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Kwak, M.J.; Lee, S.H.; Khaine, I.; Je, S.M.; Lee, T.Y.; You, H.N.; Lee, H.K.; Jang, J.H.; Kim, I.; Woo, S.Y. |
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Title |
Stomatal movements depend on interactions between external night light cue and internal signals activated by rhythmic starch turnover and abscisic acid (ABA) levels at dawn and dusk |
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Journal Article |
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Year |
2017 |
Publication  |
Acta Physiologiae Plantarum |
Abbreviated Journal |
Acta Physiol Plant |
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39 |
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8 |
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Plants |
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Abstract |
Yellow poplar (Liriodendron tulipifera L.) is a widespread hardwood tree of great ecological and economic value. Light pollution caused by excessive and indiscriminate exposure to artificial night light has emerged as a new risk factor due to its adverse effects related to energy waste, sleep disorders, anthropogenic habitat disturbance, and perceptual disorder of daily and seasonal rhythms in wildlife. However, it remains unknown how associations between artificial night light and stomatal behaviors controlled by internal signals are established. After continuous exposure to artificial light at night over 3 years, leaves in the experimental set-up were measured for stomatal movements, starch turnover, endogenous abscisic acid (ABA) levels, and chloroplast ultrastructure during the growing season. Yellow poplar showed dynamic changes in stomatal movement, starch turnover, and endogenous ABA levels in response to day/artificial night light cycle, resulting in reduction of circadian phase-shifting capacity at both dusk and dawn and normal chloroplast development as compared with natural night. Nighttime light exposure may act as a major factor for disorder of circadian and circannual rhythms as well as physiological and ultrastructural repressor in plants, via a modification of the perceived photoperiod. Our study suggests that these dynamic responses can provide advantageous insights that complement the current knowledge on light pollution. |
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0137-5881 |
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1682 |
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Mayoral, O.; Solbes, J.; Cantó, J.; Pina, T. |
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Title |
What Has Been Thought and Taught on the Lunar Influence on Plants in Agriculture? Perspective from Physics and Biology |
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Journal Article |
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Year |
2020 |
Publication |
Agronomy |
Abbreviated Journal |
Agronomy |
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10 |
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7 |
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955 |
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Moonlight; Plants |
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This paper reviews the beliefs which drive some agricultural sectors to consider the lunar influence as either a stress or a beneficial factor when it comes to organizing their tasks. To address the link between lunar phases and agriculture from a scientific perspective, we conducted a review of textbooks and monographs used to teach agronomy, botany, horticulture and plant physiology; we also consider the physics that address the effects of the Moon on our planet. Finally, we review the scientific literature on plant development, specifically searching for any direct or indirect reference to the influence of the Moon on plant physiology. We found that there is no reliable, science-based evidence for any relationship between lunar phases and plant physiology in any plant–science related textbooks or peer-reviewed journal articles justifying agricultural practices conditioned by the Moon. Nor does evidence from the field of physics support a causal relationship between lunar forces and plant responses. Therefore, popular agricultural practices that are tied to lunar phases have no scientific backing. We strongly encourage teachers involved in plant sciences education to objectively address pseudo-scientific ideas and promote critical thinking. |
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2073-4395 |
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3036 |
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Matzke, E. B. |
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Title |
The Effect of Street Lights in Delaying Leaf-Fall in Certain Trees |
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Journal Article |
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1936 |
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American Journal of Botany |
Abbreviated Journal |
Amer. J. of Botany |
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23 |
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6 |
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446-452 |
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Plants; trees; Carolina poplar; Populus canadensis; London plane; Platanus acerifolia; sycamore; Platanus occidentalis; crack willow; Salix fragilis; New York; New York City |
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Street lights in the City of New York cause a retention of the leaves of certain trees: Carolina poplar (Populus canadensis), London plane (Platanus acerifolia), sycamore (Platanus occidentalis), and crack willow (Salix fragilis). Illuminated portions of a tree retain their leaves; shaded portions of the same tree do not. One side of a tree, or the lower part, may thus have numerous leaves, while the other side, and the upper part, may be entirely devoid of foliage. A relatively weak light, at a distance of as much as 45 feet from the tip of the nearest branch, may cause retention of numerous leaves. Light intensity as low as 1 foot candle, or less, may be effective. Some leaves may be retained at least a month, others more than that, beyond the normal season. The orientation of the light with respect to the tree – i.e., north, east, south, and west – is not significant. In Populus canadensis all of the leaves ultimately fall, abscission apparently taking place at the base of the petiole. In Platanus acerifolia and Platanus occidentalis some of the leaves are retained until killed by low temperature; then some of them break off above the base of the petiole. Leaves of the Populus and Platanus species discussed remain green unusually long when receiving additional illumination. Leaves of these same trees do not emerge from the buds earlier in the spring as a result of the additional illumination. |
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0002-9122 |
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IDA @ john @ |
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1394 |
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Author |
Adams, J. |
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Title |
Some Further Experiments On The Relation Of Light To Growth |
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1925 |
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American Journal of Botany |
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American Journal of Botany |
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12 |
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7 |
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398-412 |
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GFZ @ kyba @ |
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2393 |
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Vänninen, I.; Pinto, D.M.; Nissinen, A.I.; Johansen, N.S.; Shipp, L. |
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Title |
In the light of new greenhouse technologies: 1. Plant-mediated effects of artificial lighting on arthropods and tritrophic interactions |
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Journal Article |
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Year |
2010 |
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Annals of Applied Biology |
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157 |
Issue |
3 |
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393-414 |
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Plants |
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0003-4746 |
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LoNNe @ kagoburian @ |
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658 |
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