photoperiod

Examples of photoperiod in the following topics:

• Pineal Gland and Gonads

  • The rate of melatonin production is affected by the photoperiod.
  • During the day photoperiod, little melatonin is produced; however, melatonin production increases during the dark photoperiod (night).

• Plant Responses to Light

  • Plants use light to track time, which is known as photoperiodism.

• The Phytochrome System and Red Light Response

  • Photoperiodism is a biological response to the timing and duration of dark and light periods.

• Genetic Control of Flowers

  • In order to flower at an appropriate time, a plant can interpret important endogenous and environmental cues such as changes in levels of plant hormones and seasonable temperature and photoperiod changes.

• Uterus

  • Depending on the species and attributes of physical and psychological health, weight, environmental factors of circadian rhythm, photoperiodism (the physiological reaction of organisms to the length of day or night), the effect of menstrual cycles to the reproductive function of the uterus is subject to hormone production, cell regeneration, and other biological activities.