Plant sleep movements sequence #2

Plant sleep movements sequence #2

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Caption: Common bean (Phaseolus vulgaris) seedling 'sleeping' at 10:00 p.m.. The leaves are oriented in the vertical plane to reduce transpiration. In the previous photo in the sequence (noon) the leaves had moved to a horizontal position to photosynthesize. These movements are governed by an internal circadian clock (circadian rhythm) that stimulates variations in turgor pressure between day and nighttime.

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Keywords: angiosperm, bean, bean plant, circadian, circadian clock, common bean, cotyledons, cycle, dicot, dicots, dicotyledon, dicotyledons, flowering plant, green, internal, kidney, legume, nature, phaseolus, phaseolus vulgaris, plant, rhythm, science, seedling, sequence, sleep movement, sleep movements, turgor movement, turgor pressure

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