Thornton F. C., Schaedle M., Raynal D. J.
College of Environmental and Forest Biology, State University of New York, Syracuse, NY 13210, USA.
Tree Physiol. 1986 Dec;2(1_2_3):307-316. doi: 10.1093/treephys/2.1-2-3.307.
Hydroponic experiments were conducted to determine the effects of aluminum (Al) on root development, shoot morphology and the nutrient composition of honeylocust seedlings (Gleditsia triacanthos L.). Seedlings were grown at pH 4 in a nutrient solution containing 0, 50, 150, 600 or 1500 microM Al. Within seven days, there were significant differences in root growth and root nutrient composition between control seedlings and seedlings grown in the presence of 150 or 600 microM Al. By day 14, significant reductions in leaf production and plant height were observed in seedlings treated with 1500 microM Al. At the lowest Al concentration, 50 microM, leaf size and expansion rates were significantly lower than in the controls. By the third week of the experiment, Ca and Mg concentrations in young leaves of the Al-treated seedlings were significantly lower than in leaves of control plants. Analysis of old leaf tissue, however, revealed no consistent pattern of nutrient concentration with Al treatment.
进行水培实验以确定铝（Al）对刺槐幼苗（皂荚）根系发育、地上部形态和养分组成的影响。将幼苗种植在pH值为4的营养液中，该营养液含有0、50、150、600或1500微摩尔的铝。在七天内，对照幼苗与在150或600微摩尔铝存在下生长的幼苗之间，根系生长和根系养分组成存在显著差异。到第14天，用1500微摩尔铝处理的幼苗叶片产量和株高显著降低。在最低铝浓度50微摩尔时，叶片大小和扩展速率显著低于对照。到实验的第三周，经铝处理的幼苗幼叶中的钙和镁浓度显著低于对照植物的叶片。然而，对老叶组织的分析表明，铝处理对养分浓度没有一致的影响模式。
