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N the response of plants and animals by behaviour, growth, etc, to photoperiods 光周期现象
Photoperiodism The response of an organism to changes in day length.
植物对于日照长度改变所引起的反应。
The respose was not caused by the effects of temperature, photosynthetic duration or pre-flowering photoperiodic after-effect but was typical photoperiodism.
这种反应属于典型的光周期现象，而不是由温度的替代作用、光合时间的改变或前期短日后效应引起的。
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