| Records |
| Author |
Ebisawa, M.; Shoji, K.; Kato, M.; Shimomura, K.; Goto, F.; Yoshihara, T. |
| Title |
Supplementary Ultraviolet Radiation B Together with Blue Light at Night Increased Quercetin Content and Flavonol Synthase Gene Expression in Leaf Lettuce (Lactuca sativa L.) |
Type |
Journal Article |
| Year |
2008 |
Publication |
Environment Control in Biology |
Abbreviated Journal |
Environ. Control Biol. |
| Volume |
46 |
Issue |
1 |
Pages  |
1-11 |
| Keywords |
Plants |
| Abstract |
Establishment of an effective supplementary lighting procedure is necessary to increase the value of leaf lettuce grown using a hydroponic method involving a low production cost. In leaf lettuce extracts, quercetin, one of the flavonoids, was isolated and identified. It was investigated that quercetin has important functions that can be used as a dietary supplement. Flavonol synthase (FLS) is a key enzyme involved in quercetin biosynthesis, catalyzes the conversion of dihydroquercetin to quercetin. Therefore, we determined the sequence of the flavonol synthase gene (FLS) in red leaf lettuce. We harvested leaf lettuce grown using supplementary light sources, such as ultraviolet radiation B (UV-B), ultraviolet radiation A, blue, and red lamps during the night. It is noteworthy that FLS expression and the quercetin content were particularly increased to a greater extent in young leaves than in mature leaves when UV-B and blue light were used simultaneously at night. We suggest that UV-B with blue light is used simultaneously at night for producing leaf lettuce with high quercetin content. |
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| ISSN |
1880-554X |
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| Call Number |
GFZ @ kyba @ |
Serial |
2799 |
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| Author |
Tinus, R. W. |
| Title |
Effects of Extended Photoperiod on Southern Rocky Mountain Engelmann Spruce and Douglas-fir |
Type |
Journal Article |
| Year |
1981 |
Publication |
Tree Planters' Notes |
Abbreviated Journal |
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| Volume |
32 |
Issue |
4 |
Pages |
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| Keywords |
Plants |
| Abstract |
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 @ |
Serial |
2368 |
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| Author |
Chen, C. L.; Su, Y. H.; Liu, C.J.; Lee, Y.C. |
| Title |
Effect of Night Illumination on Growth and Yield of Soybean |
Type |
Journal Article |
| Year |
2009 |
Publication |
Journal of Taiwan Agricultural Research |
Abbreviated Journal |
J. of Taiwan Agricultural Res. |
| Volume |
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Issue |
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| Keywords |
Plants; soybeans; Taiwan |
| Abstract |
To evaluate the potential of soybean as a crop for bio-fuel in Taiwan, field experiments were conducted in 2006 across the island, using an Australian variety ‘Leichardt’. This study was one of the field experiments at Hemei Township, Changhua County. Soybean was seeded by hand-spreading in the fall of 2006 and harvested in 2007. Results showed that seeding of soybean by hand-spreading affected uniformity of seed germination and caused high variations in yield in this field. Seed yield of soybean reached 770 kg ha-1 under good pest management and disease control. The study also showed that night illumination is an important factor affecting growth and yield of soybean. Plants growing near the roadside (within 10–20 m) were exposed to the night light, resulting in prolonged vegetative growth and delayed blossom period for about 1 to 4 weeks. Therefore, such plants suffered from poor pod filling due to low temperature stress at reproduction stage and delayed the harvest period for about 6 weeks. Nevertheless, seed yield of soybean plants exposed to the night illumination reached 1000 kg ha-1, which was slightly higher than soybean plants without exposuring to the night illumination. |
| Address |
chiling(at)tari.gov.tw |
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Taiwan Agricultural Research Institute |
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| Language |
Chinese |
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English |
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IDA @ john @ |
Serial |
1395 |
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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. |
| 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 |
| Year |
2017 |
Publication |
Acta Physiologiae Plantarum |
Abbreviated Journal |
Acta Physiol Plant |
| Volume |
39 |
Issue |
8 |
Pages |
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| Keywords |
Plants |
| 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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no |
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LoNNe @ kyba @ |
Serial |
1682 |
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Skvareninová, J.; Tuhárska, M.; Skvarenina, J.; Babálová, D.; Slobodníková, L.; Slobodník, B.; Stredová, H.; Mindas, J. |
| Title |
Effects of light pollution on tree phenology in the urban environment |
Type |
Journal Article |
| Year |
2017 |
Publication |
Moravian Geographical Reports |
Abbreviated Journal |
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| Volume |
25 |
Issue |
4 |
Pages |
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| Keywords |
Plants |
| Abstract |
Research on urban climates has been an important topic in recent years, given the growing number of city inhabitants and significant influences of climate on health. Nevertheless, far less research has focused on the impacts of light pollution, not only on humans, but also on plants and animals in the landscape. This paper reports a study measuring the intensity of light pollution and its impact on the autumn phenological phases of tree species in the town of Zvolen (Slovakia). The research was carried out at two housing estates and in the central part of the town in the period 2013–2016. The intensity of ambient nocturnal light at 18 measurement points was greater under cloudy weather than in clear weather conditions. Comparison with the ecological standard for Slovakia showed that average night light values in the town centre and in the housing estate with an older type of public lighting, exceeded the threshold value by 5 lux. Two tree species, sycamore maple (Acer pseudoplatanus L.) and staghorn sumac (Rhus typhina L.), demonstrated sensitivity to light pollution. The average onset of the autumn phenophases in the crown parts situated next to the light sources was delayed by 13 to 22 days, and their duration was prolonged by 6 to 9 days. There are three major results: (i) the effects of light pollution on organisms in the urban environment are documented; (ii) the results provide support for a theoretical and practical basis for better urban planning policies to mitigate light pollution effects on organisms; and (iii) some limits of the use of plant phenology as a bioindicator of climate change are presented. |
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1210-8812 |
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no |
| Call Number |
LoNNe @ kyba @ |
Serial |
1799 |
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