| Records |
| Author |
Meravi, N.; Kumar Prajapati, S. |
| Title |
Effect street light pollution on the photosynthetic efficiency of different plants |
Type |
Journal Article |
| Year |
2020 |
Publication |
Biological Rhythm Research |
Abbreviated Journal |
Biological Rhythm Research |
| Volume |
51 |
Issue |
1 |
Pages |
67-75 |
| Keywords |
Plants; Light pollution; Fv/Fm; Y (NPQ); Y (NO); Fluorescence |
| Abstract |
The present study was conducted to study the effect of light pollution on the photosynthetic efficiency of plants growing near to street light. The photosynthetic parameters Fv/Fm (Fm – Fo/Fm); maximum photochemical quantum yield of PS II (photosystem II), Y II (photochemical quantum yield of photosystem II), Y (NPQ), Y (NO) were recorded with the help of JUNIOR‐PAM, Chlorophyll Fluorometer, Heinz Walz GmbH, Germany. It was observed that various parameters were adversely affected and the observed values show that plants is under some sort of stress which may be disturbing their normal physiological processes. |
| Address |
sntshprjpt ( at ) rediffmail.com |
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| Publisher |
Taylor & Francis |
Place of Publication |
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| Language |
English |
Summary Language |
English |
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0929-1016 |
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| Call Number |
IDA @ john @ |
Serial |
3408 |
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| Author |
Shillo, R., & Halevy, A. H. |
| Title |
Interaction of photoperiod and temperature in flowering-control of Gypsophila paniculata L |
Type |
Journal Article |
| Year |
1982 |
Publication |
Scientia Horticulturae |
Abbreviated Journal |
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| Volume |
16 |
Issue |
4 |
Pages |
385-393 |
| Keywords |
Plants |
| Abstract |
Long day promotes flowering of Gysophila paniculata L cultivar ‘Bristol Fairy’. Repeated treatments with GA3 or GA4 + 7 in short days did not promote flowering. The long photoperiod is effective only at relatively high temperatures. At night temperatures below 12°C, the plants remain vegetative even in long days. Efficient artificial lighting is from incandescent lamps at 60–100 lux. Fluorescent lighting (Cool-White) is not effective. Lighting of 4 hours as a night-break or at the end of the night were equally effective, but 4 hours lighting as a day-extension was less effective. Whole-night lighting promoted flowering more than any of the 4-hour lighting regimes. Cyclic lighting of one third light in each cycle promoted flowering to the same extent as continuous lighting. Light intensity during the day has a decisive effect on flower production. |
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IDA @ intern @ |
Serial |
2370 |
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| Author |
Singhal, R. K., Kumar, V., Kumar, M., & Bose, B. |
| Title |
Responses of different light intensities and continue light during dark period on rice (Oryza sativa L.) seed germination and seedling development |
Type |
Journal Article |
| Year |
2019 |
Publication |
Journal of Pharmacognosy and Phytochemistry |
Abbreviated Journal |
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| Volume |
8 |
Issue |
4 |
Pages |
2602-2609 |
| Keywords |
Plants |
| Abstract |
Temperature, humidity and moisture content are the important abiotic component regulating seedling establishment in plants including rice. Light factor intensity and duration are also important environmental factors regulating rice growth and development. In the growth and development of rice crop germination followed by seedling establishment is the foremost and very important growth stages. Light component such as intensity, direction and duration are the regulating factor for several physiological, biochemical and molecular processes in plants. To consider these facts, in the present piece of work rice seed of HUR-105 grown under different light regimes, from T1 (2000 lux for 12 h during day time + 12 h dark period) (lower light intensity), T2 (4000 lux for 12 h during day time+ 12 h dark period), T3 (6000 lux for 12 h during day time + 12 h dark period) (moderate), T4 (9000 lux for 12 h during day time + 12 h dark period) (optimum) and to T5 (9000 lux for 12h during day time + 200 lux for 12 h during night time). Germination, seedling growth and biochemical parameters were observed at different time intervals. It was observed that germination %, germination index (GI), germination rate index (GRI), coefficient of velocity of germination (CVG), mean germination rate (MGR), seedling vigour (SV), α-amylase activity and soluble sugar content significantly reduced in both the treatments T1 and T5. Further, the mean time germination and insoluble sugar content were increased in T1 and T5 treatment. The present experiment concluded that both lower light intensity (T1) and addition of low light during dark period (considered as night light pollution) causes stress condition and reduce germination and seedling establishment potential of rice crop. |
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IDA @ intern @ |
Serial |
2738 |
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| Author |
Li, X.T., Chen, B., Wang, H.J., Zheng, G., Yang, D., Miao, X.Y., & Xu, C. |
| Title |
Effects of urban nighttime light on the growth of Cinnamomum camphora |
Type |
Journal Article |
| Year |
2019 |
Publication |
Ying Yong Sheng Tai Xue Bao |
Abbreviated Journal |
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| Volume |
30 |
Issue |
7 |
Pages |
2284-2290 |
| Keywords |
Plants |
| Abstract |
To understand the effects of urban artificial nighttime light on the growth of evergreen trees, we conducted a field investigation in a typical urban street planted with Cinnamomum camphora (a common evergreen street tree species in eastern China) in the Nanjing City, China. Along the street, trees from two types of growing locations with contrasting distances from the street lamp (just under the lamp vs. between two adjacent lamps) were selected. The growth-related plant functional traits were measured and compared. The results showed that trees grown under the lamp had a mean diameter at beast height (DBH) of 16.8 cm, current-year branch productivity (CBP) of 309.4 g·m-2, current-year leaf productivity (CLP) of 241.5 g·m-2, and leaf relative chlorophyll content (LCC) of 34.6 SPAD. Trees grown between lamps had a mean DBH of 15.5 cm, CBP of 273.4 g·m-2, CLP of 212.8 g·m-2, and LCC of 33.1 SPAD. DBH, CBP, CLP and LCC of the trees under the lamp were significantly higher than those between lamps. There was no significant difference in specific leaf area between trees from the two locations. Our results suggested that urban artificial nighttime light could promote the growth of C. camphora, and alter sunlight-determined characteristics of canopy growth vigor.
为了解常绿乔木对城市夜间灯光的生长响应,以华东地区典型常绿行道树种香樟为对象,研究南京市一条典型道路上近灯处(路灯正下方)和远灯处(两相邻路灯中间位置)生长区位的夜间光照强度差异性对香樟生长性状的影响.结果表明: 近灯处香樟的平均胸径为16.8 cm,当年生小枝总生产力为309.4 g·m-2,当年生叶片生产力为241.5 g·m-2,叶片相对叶绿素含量为34.6 SPAD.远灯处香樟的平均胸径为15.5 cm,当年生小枝总生产力为273.4 g·m-2,当年生叶片生产力为212.8 g·m-2,叶片相对叶绿素含量为33.1 SPAD.近灯处香樟的平均胸径、当年生小枝总生产力、当年生叶片生产力及叶片相对叶绿素含量均显著高于远灯处.两处树木间比叶面积没有显著差异.夜间灯光的补充照明促进了近灯处香樟的生长,并改变了树冠生长对阳光的响应特征. |
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| Language |
Chinese |
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IDA @ intern @ |
Serial |
2728 |
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| Author |
Maksimainen, M.; Vaaja, M.T.; Kurkela, M.; Virtanen, J.-P.; Julin, A.; Jaalama, K.; Hyyppä, H. |
| Title |
Nighttime Mobile Laser Scanning and 3D Luminance Measurement: Verifying the Outcome of Roadside Tree Pruning with Mobile Measurement of the Road Environment |
Type |
Journal Article |
| Year |
2020 |
Publication |
ISPRS International Journal of Geo-Information |
Abbreviated Journal |
Ijgi |
| Volume |
9 |
Issue |
7 |
Pages |
455 |
| Keywords |
Lighting; Plants; Instrumentation |
| Abstract |
Roadside vegetation can affect the performance of installed road lighting. We demonstrate a workflow in which a car-mounted measurement system is used to assess the light-obstructing effect of roadside vegetation. The mobile mapping system (MMS) includes a panoramic camera system, laser scanner, inertial measurement unit, and satellite positioning system. The workflow and the measurement system were applied to a road section of Munkkiniemenranta, Helsinki, Finland, in 2015 and 2019. The relative luminance distribution on a road surface and the obstructing vegetation were measured before and after roadside vegetation pruning applying a luminance-calibrated mobile mapping system. The difference between the two measurements is presented, and the opportunities provided by the mobile 3D luminance measurement system are discussed. |
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2220-9964 |
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| Call Number |
GFZ @ kyba @ |
Serial |
3092 |
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