Effects of UV-B radiation on the survival, egg hatchability and transcript expression of antioxidant enzymes in a high-temperature adapted strain of Neoseiulus barkeri.

Authors:
Ya-Ying Li
Ya-Ying Li
Taipei City Hospital
Taiwan
Xian Wang
Xian Wang
School of Basic Medical Sciences
West Lafayette | United States
Wen-Hui Fan
Wen-Hui Fan
Xi'an Institute of Optics and Precision Mechanics
China
Ge Wang
Ge Wang
School of Biomedical Engineering and Sciences
United States
Jing-Yu Liang
Jing-Yu Liang
China Pharmaceutical University
China
Zi-Ying Wang
Zi-Ying Wang
College of Plant Protection
China
Huai Liu
Huai Liu
Sun Yat-sen University Cancer Center
China

Exp Appl Acarol 2019 Apr 6;77(4):527-543. Epub 2019 May 6.

Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest University, Chongqing, 400715, China.

Biological control of spider mites in hot and dry weather is a serious technical issue. A high-temperature adapted strain (HTAS) of the predatory mite Neoseiulus barkeri Hughes was selected from its conventional strain (CS), via long-term heat acclimation and frequent heat hardenings in our previous studies. However, the environment of high temperature is usually associated with enhanced ultraviolet (UV) radiation. In the present study, the physiological effects of UV-B radiation on survival rate and egg damage of N. barkeri were investigated, as well as the activities and expression profiles of antioxidant enzymes to UV-B radiation stress. UV-B radiation had deleterious effects on egg hatchability and survival of N. barkeri. Adults of the HTAS strain were less UV-B resistant than those of the CS strain; they also had lower levels of enzymatic activity of superoxide dismutase (SOD) and catalase against oxidative damage and weaker upregulation of SOD genes. The mRNA expression of three SOD genes of CS adult females immediately increased whereas that of HTAS showed almost no difference under UV-B stress for 1 h. The results showed the HTAS of N. barkeri had lower fitness under UV-B stress compared with the CS of N. barkeri. These results suggested that long-term heat acclimation may exert a profound impact on the developmental physiology of N. barkeri.

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http://dx.doi.org/10.1007/s10493-019-00361-9DOI Listing
April 2019
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