Aluminium-Sensitive Arabidopsis Thaliana Mutants Als3 and Als5 Differ in Response to Acidic Stress
Plants sensitive to Al3+ may also be sensitive to acidity. We exposed two Arabidopsis Al3+-sensitive mutants (als3 and als5) and wild type (WT) to different pH (5. 5 or 4. 2) with or without 0. 5 mM homo PIPES buffer. Homo PIPES kept pH at starting 4. 2 or 5.5 for 24 h. Acidity decreased als3 and WT shoot biomass, whereas als5 showed acid resistance. Acidity reduced accumulation of Ca2+ and Mg2+ but not K+ in all genotypes. Under acidic stress als5 had higher shoot Ca2+ and Mg concentrations than WT, which might be responsible for als5 acid resistance.
Jayakumar Bose Olga Babourina Zed Rengel
University of Western Australia, 35 Stirling Highway, Crawley WA 6009, Australia
国际会议
The 7th International Symposium on Plant-Soil Interactions at Low pH(第七届低pH条件下植物-土壤交互作用国际研讨会)
广州
英文
97-98
2009-05-17（万方平台首次上网日期，不代表论文的发表时间）