEMENT OF MULTIPLE ALUMINUM EXCLUSION MECHANISMS IN ALUMINUM TOLERANCE IN WHEAT

Citation
Dm. Pellet et al., INVOLVEMENT OF MULTIPLE ALUMINUM EXCLUSION MECHANISMS IN ALUMINUM TOLERANCE IN WHEAT, Plant and soil, 192(1), 1997, pp. 63-68
Citations number
22
Categorie Soggetti
Agriculture Soil Science","Plant Sciences",Agriculture
Journal title
ISSN journal
0032079X
Volume
192
Issue
1
Year of publication
1997
Pages
63 - 68
Database
ISI
SICI code
0032-079X(1997)192:1<63:IOMAEM>2.0.ZU;2-X
Abstract
The goal of this study was to determine if AI-chelators other than mal ate are released from root apices and are involved in Al-tolerance in different wheat (Triticum aestivum L.) genotypes. Also we wanted to es tablish if root exudates contribute to increases in rhizosphere pH aro und the root tip. In seedlings of Al-tolerant Atlas, we have documente d a constitutive phosphate exudation from the root apex. Because phosp hate can complex Al and bind protons, it could play an important role in Al tolerance, both via complexation of Al3+ and by contributing to the alkalinization of rhizosphere pH observed at the apex of Atlas. Th is study suggests that in wheat, Al-tolerance can be mediated by multi ple exclusion mechanisms controlled by different genes.