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photoperiod
(redirected from photoperiodic)

    Also found in: Medical, Encyclopedia, Wikipedia 0.01 sec.
pho·to·pe·ri·od  (ft-pîr-d)
n.
The duration of an organism's daily exposure to light, considered especially with regard to the effect of the exposure on growth and development.
photo·peri·odic (-dk), photo·peri·odi·cal (--kl) adj.
photoperiod [ˌfəʊtəʊˈpɪərɪəd]
n
(Life Sciences & Allied Applications / Botany) the period of daylight in every 24 hours, esp in relation to its effects on plants and animals See also photoperiodism
photoperiodic  adj
photoperiodically  adv
photoperiod  (ft-pîr-d)
The duration of an organism's daily exposure to light, considered especially with regard to the phenomena of photoperiodism.
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Other subjects examined include biogenic amines and division of reproduction in social insects, sexual differences in seasonal adaptations of the rice bug, and photoperiodic host-seeking behavioral patterns of mosquitoes of medical importance.
Insect physiology; new research by SciTech Book News
Now, in the latest study, using specially designed photoperiodic chambers, which allow precise control over light exposure at night, he and his research team have demonstrated that manipulating light intensity at night, and thus melatonin production, dramatically affects human breast cancers growing in rats.
Late-night shift work 'ups cancer risk' by Asian News International
Spring-flushing trees expand new leaves synchronously during the dry season, because of the photoperiodic induction during the spring equinox and their access to subsoil water reserves (Rivera et al.
Leaf phenology and trunk growth of the deciduous tree fern Alsophila ... by Mehltreter, Klaus; Garcia-Franco, Jose G. / American Fern Journal
 
 
 
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