| Records |
| Author |
Tewolde, F.T.; Lu, N.; Shiina, K.; Maruo, T.; Takagaki, M.; Kozai, T.; Yamori, W. |
| Title |
Nighttime Supplemental LED Inter-lighting Improves Growth and Yield of Single-Truss Tomatoes by Enhancing Photosynthesis in Both Winter and Summer |
Type |
Journal Article |
| Year |
2016 |
Publication |
Frontiers in Plant Science |
Abbreviated Journal |
Front Plant Sci |
Volume  |
7 |
Issue |
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Pages |
448 |
| Keywords |
Plants; LED; fruit quality; lighting period; photosynthesis; plant factory; single-truss tomato; supplemental lighting; yield |
| Abstract |
Greenhouses with sophisticated environmental control systems, or so-called plant factories with solar light, enable growers to achieve high yields of produce with desirable qualities. In a greenhouse crop with high planting density, low photosynthetic photon flux density (PPFD) at the lower leaves tends to limit plant growth, especially in the winter when the solar altitude and PPFD at the canopy are low and day length is shorter than in summer. Therefore, providing supplemental lighting to the lower canopy can increase year-round productivity. However, supplemental lighting can be expensive. In some places, the cost of electricity is lower at night, but the effect of using supplemental light at night has not yet been examined. In this study, we examined the effects of supplemental LED inter-lighting (LED inter-lighting hereafter) during the daytime or nighttime on photosynthesis, growth, and yield of single-truss tomato plants both in winter and summer. We used LED inter-lighting modules with combined red and blue light to illuminate lower leaves right after the first anthesis. The PPFD of this light was 165 mumol m(-2) s(-1) measured at 10 cm from the LED module. LED inter-lighting was provided from 4:00 am to 4:00 pm for the daytime treatments and from 10:00 pm to 10:00 am for the nighttime treatments. Plants exposed only to solar light were used as controls. Daytime LED inter-lighting increased the photosynthetic capacity of middle and lower canopy leaves, which significantly increased yield by 27% in winter; however, photosynthetic capacity and yield were not significantly increased during summer. Nighttime LED inter-lighting increased photosynthetic capacity in both winter and summer, and yield increased by 24% in winter and 12% in summer. In addition, nighttime LED inter-lighting in winter significantly increased the total soluble solids and ascorbic acid content of the tomato fruits, by 20 and 25%, respectively. Use of nighttime LED inter-lighting was also more cost-effective than daytime inter-lighting. Thus, nighttime LED inter-lighting can effectively improve tomato plant growth and yield with lower energy cost compared with daytime both in summer and winter. |
| Address |
Center for Environment, Health and Field Sciences, Chiba University, Kashiwa, Japan; Department of Biological Sciences, Faculty of Science, The University of Tokyo, Japan |
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Thesis |
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| Publisher |
Frontiers Media S.A. |
Place of Publication |
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Editor |
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| Language |
English |
Summary Language |
English |
Original Title |
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| Series Editor |
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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 |
1664-462X |
ISBN |
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| Notes |
PMID:27092163; PMCID:PMC4823311 |
Approved |
no |
| Call Number |
IDA @ john @ |
Serial |
1434 |
| Permanent link to this record |
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| Author |
Raven, J.A.; Cockell, C.S. |
| Title |
Influence on photosynthesis of starlight, moonlight, planetlight, and light pollution (reflections on photosynthetically active radiation in the universe) |
Type |
Journal Article |
| Year |
2006 |
Publication |
Astrobiology |
Abbreviated Journal |
Astrobiology |
| Volume |
6 |
Issue |
4 |
Pages |
668-675 |
| Keywords |
Plants |
| Abstract |
Photosynthesis on Earth can occur in a diversity of organisms in the photosynthetically active radiation (PAR) range of 10 nmol of photons m(-2) s(-1) to 8 mmol of photons m(-2) s(-1). Similar considerations would probably apply to photosynthetic organisms on Earth-like planets (ELPs) in the continuously habitable zone of other stars. On Earth, starlight PAR is inadequate for photosynthetically supported growth. An increase in starlight even to reach the minimum theoretical levels to allow for photosynthesis would require a universe that was approximately ten million times older, or with a ten million times greater density of stars, than is the case for the present universe. Photosynthesis on an ELP using PAR reflected from a natural satellite with the same size as our Moon, but at the Roche limit, could support a low rate of photosynthesis at full Moon. Photosynthesis on an ELP-like satellite of a Jupiter-sized planet using light reflected from the planet could be almost 1% of the rate in full sunlight on Earth when the planet was full. These potential contributions to photosynthesis require that the contribution is compared with the rate of photosynthesis driven by direct radiation from the star. Light pollution on Earth only energizes photosynthesis by organisms that are very close to the light source. However, effects of light pollution on photosynthesis can be more widespread if the photosynthetic canopy is retained for more of the year, caused by effects on photoperiodism, with implications for the influence of civilizations on photosynthesis. |
| Address |
Plant Research Unit, University of Dundee at SCRI, Scottish Crop Research Institute, Invergowrie, Dundee, United Kingdom |
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Thesis |
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Place of Publication |
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| Language |
English |
Summary Language |
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Original Title |
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| Series Editor |
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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 |
1557-8070 |
ISBN |
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Medium |
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| Area |
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Expedition |
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Conference |
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| Notes |
PMID:16916290 |
Approved |
no |
| Call Number |
LoNNe @ christopher.kyba @ |
Serial |
1198 |
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| Author |
Sanders, D.; Kehoe, R.; Tiley, K.; Bennie, J.; Cruse, D.; Davies, T.W.; Frank van Veen, F.J.; Gaston, K.J. |
| Title |
Artificial nighttime light changes aphid-parasitoid population dynamics |
Type |
Journal Article |
| Year |
2015 |
Publication |
Scientific Reports |
Abbreviated Journal |
Sci Rep |
| Volume |
5 |
Issue |
|
Pages |
15232 |
| Keywords |
Ecology; animals; plants |
| Abstract |
Artificial light at night (ALAN) is recognized as a widespread and increasingly important anthropogenic environmental pressure on wild species and their interactions. Understanding of how these impacts translate into changes in population dynamics of communities with multiple trophic levels is, however, severely lacking. In an outdoor mesocosm experiment we tested the effect of ALAN on the population dynamics of a plant-aphid-parasitoid community with one plant species, three aphid species and their specialist parasitoids. The light treatment reduced the abundance of two aphid species by 20% over five generations, most likely as a consequence of bottom-up effects, with reductions in bean plant biomass being observed. For the aphid Megoura viciae this effect was reversed under autumn conditions with the light treatment promoting continuous reproduction through asexuals. All three parasitoid species were negatively affected by the light treatment, through reduced host numbers and we discuss induced possible behavioural changes. These results suggest that, in addition to direct impacts on species behaviour, the impacts of ALAN can cascade through food webs with potentially far reaching effects on the wider ecosystem. |
| Address |
Environment &Sustainability Institute, University of Exeter, Cornwall Campus Penryn, Cornwall, TR10 9EZ, United Kingdom |
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Thesis |
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Place of Publication |
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| Language |
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 |
2045-2322 |
ISBN |
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Medium |
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| Area |
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Expedition |
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Conference |
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| Notes |
PMID:26472251; PMCID:PMC4607942 |
Approved |
no |
| Call Number |
LoNNe @ kyba @ |
Serial |
1290 |
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| Author |
Cathey, H. M., & Campbell, L. E. |
| Title |
Security lighting and its impact on the landscape. |
Type |
Journal Article |
| Year |
1975 |
Publication |
Journal Of Arboriculture |
Abbreviated Journal |
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| Volume |
1 |
Issue |
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Pages |
181–187 |
| Keywords |
Plants |
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| Notes |
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Approved |
no |
| Call Number |
LoNNe @ kagoburian @ |
Serial |
653 |
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| Author |
Moore, B. |
| Title |
The Relative Length of Day and Night |
Type |
Journal Article |
| Year |
1920 |
Publication |
Ecology |
Abbreviated Journal |
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| Volume |
1 |
Issue |
3 |
Pages |
234-237 |
| Keywords |
Plants |
| Abstract |
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Series Title |
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Series Issue |
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Edition |
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| ISSN |
0012-9658 |
ISBN |
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| Notes |
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Approved |
no |
| Call Number |
GFZ @ kyba @ |
Serial |
2407 |
| Permanent link to this record |
