数字农科院2.0

Experimental Warming Induces Oxidative Stress And Immunosuppression In A Viviparous Lizard, Eremias Multiocellata

文献类型： 外文期刊

作者： Han, XZ; Hao, X; Wang, Y; Wang, XF; Teng, LW; Liu, ZS; Zhang, FS; Zhang, Q

作者机构：

关键词： Climate Warming; Lizard; Immune Response; Reactive Oxygen Species; Survival; Temperature

期刊名称： JOURNAL OF THERMAL BIOLOGY

ISSN： 0306-4565

年卷期： 2020 年 90 卷

页码：

收录情况： JCR（2021版）

摘要： Reptiles are especially vulnerable to climate warming because their behavior, physiology, and life history are highly dependent on environmental temperature. In this study, we envisaged new probable mechanisms underlying the high vulnerability of lizards, wherein heat exposure induces oxidative stress and leads to immunosuppression. To test this hypothesis, we conducted a warming experiment on a lizard (Eremias multiocellata) from a desert steppe in Inner Mongolia from May to September using open-top chambers set up in their natural habitat and compared the components of oxidative stress (antioxidant ability [Superoxide dismutase (SOD) activity], extent of oxidative damage [malondialdehyde (MDA) content]), and immunocompetence (white blood cells [WBC] counts and immunoglobulin M [IgM] expression) between the warming and control groups. At the end of the experiment, the warming treatment did not affect the survival rate of the lizards. However, MDA content, but not SOD activity, was significantly higher in the warming group than in the control group. The WBC counts and IgM expression were significantly lower in the warming group than in the control group. Our results verified our hypothesis and provided novel cues and methods for the investigation of the mechanisms behind the high probability of extinction of other ectotherms under warming conditions.

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