Effect of low temperature stress on antioxidase activity of western flower thrips,Frankliniella occidentalis
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Key Words：Frankliniella occidentalis, antioxidant enzymes, low temperature stress
Abstract：
The western flower thrip (WFT), Frankliniella occidentalis (Pergande) is a key invasive insect. Temperature is one of the most important abiotic factors affecting the winter survival rate and geographical distribution of WFT. We studied the activities of four antioxidant enzymes under low temperature stress. We found that these four antioxidant enzymes exhibited different responses in relation to low temperature stress. Low temperature can significantly improve the activity of SOD, but suppress the activity of POD. However, the activities of CAT and GST first decreased, then increased, in response to low temperature. Our results thus indicate that these four antioxidases may play an important role in WFT’s response to low temperature stress.