photoperiodic response

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• agricultural technology — Introduction       application of techniques to control the growth and harvesting of animal and vegetable products. Soil preparation       Mechanical processing of soil so that it is in the proper physical condition for planting is usually… …   Universalium

• phytochrome — /fuy teuh krohm /, n. Bot. a plant pigment that is associated with the absorption of light in the photoperiodic response and that may regulate various types of growth and development. [1890 95; PHYTO + CHROME] * * * …   Universalium

• phytochrome — phy•to•chrome [[t]ˈfaɪ təˌkroʊm[/t]] n. bot a plant pigment that is associated with the absorption of light in the photoperiodic response and that may regulate various types of growth and development • Etymology: 1890–95 …   From formal English to slang

• 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

• Photoperiodism — is the physiological reaction of organisms to the length of day or night. It occurs in plants and animals. Contents 1 In plants 1.1 Long day plants 1.2 Short day plants 1.3 …   Wikipedia

• Yellow-throated Sparrow — At Keoladeo National Park, India Conservation status …   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

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

• pho|to|pe|ri|od|i|cal — «FOH toh PIHR ee OD uh kuhl», adjective. = photoperiodic: (Cf. ↑photoperiodic) »There is some kind of photoperiodical response in every higher plant (Science News Letter) …   Useful english dictionary

• Diapause — is the delay in development in response to regularly and recurring periods of adverse environmental conditions.[1][2] It is considered to be a physiological state of dormancy with very specific initiating and inhibiting conditions. Diapause is a… …   Wikipedia

• photoperiodism — /foh teuh pear ee euh diz euhm/, n. Biol. the response, as affecting growth or reproduction, of an organism to the length of exposure to light in a 24 hour period. Also called photoperiodicity /foh toh pear ee euh dis i tee/. [1915 20;… …   Universalium