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Author |
Viera-Perez, M.; Hernandez-Calvento, L.; Hesp, P.A.; Santana-Del Pino, A. |
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Title |
Effects of artificial light on flowering of foredune vegetation |
Type |
Journal Article |
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Year |
2019 |
Publication |
Ecology |
Abbreviated Journal |
Ecology |
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Volume |
100 |
Issue |
5 |
Pages |
e02678 |
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Keywords |
Plants; Coastal management; coastal dunes; Canary Islands; Spain; Europe |
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Abstract |
The impact of ecological light pollution involves alteration of periods of natural light, a fact that has proven effects on ecosystems. Few studies have focused on the impact of this pollution on wild plant species, and none on coastal dune plants. Many coastal dunes and their plants are adjacent to tourist areas, and these might be affected by light pollution. Such is the case of the Natural Reserve Dunas de Maspalomas (Gran Canaria), where some individuals of the plant species Traganum moquinii, located in the El Ingles beach foredune zone, are affected by light pollution. This study examines the effect of light pollution on the flowering process, and by extension the reproductive cycle of these plants. Plants located closer to high artificial illumination sources receive ~2120 hours per year of intense light more than plants located furthest from those artificial lighting sources. Parts of the plants of Traganum moquinii exposed directly to the artificial light show a significant decrease in the production of flowers, compared to the parts in plants in shade, and to the plants more distant from artificial lights. In consequence, plants exposed more directly to artificial light have a lower potential for seed reproduction. The spectrum of artificial light also affects the plants, and light between 600 and 700 nm primarily affects the reproductive cycle of the Traganum moquinii species. The implications for the ecological and geomorphological functioning of the dune system are discussed, because this species plays a decisive role in the formation of foredune zones and nebkhas in arid dune systems. |
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Address |
Departamento de Matematicas, Universidad de Las Palmas de Gran Canaria, 35017, Las Palmas de Gran Canaria, Spain |
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Publisher |
Ecological Society of America |
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Language |
English |
Summary Language |
English |
Original Title |
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ISSN |
0012-9658 |
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Notes |
PMID:30825328 |
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no |
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Call Number |
GFZ @ kyba @ |
Serial |
2244 |
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Author |
Shor, E.; Potavskaya, R.; Kurtz, A.; Paik, I.; Huq, E.; Green, R. |
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Title |
PIF-mediated sucrose regulation of the circadian oscillator is light quality and temperature dependent |
Type |
Journal Article |
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Year |
2018 |
Publication |
Genes |
Abbreviated Journal |
Genes (Basel) |
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Volume |
9 |
Issue |
12 |
Pages |
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Keywords |
Plants |
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Abstract |
Studies are increasingly showing that metabolic and circadian (~24 h) pathways are strongly interconnected, with the circadian system regulating the metabolic state of the cell, and metabolic products feeding back to entrain the oscillator. In plants, probably the most significant impact of the circadian system on metabolism is in its reciprocal regulation of photosynthesis; however, the pathways by which this occurs are still poorly understood. We have previously shown that members of the basic helix-loop-helix (bHLH) transcription factor PHYTOCHROME INTERACTING FACTOR (PIF) family are involved in the photosynthate entrainment of the circadian oscillator. In this paper, using Arabidopsis mutants and overexpression lines, we examine how temperature and light quality affect PIF-mediated sucrose signaling to the oscillator and examine the contributions of individual PIF members. Our results also show that the quality of light is important for PIF signaling, with red and blue lights having the opposite effects, and that temperature affects PIF-mediated sucrose signaling. We propose the light sensitivity of PIF-mediated sucrose entrainment of the oscillator may be important in enabling plants to distinguish between sucrose produced de novo from photosynthesis during the day and the sucrose products of starch degradation at the end of the night. |
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Address |
Department of Plant and Environmental Sciences, Institute for Life Sciences, Edmond J. Safra Campus, Givat Ram, Hebrew University, Jerusalem 91904, Israel. rgreen@mail.huji.ac.il |
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English |
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ISSN |
2073-4425 |
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Notes |
PMID:30551669; PMCID:PMC6316277 |
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no |
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Call Number |
GFZ @ kyba @ |
Serial |
2155 |
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Author |
Pattison, P.M.; Tsao, J.Y.; Brainard, G.C.; Bugbee, B. |
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Title |
LEDs for photons, physiology and food |
Type |
Journal Article |
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Year |
2018 |
Publication |
Nature |
Abbreviated Journal |
Nature |
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Volume |
563 |
Issue |
7732 |
Pages |
493-500 |
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Keywords |
Lighting; Human Health; Plants; Review |
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Abstract |
Lighting based on light-emitting diodes (LEDs) not only is more energy efficient than traditional lighting, but also enables improved performance and control. The colour, intensity and distribution of light can now be controlled with unprecedented precision, enabling light to be used both as a signal for specific physiological responses in humans and plants, and as an efficient fuel for fresh food production. Here we show how a broad and improved understanding of the physiological responses to light will facilitate greater energy savings and provide health and productivity benefits that have not previously been associated with lighting. |
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Address |
Utah State University, Logan, UT, USA |
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English |
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ISSN |
0028-0836 |
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Notes |
PMID:30464269 |
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no |
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Call Number |
GFZ @ kyba @ |
Serial |
2110 |
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Author |
Correa-Cano, M.E.; Goettsch, B.; Duffy, J.P.; Bennie, J.; Inger, R.; Gaston, K.J. |
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Title |
Erosion of natural darkness in the geographic ranges of cacti |
Type |
Journal Article |
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Year |
2018 |
Publication |
Scientific Reports |
Abbreviated Journal |
Sci Rep |
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Volume |
8 |
Issue |
1 |
Pages |
4347 |
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Keywords |
Plants; Remote Sensing |
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Abstract |
Naturally dark nighttime environments are being widely eroded by the introduction of artificial light at night (ALAN). The biological impacts vary with the intensity and spectrum of ALAN, but have been documented from molecules to ecosystems. How globally severe these impacts are likely to be depends in large part on the relationship between the spatio-temporal distribution of ALAN and that of the geographic ranges of species. Here, we determine this relationship for the Cactaceae family. Using maps of the geographic ranges of cacti and nighttime stable light composite images for the period 1992 to 2012, we found that a high percentage of cactus species were experiencing ALAN within their ranges in 1992, and that this percentage had increased by 2012. For almost all cactus species (89.7%) the percentage of their geographic range that was lit increased from 1992-1996 to 2008-2012, often markedly. There was a significant negative relationship between the species richness of an area, and that of threatened species, and the level of ALAN. Cacti could be particularly sensitive to this widespread and ongoing intrusion of ALAN into their geographic ranges, especially when considering the potential for additive and synergistic interactions with the impacts of other anthropogenic pressures. |
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Address |
Environment and Sustainability Institute, University of Exeter, Penryn, Cornwall, TR10 9FE, UK |
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English |
Summary Language |
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Series Editor |
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Abbreviated Series Title |
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Series Volume |
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Series Issue |
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Edition |
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ISSN |
2045-2322 |
ISBN |
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Conference |
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Notes |
PMID:29531261; PMCID:PMC5847551 |
Approved |
no |
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Call Number |
GFZ @ kyba @ |
Serial |
1824 |
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Author |
Bian, Z.; Yang, Q.; Li, T.; Cheng, R.; Barnett, Y.; Lu, C. |
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Title |
Study of the beneficial effects of green light on lettuce grown under short-term continuous red and blue light-emitting diodes |
Type |
Journal Article |
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Year |
2018 |
Publication |
Physiologia Plantarum |
Abbreviated Journal |
Physiol Plant |
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Volume |
164 |
Issue |
2 |
Pages |
226-240 |
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Keywords |
Plants |
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Abstract |
Red and blue light are the most important light spectra for driving photosynthesis to produce adequate crop yield. It is also believed that green light may contribute to adaptations to growth. However, the effects of green light, which can trigger specific and necessary responses of plant growth, have been underestimated in the past. In this study, lettuce (Lactuca sativa L.) was exposed to different continuous light (CL) conditions for 48 h by a combination of red and blue light-emitting diodes (LEDs) supplemented with or without green LEDs, in an environmental-controlled growth chamber. Green light supplementation enhanced photosynthetic capacity by increasing net photosynthetic rates (Pn ), maximal photochemical efficiency (Fv /Fm ), electron transport for carbon fixation (JPSII ) and chlorophyll content in plants under the CL treatment. Green light decreased malondialdehyde and H2 O2 accumulation by increasing the activities of superoxide dismutase (SOD; EC 1.15.1.1) and ascorbate peroxidase (APX; EC 1.11.1.11) after 24 h of CL. Supplemental green light significantly increased the expression of photosynthetic genes LHCb and PsbA from 6 to 12 h, and these gene expression were maintained at higher levels than those under other light conditions between 12 and 24 h. However, a notable down-regulation of both LHCb and PsbA was observed during 24 to 48 h. These results indicate that the effects of green light on lettuce plant growth, via enhancing activity of particular components of antioxidantive enzyme system and promoting of LHCb and PsbA expression to maintain higher photosynthetic capacity, alleviated a number of the negative effects caused by CL. |
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Address |
School of Animal, Rural and Environmental Science, Brackenhurst Campus, Nottingham Trent University, NG25 0QF, UK |
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English |
Summary Language |
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Original Title |
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Series Title |
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Abbreviated Series Title |
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Series Volume |
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Series Issue |
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Edition |
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ISSN |
0031-9317 |
ISBN |
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Notes |
PMID:29493775 |
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no |
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Call Number |
GFZ @ kyba @ |
Serial |
1905 |
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