Gray DR, Ravlin FW, Braine JA
Natural Resources Canada, Canadian Forest Service, Laurentian Forestry Centre, 1055 du P.E.P.S., P.O. Box 3800, Québec, G1V 4C7, Sainte-Foy, Canada
J Insect Physiol. 2001 Feb 1;47(2):173-184. doi: 10.1016/s0022-1910(00)00103-7.
We present here the first recorded age-specific estimates of the developmental response to temperature in diapausing gypsy moth, Lymantria dispar (L.). The effect of temperature on diapause development in gypsy moth eggs was examined by exposing individual eggs to temperature regimes of 5 degrees C interrupted by a single, brief exposure to an experimental temperature. Exposure to each of six experimental temperatures took place at six different times during diapause. The relative effect of the exposure on diapause development was estimated by comparing the duration of diapause in each of the treatments to the duration in a control treatment of constant 5 degrees C. The effect of each temperature did not remain constant throughout the diapause phase and the pattern of change was not uniform among the experimental temperatures. We propose a model of diapause where the developmental phase is controlled by two simultaneous temperature-dependent processes: a typical developmental response to temperature that is inhibited by a temperature-activated biochemical agent, and the temperature-dependent removal of the inhibiting agent. This simple model of two simultaneous and temperature-dependent processes explains 92% of the variability in diapause duration observed in the experimental regimes.
我们在此呈现首次记录的滞育期舞毒蛾（Lymantria dispar (L.)）发育对温度反应的特定年龄估计值。通过将单个卵暴露于5摄氏度的温度环境，并穿插单次短暂暴露于实验温度，来研究温度对舞毒蛾卵滞育发育的影响。在滞育期间的六个不同时间点，将卵暴露于六种实验温度中的每一种。通过比较每种处理中滞育的持续时间与恒定5摄氏度对照处理中的持续时间，来估计暴露对滞育发育的相对影响。在整个滞育阶段，每种温度的影响并非保持恒定，且实验温度之间变化模式也不一致。我们提出了一个滞育模型，其中发育阶段由两个同时进行的温度依赖性过程控制：一个是对温度的典型发育反应，被一种温度激活的生化因子抑制；另一个是温度依赖性地去除抑制因子。这个由两个同时进行且依赖温度的过程组成的简单模型，解释了在实验条件下观察到的滞育持续时间92%的变异性。
