photoperiod

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Related to photoperiods: sporophyte, gametophyte

photoperiod

 [fo´to-pēr″e-od]
the period of time per day that an organism is exposed to daylight (or to artificial light). adj., adj photoperiod´ic.

photoperiod

/pho·to·pe·ri·od/ (fo´to-pēr″e-od) the period of time per day that an organism is exposed to daylight (or to artificial light).photoperiod´ic

photoperiod

(fō′tō-pîr′ē-əd)
n.
The daily duration of light and dark to which an organism is exposed, considered especially with regard to its effect on growth and development.

pho′to·pe′ri·od′ic (-ŏd′ĭk) adj.

photoperiod

the length of daylight as compared with the length of darkness in each 24 hour cycle. see PHOTOPERIODISM.

photoperiod

the period of time per day that an organism is exposed to daylight (or to artificial light).
References in periodicals archive ?
Egg mass incubation period: There was a significant difference in egg mass incubation period among the temperature and photoperiod conditions (A, B and C) (ANOVA: [F.
External cues, like temperature changes and changes to the food supply, become obvious when the photoperiod changes more drastically.
4], observed in trout and goldfish, indicate a correlation with feeding and photoperiod (REDDY; LEATHERLAND, 1994), and also with temperature (ROZIN; MAYER, 1961; CUENCA; GALLEGO, 1987; HIGUERA, 1987; SMITH, 1989).
Animals were taken directly from the field and tested under normal and reversed photoperiods, as well as in constant dark and light.
1]) under three photoperiods (24, 12, and 0 h of light).
05) cortisol release in ewes from both the SN and LN photoperiods starting from the first hour after treatment.
beani adaptation to the range of light intensities and photoperiods tested under culture conditions as did not show significant differences on growth or survival, similar to species such as Hippocampus whitei, O.
Leptin may play a regulation on body mass and energy metabolism by acting on hypothalamic neuropeptide of NPY expression under different photoperiods in E.
Chickens subjected to a short/non-intermittent photoperiod had the lowest body weight, body weight gain, feed intake, carcass weight, and fillet and tender weights when compared with those reared under long/continuous and regular/intermittent photoperiods.
Endogenous hormones play an important role in regulating the plant development and flowering process under varied photoperiods (Metzger, 1995).