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How Plants Detect Day Length to Time Flowering
植物如何感知日照长度来决定开花时间
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Plants have light-sensitive proteins called phytochromes in their leaves.植物叶片中含有感光蛋白，称为光敏色素。
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These proteins measure how long darkness lasts each night.这些蛋白可测量每晚黑暗持续的时间。
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Short nights tell some plants spring is coming.短夜提示某些植物春天将至。
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Long nights signal others that autumn is near.长夜则向另一些植物发出秋天临近的信号。
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This timing system is called photoperiodism.这种计时机制称为光周期现象。
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It helps flowers bloom when pollinators are most active.它有助于花朵在传粉者最活跃时绽放。
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Even indoor plants respond to artificial light cycles.即便是室内植物也会对人工光照周期产生反应。
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Farmers use this knowledge to control harvest seasons precisely.农民利用这一知识精准调控收获季节。