Influence of CO2 and Temperature on Metabolism and Development of Helicoverpa armigera (Noctuidae: Lepidoptera)
Influence of CO2 and Temperature on Metabolism and Development of Helicoverpa armigera (Noctuidae: Lepidoptera)
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DOI：
10.1093/ee/nvv144
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发表时间：
2016-02-01
影响因子：
1.7
通讯作者：
Sharma, H. C.
中科院分区：
文献类型：
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作者：
Akbar, S. Md.;Pavani, T.;Sharma, H. C.
由于二氧化碳和温度的升高，气候变化将对昆虫的生存和发展产生重大影响。为此，我们研究了CO2和温度对棉铃虫Helicoverpa armigera(Hubner)幼虫发育和代谢的直接影响。幼虫在一定范围的二氧化碳(350、550和750ppm)和温度(15、25、35和45摄氏度)条件下人工饲料饲养。CO2浓度升高对幼虫存活率、幼虫重量、幼虫期、化蛹和成虫羽化有负面影响，但对幼虫重量、幼虫期和繁殖力有正影响。温度升高对幼虫存活率、幼虫历期、幼虫体重和幼虫历期均有负面影响，但对幼虫生长有正向影响。化蛹和成虫羽化的最适温度为25℃，升高的CO2和温度通过提高中肠蛋白酶、碳水化合物酶(淀粉酶和纤维素酶)和线粒体酶的活性来增加幼虫的摄食量和代谢，因此可能对作物生产造成更大的损害。二氧化碳浓度升高和全球变暖将影响昆虫的生长发育，从而改变害虫与作物寄主之间的相互作用。因此，有必要了解这些相互作用，以制定减轻气候变化影响的战略。
Climate change will have a major bearing on survival and development of insects as a result of increase in CO2 and temperature. Therefore, we studied the direct effects of CO2 and temperature on larval development and metabolism in cotton bollworm, Helicoverpa armigera (Hubner). The larvae were reared under a range of CO2 (350, 550, and 750 ppm) and temperature (15, 25, 35, and 45 degrees C) regimes on artificial diet. Elevated CO2 negatively affected the larval survival, larval weight, larval period, pupation, and adult emergence, but showed a positive effect on pupal weight, pupal period, and fecundity. Increase in temperature exhibited a negative effect on larval survival, larval period, pupal weights, and pupal period, but a positive effect on larval growth. Pupation and adult emergence were optimum at 25 degrees C. Elevated CO2 and temperature increased food consumption and metabolism of larvae by enhancing the activity of midgut proteases, carbohydrases (amylase and cellulase), and mitochondrial enzymes and therefore may cause more damage to crop production. Elevated CO2 and global warming will affect insect growth and development, which will change the interactions between the insect pests and their crop hosts. Therefore, there is need to gain an understanding of these interactions to develop strategies for mitigating the effects of climate change.