Photoperiodism. The biological calendar
نویسندگان
چکیده
منابع مشابه
Predictors of the discrepancy between calendar and biological age.
BACKGROUND The rate of ageing can differ considerably between individuals. This might result in major differences between calendar age (CA) and biological age (BA). AIMS To identify work- and health-related predictors of the discrepancy between CA and BA. METHODS The sample analysed in this study consisted of 371 subjects of different occupational groups (teachers, office workers, nursery s...
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I n mammals, photoreception is restricted to the eye. By contrast, nonmammalian vertebrates possess photoreceptors in a wide array of extraocular tissues, including the pineal complex and brain (1). The identity of the deep brain photoreceptors has remained elusive. They continue to be the least studied of all nonvisual photoreceptor classes, although their existence in the vertebrates has been...
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Andersson, H. 2000. Photoperiodism in pigs. Studies on timing of male puberty and melatonin. Doctoral thesis ISSN 1401-6257, ISBN 91-576-5901-X. The routine castration of male piglets, which is performed in many countries to avoid boar taint in meat, is a cause for great concern in terms of animal welfare. Castrates also have reduced feed efficiency and more fat than do entire males. More of th...
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Many plants use the seasonal change in daylength as a signal for flowering. Daylength sensing in Arabidopsis has now been shown to occur by an external coincidence mechanism, which operates by the circadian and light regulation of CONSTANS.
متن کاملThe Calendar Native Speaker
to the 2000-2001 academic year! I am pleased to announce that we have finally organized a Web site for the Labs. Please check it out. The URL is: http://humanities.uchicago.edu/lla. We are interested in your comments, criticisms and suggestions. A Web site is always a work in progress, but that is especially the case for ours this year. Our primary goal is to create a site that is useful for th...
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ژورنال
عنوان ژورنال: Annals of Botany
سال: 2011
ISSN: 1095-8290,0305-7364
DOI: 10.1093/aob/mcr215