Te(Ⅳ)胁迫对钝顶螺旋藻的生长及生理生化的影响

Effects of tellurium stress on growth and biochemistry of Spiurlina platensis

在钝顶螺旋藻(Spirulina platensis)不同的生长阶段添加Te(Ⅳ),设置4个实验组,分别从第1天至第4天开始添加Te(Ⅳ),研究Te(Ⅳ)胁迫对S.platensis中各种活性成分的影响.结果表明,在碲累积添加量均为650 mg.L-1的情况下,随Te(Ⅳ)添加时间的后移,碲胁迫强度减小,碲对S.platensis生长的抑制作用减小;水溶性蛋白的质量分数随着碲胁迫强度的减小而增加,较低的碲胁迫强度下,水溶性蛋白的质量分数高于对照组,藻蓝蛋白和别藻蓝蛋白的质量分数均低于对照组,变化趋势与水溶性蛋白相似;与对照组相比,各实验组的超氧化物歧化酶活性均上升,且随着碲胁迫强度的增大而增加;碲胁迫并没有改变螺旋藻中的色素组成,叶黄素、β-胡萝卜素和叶绿素a的质量分数明显下降.

Add Te(Ⅳ) in Spirulina platensis at different growing phases.There were four test sets,which were added Te(Ⅳ) from the 1^(th) to the 4^(th) respectively.The accumulative concentration was 650 mg·L^(-1).Effects of Te(Ⅳ) stress on active component of Spiurlina platensis were studied.It was indicated that the inhibition of Te(Ⅳ) stress on growth of S.platensis weakened with the decrease of stress intensity of Te(Ⅳ) .Contents of soluble protein(SP) decreased with the increase of stress intensity of Te(Ⅳ).At low...