4种微量金属元素对绿色巴夫藻生长、叶绿素a及大小的影响

Effect of Four Kinds of Trace Metal Element on Growth, Chlorophyll-a and Size of Pavlova viridis

把 4种微量金属离子以不同的浓度添加到绿色巴夫藻的培养液中 ,结果表明 :Hg2 +和Pb2 +浓度分别在 5μg/L和 2 0 0 μg/L时 ,对绿色巴夫藻的生长有较好的促进作用 ,同时也使叶绿素a的含量提高 ;Hg2 +≥ 2 0 μg/L时 ,绿色巴夫藻的生长受到抑制 ,叶绿素a的含量降低。Pb2 +所有的试验浓度都使绿色巴夫藻生长加快 ,叶绿素a的含量提高 ;Co2 +在 1μg/L时对绿色巴夫藻的生长有最好的促进效果 ,但当Co2 +≥ 5μg/L时 ,开始对生长出现抑制作用 ,而Co2 +所有的试验浓度都使叶绿素a的含量降低 ;Mn2 +浓度在 10 0 μg/L时 ,对促进绿色巴夫藻生长的效果最佳 ,4 0 0 μg/L的浓度开始对生长出现抑制作用 ,但所有Mn2 +的试验浓度对叶绿素a含量的变化影响不显著。 4种微量金属元素都使绿色巴夫藻略微变小。

Four kinds of different concentrations of trace metal ion were added to culture solution of Pavlova viridis . The results showed that the optimum concentrations of Hg 2+ and Pb 2+ were 5 μg/L and 200 μg/L on the accelerating growth of Pavlova viridis , they also increased the content of chlorophyll-a. And in the concentrations of Hg 2+ ≥20 μg/L, the growth rate was restrained, while the content of chlorophyll a was reduced. All of Pb 2+ experiment concentrations could accelerate the growth and increase the content of chlorophyll a. The optimum growth concentrations of Co 2+ and Mn 2+ were 1 μg/L and 100 μg/L, and in Co 2+ ≥5 μg/L, Mn 2+ ≥400 μg/L, the growth of Pavlova viridis was restrained, but all of Co 2+' s experiment concentrations made the content of chlorophyll a reduce, and it wasn' t distinct for Mn 2+ to affect the conten of chlorophyll a. Four kinds of ion made Pavlova viridis change a little in size.