镉对甜菜根（L.）根的影响。
Effect of cadmium on the roots of beetroot ( L.).
机构信息
a Siberian Institute of Plant Physiology and Biochemistry, Russian Academy of Sciences , Irkutsk , Russia.
b Faculty of Biology and Soil Sciences, Irkutsk State University , Irkutsk , Russia.
出版信息
Int J Phytoremediation. 2019;21(10):980-984. doi: 10.1080/15226514.2019.1583722. Epub 2019 Apr 24.
The article dwells upon identifying the effect of cadmium on the roots of beetroot. The exposure effects of various concentrations of cadmium were studied at different levels of the plant organization (tissue pieces, organelles, membrane vesicles). The effect was noted only at a concentration of 100μm. The negative effect of cadmium on the roots tissues of beetroot appeared with an increase in permeability and a decrease in the stability of cell membranes due to a change in the composition of fatty acids of membrane lipids and an increase in oxidation processes. The effect of cadmium in model experiments on the activity of the proton pumps of the vacuolar membrane has been evaluated. The pumps provide for the transport of heavy metals into the vacuole, which is one of the effective mechanisms for phytoremediation. The influence of cadmium in model experiments on the activity of the proton pump of a vacuolar membrane was evaluated. Under the influence of cadmium, a decrease in the activity of V-ATPase was observed, while the activity of V-PPase did not change. The results obtained complement our understanding of the damaging effects that occur in plant cells under cadmium stress.
本文探讨了镉对甜菜根的根的影响。在不同的植物组织水平（组织切片、细胞器、膜囊泡）下研究了不同浓度镉的暴露效应。只有在 100μm 的浓度下才观察到了镉的负效应。由于膜脂脂肪酸组成的变化和氧化过程的增加，导致细胞膜的稳定性降低，通透性增加，从而使镉对甜菜根根组织产生了负面影响。评估了在模型实验中，镉对液泡膜质子泵活性的影响。泵为重金属向液泡内的运输提供了保障，这是植物修复的有效机制之一。在模型实验中评估了镉对液泡膜质子泵活性的影响。在镉的影响下，观察到 V-ATPase 的活性降低，而 V-PPase 的活性没有变化。这些结果补充了我们对镉胁迫下植物细胞中发生的损伤效应的理解。
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