Light-break experiments and photoperiodic time measurement in the spider mite Tetranychus urticae
Light-break experiments and photoperiodic time measurement in the spider mite Tetranychus urticae
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二斑叶螨的光断实验和光周期时间测量
DOI：
10.1016/0022-1910(84)90064-7
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发表时间：
1984
影响因子：
2.2
通讯作者：
A. Veerman
中科院分区：
文献类型：
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作者：
M. Nunes;A. Veerman
为了解释荨叶螨（螨目：叶螨科）滞育的光周期诱导机制，建立了一个由“时钟”和光周期“计数器”机制两部分组成的理论模型。时钟根据沙漏动力学执行光周期时间测量；该计数器通过将对光周期敏感的螨虫发育阶段所经历的“长”夜和“短”夜的数量相加，来积累包含在若干连续的光暗周期中的光周期信息。昼夜节律系统对光周期诱导的影响被解释为对光周期反应表达的抑制作用；这种效应只在某些光周期制度下才会遇到，在这种制度下，昼夜节律系统和光周期彼此不“共振”。该“沙漏计时器振荡计数器模型”旨在从理论上解释光周期时间测量、光周期信息的总和以及昼夜节律系统对光周期诱导的影响，该模型与在对称和非对称“骨架”光周期（后者基于日光和非日光光暗周期）中使用T. urticae获得的实验结果一致。
To explain photoperiodic induction of diapause in the spider mite Tetranychus urticae (Acarina: Tetranychidae) a theoretical model was developed, consisting of two components, viz. a “clock” and a photoperiodic “counter” mechanism. The clock executes photoperiodic time measurement according to hourglass kinetics; the counter accumulates the photoperiodic information contained in a number of successive light dark cycles by adding up the number of “long” and “short” nights experienced by the developmental stages of the mites sensitive to the photoperiod. The influence of the circadian system on photoperiodic induction is interpreted as an inhibitory effect exerted on the expression of the photoperiodic response; this effect is encountered only in certain photoperiodic regimes, where the circadian system and the photoperiod are out of “resonance” with each other. This “hourglass timer oscillator counter model”, devised to give a theoretical explanation of photoperiodic time measurement, the summation of photoperiodic information, and the influence of the circadian system on photoperiodic induction, proved to be consistent with experimental results obtained with T. urticae in both symmetrical and asymmetrical “skeleton” photoperiods, the latter based on diel as well as non-diel light dark cycles.