【摘要】 西花蓟马Frankliniella occidentalis(Pergande)是一种重要入侵害虫。温度是影响西花蓟马生长发育和繁殖的一个重要非生物因子,西花蓟马对温度的耐受性决定了它的越冬存活率和地理分布。本文研究了4种抗氧化酶在低温胁迫下的活力变化。结果表明,4种抗氧化酶对低温胁迫具有不同的响应模式。低温处理能显著提高SOD的活力,对POD的活力则具有明显的抑制作用;然而,CAT和GST的活力在低温胁迫处理表现为先降低,随后逐渐提高的趋势。本研究结果表明4种抗氧化酶在西花蓟马应对低温胁迫中具有重要作用。更多还原

【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.更多还原