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Effects of copper, nickel and zinc on biochemical parameters and metal accumulation in gouan, Aeluropus littoralis

机译:铜,镍和锌对鹅绒螯虾生化参数和金属累积的影响

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摘要

To study the effects of three heavy metals (Cu, Zn and Ni) on Aeluropus littoralis, a halophytic plant, a research was carried out in greenhouse. The study was laid out in a randomized complete block design with 5 replicates. Two different concentrations (50 μM and 100 μM) for each metal were used. Some cellular oxidative biomarkers such as activity of three main antioxidant enzymes (superoxide dismutase (SOD), guaiacol peroxidase (GPx) and catalase (CAT)), as well as accumulation of proline, phenolic compounds, photosynthetic pigments and soluble protein content were investigated. The results showed that the proline and phenolic compounds accumulated with increasing heavy metal concentrations, while total chlorophyll content decreased in all treatments. Heavy metals contents in shoots increased with the increasing of heavy metals concentration without any important morphological changes. In all treatments SOD activity increased, but GPx activity decreased while CAT activity and soluble protein only decreased in Ni and Cu treatments, respectively. The results showed that chlorophyll a was more sensitive to Zn and Ni, but chlorophyll b was more sensitive to Cu. In addition, it was revealed that each heavy metal has unique biotoxicities or biofunctions and affects the analyzed parameters plant in particular way. Consequently, A. littoralis heavy metal tolerance depends on the species and concentration of metal.
机译:为了研究三种重金属(铜,锌和镍)对盐生植物鸢尾(Aeluropus littoralis)的影响,在温室中进行了一项研究。研究以5个重复的随机完整区组设计进行。每种金属使用两种不同的浓度(50μM和100μM)。研究了一些细胞氧化生物标记物,例如三种主要抗氧化剂酶(超氧化物歧化酶(SOD),愈创木酚过氧化物酶(GPx)和过氧化氢酶(CAT))的活性,以及​​脯氨酸,酚类化合物,光合色素和可溶性蛋白质含量的积累。结果表明,脯氨酸和酚类化合物随着重金属浓度的增加而累积,而所有处理中的总叶绿素含量均下降。枝条中的重金属含量随重金属浓度的增加而增加,并且没有任何重要的形态变化。在所有处理中,SOD活性均增加,但GPx活性降低,而CAT活性和可溶性蛋白分别仅在Ni和Cu处理中降低。结果表明,叶绿素a对Zn和Ni更为敏感,而叶绿素b对Cu更为敏感。此外,还发现每种重金属具有独特的生物毒性或生物功能,并以特定方式影响植物的分析参数。因此,滨海土壤杆菌对重金属的耐受性取决于金属的种类和浓度。

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