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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 |
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Journal Article |
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Year |
2018 |
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Genes |
Abbreviated Journal |
Genes (Basel) |
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Volume |
9 |
Issue |
12 |
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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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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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2073-4425 |
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PMID:30551669; PMCID:PMC6316277 |
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GFZ @ kyba @ |
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2155 |
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Author |
Shlayan, N.; Challapali, K.; Cavalcanti, D.; Oliveira, T.; Yang, Y. |
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Title |
A Novel Illuminance Control Strategy for Roadway Lighting Based on Greenshields Macroscopic Traffic Model |
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Journal Article |
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Year |
2018 |
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IEEE Photonics Journal |
Abbreviated Journal |
IEEE Photonics J. |
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10 |
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1 |
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1-11 |
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Keywords |
Lighting; Planning; Economics |
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Abstract |
Most street lights currently deployed have constant illumination levels or vary
based on a predetermined schedule. However, with advances in lighting controls, intelligent transportation systems, and the efforts of transportation agencies at regional and national levels to better sustain and manage the transportation system by monitoring the roadway network, many different types of real-time traffic data are available; which enables the implementation of a traffic responsive outdoor light system. The International Commission on Illumination (CIE) has proposed a class-based lighting control model based on a number of roadway parameters, some of which are traffic related. However, the adaptation of the available traffic data to the existing model is not obvious. In addition, the CIE model can be improved to better reflect traffic characteristics to increase energy efficiency of the overall street lighting system. The intention of this research is to quantify the relationship between real-time traffic, and roadway lighting and to develop a control strategy based on real-time traffic data in order to reduce light energy consumption, enhance safety, and maximize throughput of the roadway. Significant energy savings were observed when the proposed control strategy was implemented in two case studies using available lighting and traffic data for Washington, DC, and Montgomery County, MD, representing urban and rural roadway networks, respectively. |
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1943-0655 |
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GFZ @ kyba @ |
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1850 |
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Shima, J.S.; Swearer, S.E. |
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Title |
Moonlight enhances growth in larval fish |
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Journal Article |
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2018 |
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Ecology |
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Ecology |
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in press |
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Keywords |
Animals; Moonlight |
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Moonlight mediates trophic interactions and shapes the evolution of life-history strategies for nocturnal organisms. Reproductive cycles and important life-history transitions for many marine organisms coincide with moon phases, but few studies consider the effects of moonlight on pelagic larvae at sea. We evaluated effects of moonlight on growth of pelagic larvae of a temperate reef fish using 'master chronologies' of larval growth constructed from age-independent daily increment widths recorded in otoliths of 321 individuals. We found that daily growth rates of fish larvae were enhanced by lunar illumination after controlling for the positive influence of temperature and the negative influence of cloud cover. Collectively, these results indicate that moonlight enhances growth rates of larval fish. This pattern is likely the result of moonlight's combined effects on foraging efficiency and suppression of diel migrations of mesopelagic predators, and has the potential to drive evolution of marine life histories. This article is protected by copyright. All rights reserved. |
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School of BioSciences, University of Melbourne, Melbourne, 3010, Australia |
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0012-9658 |
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PMID:30422325 |
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Call Number |
GFZ @ kyba @ |
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2059 |
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Author |
Shi, K.; Yu, B.; Huang, C.; Wu, J.; Sun, X. |
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Title |
Exploring spatiotemporal patterns of electric power consumption in countries along the Belt and Road |
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Journal Article |
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Year |
2018 |
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Energy |
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Energy |
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150 |
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847-859 |
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Remote Sensing |
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Fully understanding spatiotemporal patterns of electric power consumption (EPC) is one of the key questions related to sustainable socioeconomic and environmental development in countries along the Silk Road Economic Belt and the 21st-Century Maritime Silk Road (hereinafter referred to as the Belt and Road countries). However, studies about spatiotemporal patterns of EPC in the Belt and Road countries are still scarce due to the lack of reliable data. This study attempted to investigate spatiotemporal patterns of EPC in the Belt and Road countries from multiple perspectives. Firstly, the Defense Meteorological Satellite Program’s Operational Linescan System (DMSP-OLS) nighttime stable light data were used to estimate EPC from 1992 to 2013. Subsequently, the mathematical statistic method, standard deviational ellipse, rank size rule, and correlation analysis were employed to evaluate the EPC change in detail. The results reveal that the EPC growth mainly occurs in the developing countries, especially in China. The geographical distribution of EPC in the Belt and Road countries is oriented in the Northwest-Southeast direction between 1992 and 2013. Based on the rank size rule analysis, the slope values of q are −2.392 and −2.175 between 1992 and 2013, with an average R2 value of 0.664, indicating a clear clustering pattern of EPC. It is also proved that GDP is a more important impact factor to EPC than the population. Our findings can offer an effective way to understand spatiotemporal evolution characteristics of EPC in the Belt and Road countries, and provide references for regional socioeconomic development and cooperation. |
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0360-5442 |
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no |
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GFZ @ kyba @ |
Serial |
2487 |
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Author |
Shi, G.; Jiang, N.; Li, Y.; He, B. |
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Title |
Analysis of the Dynamic Urban Expansion Based on Multi-Sourced Data from 1998 to 2013: A Case Study of Jiangsu Province |
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Journal Article |
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Year |
2018 |
Publication |
Sustainability |
Abbreviated Journal |
Sustainability |
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Volume |
10 |
Issue |
10 |
Pages |
3467 |
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Keywords |
Remote Sensing |
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Abstract |
Recently, with the fast speed of urban expansion, research concerning the regulation of urban built-up area expansion is a significant topic, especially in Eastern China with its high urbanization level. The Defense Meteorological Satellite Program’s Operational Linescan System (DMSP/OLS) nighttime light data has a high association with the urban-rural distribution, which provides a new method to study urban expansion effectively and with relatively high accuracy. Between 1998 and 2013, China experienced a rapid economic development period, making it crucial to learn the patterns and driving forces to better manage urban master planning and sustainable development. The urban built-up area for the research years are mapped, and the annual urban expansion speed, urbanization intensity index, and built-up area gravity center are analyzed in this paper. The results will show that the amount of the urban built-up area grows continuously from 1998 to 2008, with the development focus in southern Jiangsu, while from 2008 to 2013, the development center moves to northern Jiangsu. The main driving forces behind this urban built-up area expansion are population growth and economic development. |
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2071-1050 |
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Call Number |
GFZ @ kyba @ |
Serial |
2018 |
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