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以板蓝根为材料,研究了Pb2+胁迫下Ca2+对板蓝根幼苗POD、SOD活性、根系活力及蛋白质含量的影响。结果表明:在Pb2+处理下,板蓝根幼苗POD、SOD活性及蛋白质含量随Pb2+浓度升高呈先上升后下降的趋势,根系活力显著下降;在Ca2+处理下,浓度为80、160mg/L时,板蓝根幼苗POD、SOD活性、根系活力及蛋白质含量显著升高,浓度为320mg/L时,则显著低于对照,有明显抑制作用;Ca2+、Pb2+混合处理,80、160mg/LCa2+显著提高了Pb2+胁迫下POD、SOD活性、根系活力及蛋白质含量,具有缓解Pb2+毒害的作用,Ca2+为320mg/L时,与Pb2+起协同胁迫作用,增强对板蓝根幼苗的毒害效应。
The effects of Ca2 + on the activities of POD and SOD, the activity of root system and the protein content of Radix isatidis seedlings under Pb2 + stress were studied. The results showed that under Pb2 + treatment, the activities of POD and SOD and the content of protein in the roots of Radix isatidis increased firstly and then decreased with the increase of Pb2 + concentration, and the activity of root decreased significantly. Under the Ca2 + treatment, when the concentration was 80 and 160mg / L, , SOD activity, root activity and protein content were significantly increased. When the concentration was 320mg / L, the content of POD was significantly lower than that of the control, which was significantly inhibited. Ca2 + and Pb2 + mixed treatment, 80,160mg / LCa2 + SOD activity, root activity and protein content, with the role of alleviating Pb2 + toxicity. When Ca2 + was 320mg / L, Pb2 + could co-act synergistically to enhance the toxic effect on the seedlings of Radix Isatidis.