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镍对蚕豆和冬小麦细胞毒害程度的超微结构观察

DOI: 10.7668/hbnxb.1996.02.003, PP. 14-18

Keywords: ,蚕豆,冬小麦,细胞毒害,超微结构

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Abstract:

用透射电镜观察了镍化合物对蚕豆和冬小麦根端细胞超微结构的影响,结果表明,硫酸镍不同程度地引起蚕豆和冬小麦细胞的损伤。在15μg/ml浓度下,镍化合物可诱导蚕豆根端细胞核变形,液泡内有凝聚物断续性附着于液泡膜内侧。在相同浓度下,硫酸镍对冬小麦根端细胞内部结构影响较小。在80μg/ml浓度下,冬小麦细胞液泡有凝聚性变化,质壁有轻度分离。而蚕豆在此浓度处理下,核固缩,核膜崩解,细胞内部电子密度明显升高,结构呈凝聚状,欠清晰,液泡出现凝聚性变化,质壁出现重度分离。以上结果意味着镍化合物对蚕豆的损伤程度要高于对冬小麦的损伤程度。

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