Antioxidant Responses of Ragweed Leaf Beetle Ophraella communa (Coleoptera: Chrysomelidae) Exposed to Thermal Stress

文献类型： 外文期刊

第一作者： Guo, Jianying

作者： Guo, Jianying;Wan, Fanghao;Zhou, Zhongshi;Chen, Hongsong;Solangi, Ghulam Sarwar

作者机构：

关键词： Ophraella communa; thermal stress; total protein; antioxidant enzymes activity; biological control

期刊名称：FRONTIERS IN PHYSIOLOGY （ 影响因子：4.566； 五年影响因子：4.804 ）

ISSN： 1664-042X

年卷期： 2018 年 9 卷

页码：

收录情况： SCI

摘要： Ophraella communa LeSage is an effective biological control agent of common ragweed, Ambrosia artemisiifolia L., which competes with crops and causes allergic rhinitis and asthma. However, thermal stress negatively affects the developmental fitness and body size of this beetle. High temperatures cause a variety of physiological stress responses in insects, which can cause oxidative damage. We investigated the total protein content and activity of antioxidant enzymes including superoxide dismutase (SOD), catalase (CAT), and peroxidases (PODs) in O. communa adults when its different developmental stages were exposed to high temperatures (40, 42, and 44 degrees C) for 3 h each day for 3, 5, 5, and 5 days, respectively (by stage), and a whole generation to high temperatures (40, 42, and 44 degrees C) for 3 h each day. A control group was reared at 28 +/- 2 degrees C. Under short-term daily phasic high-temperature stress, total protein contents were close to the control as a whole; overall, SOD activities increased significantly, CAT activities were closer to or even higher than the control, POD activities increased at 40 degrees C, decreased at 42 or 44 degrees C; stage-specific response was also observed. Under long-term daily phasic high-temperature stress, total protein content increased significantly at 44 degrees C, SOD activities increased at higher temperatures, decreased at 44 degrees C; CAT activities of females increased at <= 42 degrees C, and decreased at 44 degrees C, CAT activities of males decreased significantly; POD activities of females increased at 40 degrees C, decreased at >= 42 degrees C, POD activities of males decreased at 44 degrees C; and antioxidant enzymes activities in females were significantly higher than those in males. Antioxidative enzymes protect O. communa from oxidative damage caused by thermal stress.

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