Results 281 to 290 of about 58,693 (334)

Photoperiodism in Neurospora Crassa

Journal of Biological Rhythms, 2004
Plants and animals use day or night length for seasonal control of reproduction and other biological functions. Overwhelming evidence suggests that this photoperiodic mechanism relies on a functional circadian system. Recent progress has defined how flowering time in plants is regulated by photoperiodic control of output pathways, but the underlying ...
Ying Tan, Martha Merrow, Till Roenneberg
openaire   +4 more sources

Involvement of the Clock Gene Period in the Photoperiodism of the Silkmoth Bombyx mori

Zoological Science, 2021
We established a knockout strain of a clock gene, period (per), by using TALEN in a bivoltine strain (Kosetsu) of Bombyx mori (Insecta, Lepidoptera), and examined the effect of per knockout on the circadian rhythm and photoperiodism.
Kento Ikeda, T. Daimon, K. Shiomi, Hiroko Udaka, H. Numata   +4 more
semanticscholar   +1 more source

Photoperiodism in Jute

Nature, 1946
JUTE is one of the most important fibre crops of Bengal, and two species—Corchorus capsularis L. and C. olitorius L.—are under cultivation. They are generally sown between March and May and harvested during September–October.
J. C. Sen Gupta, Nirad Kumar Sen
openaire   +3 more sources

Photorefractoriness in birds—photoperiodic and non-photoperiodic control

General and Comparative Endocrinology, 2007
Avian breeding seasons vary in length and in the degree of asymmetry with respect to the annual cycle in photoperiod to suit species-specific food resources. Asymmetry is the result of photorefractoriness. The degree of photorefractoriness, absolute or relative, is related to the length and asymmetry of the breeding season. Absolute photorefractoriness
Dawson, Alistair, Sharp, Peter, J.
openaire   +4 more sources

The consequences of photoperiodism for organisms in new climates.

Ecological Applications, 2015
A change in climate is known to affect seasonal timing (phenology) of the life stages of poikilothermic organisms whose development depends on temperature.
F. Grevstad, L. Coop
semanticscholar   +1 more source

Evolution of Animal Photoperiodism

, 2007
Photoperiodism is the ability of organisms to assess and use the day length as an anticipatory cue to time seasonal events in their life histories. Photoperiodism is especially important in initiating physiological and developmental processes that are ...
W. Bradshaw, C. Holzapfel
semanticscholar   +1 more source

Photoperiodism in birds.

Ciba Foundation symposium, 1985
Birds show a circadian rhythm in melatonin secretion and, as expected, the pattern of output changes with photoperiod. Somewhat surprisingly then, in view of the mechanisms in mammals, birds do not seem to use this seasonal message in the photoperiodic control of reproduction.
Russell G. Foster, Brian K. Follett, T J Nicholls   +2 more
openaire   +3 more sources

Are Humans Seasonally Photoperiodic?

Journal of Biological Rhythms, 2004
Humans exhibit seasonal variation in a wide variety of behavioral and physiological processes, and numerous investigators have suggested that this might be because we are sensitive to seasonal variation in day length. The evidence supporting this hypothesis is inconsistent. A new hypothesis is offered here—namely, that some humans indeed are seasonally
openaire   +3 more sources

Photoperiodism and effects of indoleamines in a unicellular alga, Gonyaulax polyedra.

Science, 1991
Mediation of photoperiodic effects by indoleamines, especially melatonin, is known in higher vertebrates. A similar mechanism may occur in a unicellular alga, the dinoflagellate Gonyaulax polyedra.
I. Balzer, R. Hardeland
semanticscholar   +1 more source