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- Title
Involvement of multiple aluminium exclusion mechanisms in aluminium tolerance in wheat
- Authors
Darrah, P. R.; Jones, D. L.; Grunes, D. L.; Kochian, L. V.; Papernik, L. A.; Pellet, D. M.
- Abstract
The goal of this study was to determine if Al-chelators other than malate are released from root apices and are involved in Al-tolerancein different wheat (Triticum aestivum L.) genotypes. Also we wantedto establish if root exudates contribute to increases in rhizospherepH around the root tip. In seedlings of Al-tolerant Atlas, we have documented a constitutive phosphate exudation from the root apex. Because phosphate 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. This study suggests that in wheat, Al-tolerance can be mediated by multiple exclusion mechanisms controlled by different genes.
- Subjects
ALUMINUM; PLANTS
- Publication
Plant & Soil, 1997, Vol 192, Issue 1, p63
- ISSN
0032-079X
- Publication type
Article
- DOI
10.1023/a:1004256121772