using transmission
electron microscope and spectrophotometer to study the physiology and cell ultra structure changes of
two soybean cultivars of distinctly different sensitivities to Al toxicity, Zhechun 2 (Z.2,Al-resistant) and
Zhechun 3 (Z.3, Al-sensitive) after Al treatments. Using these two cultivars, we conducted a 14-day
nutrient solution experiment with Al concentrations set at 0, 10, 30, 60 and 90 mg L1