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Reinberg, A.; Smolensky, M.H.; Touitou, Y. |
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Title |
The full moon as a synchronizer of circa-monthly biological rhythms: Chronobiologic perspectives based on multidisciplinary naturalistic research |
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Journal Article |
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Year |
2016 |
Publication |
Chronobiology International |
Abbreviated Journal |
Chronobiol Int |
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33 |
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5 |
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465-479 |
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Keywords |
Moonlight; Commentary; Animals; Plants; Human Health |
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Abstract |
Biological rhythmicity is presumed to be an advantageous genetic adaptation of fitness and survival value resulting from evolution of life forms in an environment that varies predictably-in-time during the 24 h, month, and year. The 24 h light/dark cycle is the prime synchronizer of circadian periodicities, and its modulation over the course of the year, in terms of daytime photoperiod length, is a prime synchronizer of circannual periodicities. Circadian and circannual rhythms have been the major research focus of most scientists. Circa-monthly rhythms triggered or synchronized by the 29.5 day lunar cycle of nighttime light intensity, or specifically the light of the full moon, although explored in waterborne and certain other species, have received far less study, perhaps because of associations with ancient mythology and/or an attitude naturalistic studies are of lesser merit than ones that entail molecular mechanisms. In this editorial, we cite our recent discovery through multidisciplinary naturalistic investigation of a highly integrated circadian, circa-monthly, and circannual time structure, synchronized by the natural ambient nyctohemeral, lunar, and annual light cycles, of the Peruvian apple cactus (C. peruvianus) flowering and reproductive processes that occur in close temporal coordination with like rhythms of the honey bee as its pollinator. This finding led us to explore the preservation of this integrated biological time structure, synchronized and/or triggered by environmental light cues and cycles, in the reproduction of other species, including Homo sapiens, and how the artificial light environment of today in which humans reside may be negatively affecting human reproduction efficiency. |
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a Unite de Chronobiologie , Fondation A de Rothschild , Paris cedex 19 , France |
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0742-0528 |
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PMID:27019304 |
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LoNNe @ kyba @ |
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1460 |
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Tinus, R. W. |
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Title |
Effects of Extended Photoperiod on Southern Rocky Mountain Engelmann Spruce and Douglas-fir |
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Journal Article |
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1981 |
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Tree Planters' Notes |
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32 |
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4 |
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Plants |
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Four sources of Engelmann spruce and two of Douglas-fir were grown under eight different extended photoperiod regimes. Incandescent light 1 minute of every 15 at night at 270 lux was more effective than continuous incandescent at 1200 lux or intermittent fluorescent at 950 lux at preventing bud dormancy and maintaining continuous height growth. |
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IDA @ intern @ |
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2368 |
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Brelsford, CC; Robson, TM |
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Title |
Blue light advances bud burst in branches of three deciduous tree species under short-day conditions |
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Journal Article |
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2018 |
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Trees |
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32 |
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4 |
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1157-1164 |
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Plants |
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During spring, utilising multiple cues allow tree species from temperate and boreal regions to coordinate their bud burst and leaf out, at the right moment to capitalise on favourable conditions for photosynthesis. Whilst the effect of blue light (400–500 nm) has been shown to increase percentage bud burst of axillary shoots of Rosa sp., the effects of blue light on spring-time bud burst of deciduous tree species have not previously been reported. We tested the hypotheses that blue light would advance spring bud burst in tree species, and that late-successional species would respond more than early-successional species, whose bud burst is primarily determined by temperature. The bud development of Alnus glutinosa, Betula pendula, and Quercus robur branches, cut from dormant trees, was monitored under two light treatments of equal photosynthetically active radiation (PAR, 400–700 nm) and temperature, either with or without blue light, under controlled environmental conditions. In the presence of blue light, the mean time required to reach 50% bud burst was reduced by 3.3 days in Betula pendula, 6 days in Alnus glutinosa, and 6.3 days in Quercus robur. This result highlights the potential of the blue region of the solar spectrum to be used as an extra cue that could help plants to regulate their spring phenology, alongside photoperiod and temperature. Understanding how plants combine photoreceptor-mediated cues with other environmental cues such as temperature to control phenology is essential if we are to accurately predict how tree species might respond to climate change. |
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GFZ @ kyba @ |
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1847 |
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Margot, J.-L. |
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Title |
Insufficient Evidence of Purported Lunar Effect on Pollination in Ephedra |
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Journal Article |
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2015 |
Publication |
Journal of Biological Rhythms |
Abbreviated Journal |
J Biol Rhythms |
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30 |
Issue |
5 |
Pages |
454-456 |
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Keywords |
Animals; Plants; Moonlight |
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It has been suggested that the timing of pollination in Ephedra foeminea coincides with the full moon in July. The implication is that the plant can detect the full moon through light or gravity and that this trait is an evolutionary adaptation that aids the navigation by pollinating insects. Here we show that there are insufficient data to make such a claim, and we predict that pollinations of E. foeminea do not in general coincide with the full moon. |
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Department of Earth, Planetary, and Space Sciences, University of California, Los Angeles, California, USADepartment of Physics and Astronomy, University of California, Los Angeles, California, USA jlm@astro.ucla.edu |
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0748-7304 |
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PMID:26316347 |
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LoNNe @ kyba @ |
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1557 |
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Author |
Siemens, C.W. |
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Title |
III. On the influence of electric light upon vegetation, and on certain physical principles involved |
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Journal Article |
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Year |
1880 |
Publication |
Proceedings of the Royal Society of London |
Abbreviated Journal |
Abstr. Pap. Printed Phil. Trans. R. Soc. Lond. |
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30 |
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200-205 |
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210-219 |
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0370-1662 |
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GFZ @ kyba @ |
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2376 |
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