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Photoperiodism

photoperiodism

(Science: biology) Events triggered by duration of illumination or pattern of light/dark cycles: often the wavelength of the illuminating light is important as for example in control of circadian rhythm in plants.

See: phytochromes. The response by organisms in response to the availability of light in their environment. Photoperiodism plays a part in some organisms [[biological clock but is primarily related to the way light affects plants flowering and the state of phytochrome.


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Action Spectrum - Red vs blue?

phytochrome and photoperiodism are important, but i think you missed the point of the discussion... By the way, red light is more effieciently used by plants because blue light has much more energy, which cannot be used. It's all ...

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by MrMistery
Fri Feb 23, 2007 7:43 pm
 
Forum: Botany Discussion
Topic: Action Spectrum - Red vs blue?
Replies: 15
Views: 5501

Action Spectrum - Red vs blue?

... wehther, whcich depend on short day and long day. it can not be explained here in detail. I suggest all to search the topic by the name of "PHOTOPERIODISM" in which it is clear that how Red or blue lights are effective in growth of plants and i also suggest to see the "PHYTOCHROME" ...

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by Ali Asim
Fri Feb 23, 2007 7:18 pm
 
Forum: Botany Discussion
Topic: Action Spectrum - Red vs blue?
Replies: 15
Views: 5501

homework

... a.which of these are under phoyoperiodic control? b.which are a response to a period of cold c.which is under endogenous control? ok.for a. photoperiodism refers to the regulation of seasonal effect by daylength. therefore anything to do with daylength that changes a pattern of animals will ...

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by chenwithasterisk
Fri Jan 12, 2007 8:48 am
 
Forum: Zoology Discussion
Topic: homework
Replies: 0
Views: 509


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