Photoperiodic time measurement and seasonal immunological plasticity
نویسندگان
چکیده
منابع مشابه
Phenotypic evolution and the genetic architecture underlying photoperiodic time measurement
A wide variety of higher plants, vertebrates, and arthropods use the length of day to synchronize growth, development, reproduction, dormancy, and migration with the changing seasons. In the pitcher-plant mosquito, Wyeomyia smithii, critical photoperiod mediating the onset and maintenance of larval diapause has evolved about 10 standard deviations in mean critical photoperiod between the ancest...
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Most species living outside the tropical zone undergo physiological adaptations to seasonal environmental changes and changing day length (photoperiod); this phenomenon is called photoperiodism. It is well known that the circadian clock is involved in the regulation of photoperiodism such as seasonal reproduction, but the mechanism underlying circadian clock regulation of photoperiodism remains...
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Diapause (100% incidence) occurs in the moth Pectinophora gossypiella when it is exposed to 24-hour light/dark cycles involving 12 hours of red light (600 nm); only 2% occurs when the photoperiod is extended to 14 hours, again with 600-nm light. This wavelength fails to synchronize all the known circadian oscillations of the moth. These observations appear, therefore, to constitute positive evi...
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Puberty occurs seasonally in the majority of mammals native to temperate or arctic latitudes, and in species with sufficiently long life spans puberty can be considered to reoccur on an annual basis. The precise timing of puberty and the annual reoccurrence of fertility reflects an interaction of changes in ambient daylength (photoperiod) and endogenous long-term timing processes, which in some...
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A COMPETENT IMMUNE SYSTEM is crucial for maintaining a sufficiently high level of disease resistance. Immunity, however, is a double-edged sword. Impaired immunity increases susceptibility to pathogens and can increase the likelihood of sickness or death. Excessively heightened immune responses, in which our immune system fails to distinguish “self” from “non-self” or responds in excess to a be...
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ژورنال
عنوان ژورنال: Frontiers in Neuroendocrinology
سال: 2015
ISSN: 0091-3022
DOI: 10.1016/j.yfrne.2014.10.002