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首页> 美国卫生研究院文献>Scientific Reports >Summer diapause induced by high temperatures in the oriental tobacco budworm: ecological adaptation to hot summers
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Summer diapause induced by high temperatures in the oriental tobacco budworm: ecological adaptation to hot summers

机译：东方烟草芽虫中高温引起的夏季滞育：对炎热夏季的生态适应

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摘要

Summer diapause in Helicoverpa assulta (Hübner), which prolongs the pupal stage, particularly in males, is induced by high temperatures. In the laboratory, 3rd-, 4th-, 6th-instar and prepupal larvae were exposed to high temperatures – 33 and 35 °C with a photoperiod of LD16:8 – until pupation to induce summer diapause. The results showed that the incidence of summer diapause was influenced by temperature, stage exposed, and sex. The higher the temperature, the more often summer diapause was attained. Sixth-instar and prepupal larvae were the sensitive stages for summer diapause induction. H. assulta summer-diapausing pupae needed diapause development to resume development when temperatures became favorable. Furthermore, both body mass and energy storage capacity (lipid and glycogen) were significantly affected by diapause rather than sex, and were significantly higher in summer-diapausing pupae than in non-diapausing pupae. In addition, the body mass loss and respiration rate showed that the rate of metabolism in the summer-diapausing pupae was consistently lower than in non-diapausing pupae, which were significantly affected by diapause and pupal age. We conclude that summer diapause in H. assulta is a true diapause, and H. assulta has evolved mechanisms to accumulate energy storage and to lower its metabolism to adapt to hot summers.
机译：高温会导致Helicoverpa assulta（Hübner）夏季滞育，延长幼仔期，尤其是雄性。在实验室中，三龄和四龄幼虫和pu前幼虫暴露在高温下– 33和35°° C的光周期为LD16：8 –直到化脓以诱导夏季滞育。结果表明，夏季滞育的发生率受温度，暴露的阶段和性别的影响。温度越高，夏季滞育的频率越高。六龄和pu前幼虫是夏季滞育诱导的敏感阶段。当温度变得有利时，H。assulta夏季渗水p需要滞育发育才能恢复发育。此外，滞育而不是性别对体重和能量存储能力（脂质和糖原）都有显着影响，并且在夏季停滞的p中显着高于非停滞的up。此外，体质损失和呼吸速率表明，夏季滞尿的up的代谢率始终低于非滞尿的in，这受到滞育和p年龄的显着影响。我们得出的结论是，冬瓜滞育是真正的滞育，而冬瓜已经进化出积累能量存储和降低其代谢的机制，以适应炎热的夏季。

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