Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun The daily duration of light and dark to which an organism is exposed, considered especially with regard to its effect on growth and development.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun biology The normal
duration of naturaldaylight experienced by anorganism ;daylength
Etymologies
Sorry, no etymologies found.
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Examples
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The changing of day length in spring and fall triggers bird migration because "photoperiod" is the only absolutely reliable environmental cue that signals birds that it's
WN.com - Articles related to This Diwali, books and plants replace sweets 2009
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Taken together, our findings suggest that optimization of experimental conditions such as photoperiod may be necessary to visualize FAA in genetically modified mice.
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I know rut is driving by photoperiod, but what about the effect of a really warm snap?
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I know rut is driving by photoperiod, but what about the effect of a really warm snap?
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"The photoperiod transducer melatonin and the immune-hematopoietic system".
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Reindeer, like several other species of deer, show a pronounced seasonal cycle in appetite and growth which appears to follow an intrinsic rhythm entrained by photoperiod and associated with changes in levels of circulating hormones.
Climate change and reindeer nomadism in Finnmark, Norway 2010
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"The photoperiod transducer melatonin and the immune-hematopoietic system".
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The photoperiod transducer melatonin and the immune-hematopoietic system.
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Heat energy requirements for plants interact with other environmental factors, such as moisture stress and photoperiod [15], and thus GDDs may not be a good predictor of plant development under stress.
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Heat requirements for plant development generally decrease with increasing photoperiod, so fewer GDDs are needed to reach a given growth stage at high latitudes than at low latitudes.
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