Is transpiration a form of circadian rhythm?  I am having trouble answering this question for my biology homework. I know that circadian rhythm refers to regular activities that occur within 24...

Is transpiration a form of circadian rhythm?

 

I am having trouble answering this question for my biology homework. I know that circadian rhythm refers to regular activities that occur within 24 hour periods, and I need to give 2 examples, so is transpiration a form of circadian rhythm?

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pacorz | High School Teacher | (Level 3) Educator

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Circadian rhythms are found in most plants and animals. These rhythms operate on a twenty four hour period, and are endogenous, meaning that they are internally generated by the plant or animal. If the plant or animal is isolated from external time cues such as light-dark cycles, processes that are identified as circadian rhythms are those that will keep on functioning on a twenty four hour schedule even without the cues. Additionally, circadian rhythms generally operate independently of temperature changes.

Botanical examples of circadian phenomena include leaf movements such as the wake/sleep leaf position of many species of bean plants,the transcription of DNA, flower opening and closing, elongation of the hypocotyl during seed germination, and immune responses to pathogens.

Transpiration is not a circadian phenomenon because it is controlled by the interplay of water availability, temperature, and sunlight.

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