Effects of Cu2+ and Zn2+ on growth and physiological characteristics of green algae, Cladophora
2015
Cao, De-ju | Xie, Pan-pan | Deng, Juan-wei | Zhang, Hui-min | Ma, Ru-xiao | Liu, Cheng | Liu, Ren-jing | Liang, Yue-gan | Li, Hao | Shi, Xiao-dong
Effects of various concentrations of Cu²⁺ and Zn²⁺ (0.0, 0.1, 0.25, 0.5, or 1.0 mg/L) on the growth, malondialdehyde (MDA), the intracellular calcium, and physiological characteristics of green algae, Cladophora, were investigated. Low Zn²⁺ concentrations accelerated the growth of Cladophora, whereas Zn²⁺ concentration increases to 0.25 mg/L inhibited its growth. Cu²⁺ greatly influences Cladophora growth. The photosynthesis of Cladophora decreased under Zn²⁺ and Cu²⁺ stress. Cu²⁺ and Zn²⁺ treatment affected the content of total soluble sugar in Cladophora and has small increases in its protein content. Zn²⁺ induced the intracellular calcium release, and copper induced the intracellular calcium increases in Cladophora. Exposure to Cu²⁺ and Zn²⁺ induces MDA in Cladophora. The stress concent of Cu²⁺ was strictly correlated with the total soluble sugar content, Chla+Chlb, and MDA in Cladophora, and the stress concent of Zn²⁺ was strictly correlated with the relative growth rate (RGR) and MDA of Cladophora.
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