THERMOPERIODISM, PHOTOPERIODISM AND SENSITIVE STAGE IN THE DIAPAUSE INDUCTION OF SESAMIA NONAGRIOIDES (LEPIDOPTERA, NOCTUIDAE)
THERMOPERIODISM, PHOTOPERIODISM AND SENSITIVE STAGE IN THE DIAPAUSE INDUCTION OF SESAMIA NONAGRIOIDES (LEPIDOPTERA, NOCTUIDAE)
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DOI：
10.1016/0022-1910(94)90082-5
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发表时间：
1994-02-01
影响因子：
2.2
通讯作者：
ALBAJES, R
中科院分区：
文献类型：
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作者：
EIZAGUIRRE, M;LOPEZ, C;ALBAJES, R
光周期是诱导芝麻幼虫滞育的主要因素。恒温和温周期是与光周期相互作用诱导滞育的附加因子。恒温改变了滞育对日长的反应曲线，从III型（25 ℃）变为I型（18 ℃）。光周期诱导滞育的增强叠加的热周期，无论低温是否符合暗相或与暗相。然而，恒定的温度和热周期本身诱导滞育的光周期信号的情况下。低（18摄氏度）恒定的温度诱导100%滞育的幼虫饲养下连续黑暗。此外，在连续的黑暗中，滞育诱导50%的幼虫时，他们饲养下的温度周期制度[30摄氏度（13小时）：18摄氏度（11小时）]相比，0%滞育，如果幼虫饲养下25摄氏度恒温。逐渐增加和减少光周期并不改变滞育反应，但逐渐减少的日照缩短了幼虫的发育时间。1、2龄幼虫对光周期诱导滞育最为敏感。短日照对幼虫滞育的诱导作用可以通过在晚龄暴露于长日照来逆转。
Photoperiod is the major factor governing the induction of larval diapause in Sesamia nonagrioides. Constant temperature and thermoperiod were shown to be additional factors which interact with photoperiod to induce diapause. Constant temperature modified the diapause response curve to daylength from a type III (at 25 degrees C) to a type I (at 18 degrees C). Photoperiodic induction of diapause was enhanced by superimposed thermoperiods regardless of whether the low temperature coincided with the scotophase or with the photophase. However, constant temperature and thermoperiods per se induced diapause in the absence of photoperiodic signals. Low (18 degrees C) constant temperatures induced 100% diapause in larvae reared under continuous darkness. Also in continuous darkness, diapause was induced in a 50% of larvae when they were reared under a thermoperiodic regime [30 degrees C (13 h):18 degrees C (11 h)] in comparison with 0% diapause if larvae were reared under 25 degrees C constant temperature. Gradually increasing and decreasing photoperiods did not modify the diapause response but the gradual decrease of daylength shortened the larval developmental time. First and second larval instars were the most sensitive to diapause induction by photoperiod. The diapause-inducing effect of short daylengths on young larvae can be reversed by exposure to long daylengths in the late instars.