photoperiodic cycle

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• photophase — noun Date: 1944 1. light reaction 2. the light period of a photoperiodic cycle of light and dark …   New Collegiate Dictionary

• photophase — ˈfōd.ōˌfāz noun Etymology: phot + phase 1. : light reaction herein 2. : the light period of a photoperiodic cycle of light and dark …   Useful english dictionary

• plant development — Introduction       a multiphasic process in which two distinct forms succeed each other in alternating generations. One form, created by the union of sexual cells (gametes (gamete)), contains two sets of similar chromosomes (diploid). At sexual… …   Universalium

• Circadian rhythm — Circadian redirects here. For the album by the rock band 5th Projekt, see Circadian (album). Some features of the human circadian biological clock A circadian rhythm, popularly referred to as body clock, is an endogenously driven, roughly 24 hour …   Wikipedia

• Insect winter ecology — entails the overwinter survival strategies of insects, which are in many respects more similar to those of plants than to many other animals, such as mammals and birds. This is because unlike those animals, which can generate their own heat… …   Wikipedia

• Melatonin — Not to be confused with Melanin or Melanotan. Melatonin Systematic (IUPAC) name …   Wikipedia

• Light pollution — This article is about light pollution in the visible spectrum. For information on pollution in the radio spectrum, see radio spectrum pollution. This time exposure photo of New York City at night shows skyglow, one form of light pollution …   Wikipedia

• coloration — colorational, adj. colorationally, adv. /kul euh ray sheuhn/, n. appearance with regard to color arrangement or use of colors; coloring: the bold coloration of some birds. [1605 15; COLOR + ATION] * * * ▪ biology Introduction       in biology,… …   Universalium

• horticulture — horticultural, adj. horticulturist, n. /hawr ti kul cheuhr/, n. 1. the cultivation of a garden, orchard, or nursery; the cultivation of flowers, fruits, vegetables, or ornamental plants. 2. the science and art of cultivating such plants. [1670… …   Universalium

• photoperiod — noun Date: 1920 a recurring cycle of light and dark periods of constant length; also photophase 2 • photoperiodic adjective • photoperiodically adverb …   New Collegiate Dictionary

• Moonlight — For other uses, see Moonlight (disambiguation). The painting Dovedale by Moonlight. Moonlight is the light that reaches Earth from the Moon. This light does not originate from the Moon, but from sunlight. The Moon does not, however, reflect… …   Wikipedia