Skopik S D, Takeda M
Am J Physiol. 1980 Sep;239(3):R259-64. doi: 10.1152/ajpregu.1980.239.3.R259.
Oviposition activity in the European corn borer, Ostrinia nubilalis, is under circadian control. Light cycles entrain the rhythm, and the system free-runs in constant darkness (DD) with a circadian period (tau). The lability of tau is evident in the DD free runs following entrainment to various light cycles. Oviposition activity is strongly suppressed in constant light but a circadian rhythm is initiated upon transfer to DD. The phase-response curve (PRC) for 1-h light pulses is type 1, not type 0 as predicted by Beck's dual system theory. The PRC can be used to predict entrained steady states in non-24-h light cycles (T's). Predicted phase relationships between the light component of the cycle and the rhythm in T19 and T26 are in close agreement with the observed peaks of oviposition. Symmetric skeleton photoperiods (two 1-h light pulses per cycle) also entrain the rhythm to the shorter of the two alternatives that are possible in these regimes.
欧洲玉米螟（Ostrinia nubilalis）的产卵活动受昼夜节律控制。光周期能调节这种节律，并且该系统在持续黑暗（DD）中以昼夜周期（tau）自由运行。在适应各种光周期后的DD自由运行中，tau的不稳定性很明显。在持续光照下产卵活动受到强烈抑制，但转移到DD时会启动昼夜节律。1小时光脉冲的相位响应曲线（PRC）是1型，而不是贝克双系统理论预测的0型。PRC可用于预测非24小时光周期（T's）中的稳定状态。在T19和T26中，周期的光成分与节律之间预测的相位关系与观察到的产卵峰值密切一致。对称骨架光周期（每个周期两个1小时光脉冲）也能将节律调节到这些模式下可能的两种选择中较短的那个。
