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GrainGenes Reference Report: TAG-91-510

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Reference	TAG-91-510
Title	Physiological aspects of aluminium tolerance associated with the long arm of chromosome 2D of the wheat (Triticum aestivum L.) genome
Journal	Theoretical and Applied Genetics
Year	1995
Volume	91
Pages	510-516
Author	Aniol A
Abstract	Aluminum (Al) uptake in roots of wheat near isogenic lines having differing tolerances to aluminiun toxicity was studied using roots and root segment immersed in a nutrient solution at a controlled pH and temperature At low Al concentrations a mechanisn preventing root tips from accumulating too much Al was observed in an Al-tolerant isoline and a 'BH1146' euploid This mechanism was more efficient when divalent cations of calcium or magnesium were present in the nutrient medium Al accumulation steadily in creased in root tips of the Al-sensitive wheat isoline during all 24 h of incubation, and the presence of divalent cations in the medium even increased Al concentration in root tissue However, at higher Al concentrations in the medium the mechanism preventing the root tips of Al-tolerant genotypes from accumulating too much Al was not observed and in effect Al concentration in root tips of both Al-tolerant and Al-sensitive isolines increased It is concluded that genetical factors are located on the long arm of chromosome 2D from the BH1146 euploid that control the mechanism preventing root apical meristems from accumulating too much Al at low Al concentrations in the medium However, there must be other genetical factors also located on this chromosome segment that control Al detoxication in root tips of Al-tolerant lines at higher external Al concentration
Keyword	[ Hide all but 1 of 13 ] aluminum calcium-ions chromosome gene-location growth inhibition ion-uptake lines magnesium metal-tolerance root root-tips triticum aestivum

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