Involvement of multiple aluminium exclusion mechanisms in aluminium tolerance in wheat

D. M. Pellet, L. A. Papernik, D. L. Jones, P. R. Darrah, D. L. Grunes, L. V. Kochian

Research output: Contribution to journalArticle

47 Citations (Scopus)

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-tolerance in different wheat (Triticum aestivum L.) genotypes. Also we wanted to establish if root exudates contribute to increases in rhizosphere pH 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.

Original languageEnglish
Pages (from-to)63-68
Number of pages6
JournalPlant and Soil
Volume192
Issue number1
DOIs
Publication statusPublished - 1 Jan 1997
Externally publishedYes

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