Questions tagged [photoperiod]

the interval in a 24-hour period during which a plant or animal is exposed to light. Use this tag in questions regarding the responses of plants (or animals) to photoperiods i.e. photoperiodism and the study of such responses.

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Can plants photosynthesize all-day?

If a plant was given sunlight even during the night, with appropriate constant intensity during day and night, will the plant be able to maintain health and normally photosynthesize throughout the day?...
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Effect of interruption of photoperiod in a short day plant

When a short day plant is exposed to its critical period of darkness it flowers. But when it is exposed to a small period of red light which exceeds the critical period it doesn't flower. But when it ...
6
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1answer
199 views

Total dark deprivation at day-neutral plants

First of all, I am not a biologist. Almost for a week, a question has come to my mind: "Is it harmful ceaselessly exposing a plant to light?" (I mean with natural & artificial light with proper ...
2
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0answers
25 views

How to seek information on the duration of biological entrainment processes in mammals? [closed]

This is a question that is a little bit hard to define for me. I'm interested in learning more about times of "attractor/entrainment" processes that may take place in the body/brain of mammals, and ...
4
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1answer
167 views

What light intensity determines the start/end of a photoperiod in humans?

I'm reading this article, which discusses the influence of Long Photoperiod (LP) and Short Photoperiod (SP) on melatonin production: HIOMT drives the photoperiodic changes in the amplitude of the ...