摘要
研究了不同浓度Pb2+对盐藻生长的胁迫作用及外源10mmol/LCa2+、La3+对Pb2+胁迫的影响.Pb2+抑制盐藻的生长,其抑制程度与Pb2+浓度成正相关;外源Ca2+在初期可缓解Pb2+对盐藻生长的抑制作用,后期加重Pb2+对盐藻生长的抑制;La3+处理加重Pb2+对盐藻生长的胁迫作用.实验结果初步表明外源Ca2+内流参与盐藻对Pb2+胁迫的适应性调节作用.
The effects of lead stress at various concentration of （12 μg/L, 50μg/L,0. 1 mg/L, 0. 5 mg/L, 1.0 mg/L） on growth of Dunaliela salina , and the roles of Ca^2＋ and La^3＋ under lead stress were investigated, respectively. The results show that growth of Dunaliela salina was inhibited by lead with varieties concentration, and there was a positive correlation between inhibitory effect and lead concentration （from 12 μg/L to 1.0 mg/L）, while participation of extracellular Ca^2＋（10 mmol/L）, inhibitory effect of lead to growth of Dunaliela salina was weakened at preliminary stage, but strengthened at late stage, sep- arately, other than Ca^2＋, due to participation of La^3＋ （10 mmol/L）, the inhibitory effect of lead was throughout intensified at various concentration. In conclusion, the results indicate that extracellular calcium played an important adjusting role under lead stress to Dunaliela salina.
出处
《武汉大学学报（理学版）》
CAS
CSCD
北大核心
2005年第4期506-510,共5页
Journal of Wuhan University:Natural Science Edition
