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海洋科学  2010 

条斑星鲽幼鱼变态期间核酸及蛋白的变化

, PP. 41-47

Keywords: 条斑星鲽(Verasper,moseri),幼鱼,DNA,RNA,蛋白

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Abstract:

本试验测定了条斑星鲽(Veraspermoseri)幼鱼变态过程中DNA、RNA、蛋白及其比值的变化,作为评价幼鱼变态阶段生长潜能的指标。结果表明,试验期间培育水温为16.5~18.0°C,DNA、RNA及蛋白的变化都带有发育阶段特异性。DNA含量在34~42日龄增加缓慢,然后快速增加直至44日龄,在45日龄和46日龄分别保持下降和上升趋势。蛋白含量和RNA含量的变化趋势相似,在试验期间保持快速增长的趋势。RNA/DNA比值从试验开始至35日龄呈上升状态,36日龄时下降,38日龄时达到最高值5.01,然后显著下降(P<0.05),在试验结束时达到最低值1.76。蛋白/DNA在40日龄时达到最高值58.64,在46日龄时达到最低值21.28。RNA、DNA及蛋白含量跟全长和体质量有明显的线性关系(P<0.05)。RNA/DNA与全长和体质量的关系比蛋白/DNA与全长和体质量的关系密切。蛋白/DNA比值的变化趋势跟RNA/DNA比值类似,但前者的变化滞后于后者,表明RNA/DNA比值是评价条斑星鲽生理状况的更有效的生理指标。

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