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https://www.readbyqxmd.com/read/30221107/transcriptome-analysis-and-physiological-responses-of-the-potato-plantlets-in-vitro-under-red-blue-and-white-light-conditions
#1
Jianmin Xu, Zhiming Yan, Zhigang Xu, Yuanhua Wang, Zhenqiang Xie
Light is an important factor for plant development and has serious effects on the growth, production and quality of potatoes. However, the physical and molecular mechanisms by which potato plantlets cope with different light qualities are not understood. In this study, the potato "Zhuanxinwu", which is a germplasm potato resource with a high anthocyanin content, was used for physiological and transcriptome profiling analyses to uncover the different mechanisms that occur in response to blue, red and white light conditions, with the white light condition serving as the control...
September 2018: 3 Biotech
https://www.readbyqxmd.com/read/30057304/low-levels-of-artificial-light-at-night-strengthen-top-down-control-in-insect-food-web
#2
Dirk Sanders, Rachel Kehoe, Dave Cruse, F J Frank van Veen, Kevin J Gaston
Artificial light has transformed the nighttime environment of large areas of the earth, with 88% of Europe and almost 50% of the United States experiencing light-polluted night skies [1]. The consequences for ecosystems range from exposure to high light intensities in the vicinity of direct light sources to the very widespread but lower lighting levels further away [2]. While it is known that species exhibit a range of physiological and behavioral responses to artificial nighttime lighting [e.g., 3-5], there is a need to gain a mechanistic understanding of whole ecological community impacts [6, 7], especially to different light intensities...
August 6, 2018: Current Biology: CB
https://www.readbyqxmd.com/read/29784957/metabolic-reprogramming-in-leaf-lettuce-grown-under-different-light-quality-and-intensity-conditions-using-narrow-band-leds
#3
Kazuyoshi Kitazaki, Atsushi Fukushima, Ryo Nakabayashi, Yozo Okazaki, Makoto Kobayashi, Tetsuya Mori, Tomoko Nishizawa, Sebastian Reyes-Chin-Wo, Richard W Michelmore, Kazuki Saito, Kazuhiro Shoji, Miyako Kusano
Light-emitting diodes (LEDs) are an artificial light source used in closed-type plant factories and provide a promising solution for a year-round supply of green leafy vegetables, such as lettuce (Lactuca sativa L.). Obtaining high-quality seedlings using controlled irradiation from LEDs is critical, as the seedling health affects the growth and yield of leaf lettuce after transplantation. Because key molecular pathways underlying plant responses to a specific light quality and intensity remain poorly characterised, we used a multi-omics-based approach to evaluate the metabolic and transcriptional reprogramming of leaf lettuce seedlings grown under narrow-band LED lighting...
May 21, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29770376/field-studies-reveal-functions-of-chemical-mediators-in-plant-interactions
#4
REVIEW
Meredith C Schuman, Ian T Baldwin
Plants are at the trophic base of most ecosystems, embedded in a rich network of ecological interactions in which they evolved. While their limited range and speed of motion precludes animal-typical behavior, plants are accomplished chemists, producing thousands of specialized metabolites which may function to convey information, or even to manipulate the physiology of other organisms. Plants' complex interactions and their underlying mechanisms are typically dissected within the controlled environments of growth chambers and glasshouses, but doing so introduces conditions alien to plants evolved in natural environments, such as being pot-bound, and receiving artificial light with a spectrum very different from sunlight...
July 17, 2018: Chemical Society Reviews
https://www.readbyqxmd.com/read/29604994/a-new-method-for-laboratory-rearing-of-galba-truncatula-the-intermediate-host-of-fasciola-hepatica
#5
Mohammad Moazeni, Amin Ahmadi, Amir Mootabi Alavi
In this study a relatively large and open top aquarium was designed, constructed and introduced as a suitable habitat for nutrition, growth and development as well as for egg laying and breeding of Galba truncatula under laboratory conditions. The soil and water used in the aquarium were collected from the locality in which the snails were collected. The aquarium was placed in a laboratory with temperature of 18-32 ºC and relative humidity of 22-37% respectively, according to the season. The artificial light was controlled by a light timer, giving 12 h of light and 12 h of darkness...
April 15, 2018: Veterinary Parasitology
https://www.readbyqxmd.com/read/29599655/dark-matters-challenges-of-nocturnal-communication-between-plants-and-animals-in-delivery-of-pollination-services
#6
REVIEW
Renee M Borges
The night is a special niche characterized by dim light, lower temperatures, and higher humidity compared to the day. Several animals have made the transition from the day into the night and have acquired unique adaptations to cope with the challenges of performing nocturnal activities. Several plant species have opted to bloom at night, possibly as a response to aridity to prevent excessive water loss through evapotranspiration since flowering is often a water-demanding process, or to protect pollen from heat stress...
March 2018: Yale Journal of Biology and Medicine
https://www.readbyqxmd.com/read/29495387/formation-and-change-of-chloroplast-located-plant-metabolites-in-response-to-light-conditions
#7
REVIEW
Yiyong Chen, Bo Zhou, Jianlong Li, Hao Tang, Jinchi Tang, Ziyin Yang
Photosynthesis is the central energy conversion process for plant metabolism and occurs within mature chloroplasts. Chloroplasts are also the site of various metabolic reactions involving amino acids, lipids, starch, and sulfur, as well as where the production of some hormones takes place. Light is one of the most important environmental factors, acting as an essential energy source for plants, but also as an external signal influencing their growth and development. Plants experience large fluctuations in the intensity and spectral quality of light, and many attempts have been made to improve or modify plant metabolites by treating them with different light qualities (artificial lighting) or intensities...
February 26, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29456548/gaba-shunt-in-durum-wheat
#8
REVIEW
Petronia Carillo
Plant responses to salinity are complex, especially when combined with other stresses, and involve many changes in gene expression and metabolic fluxes. Until now, plant stress studies have been mainly dealt only with a single stress approach. However, plants exposed to multiple stresses at the same time, a combinatorial approach reflecting real-world scenarios, show tailored responses completely different from the response to the individual stresses, due to the stress-related plasticity of plant genome and to specific metabolic modifications...
2018: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29425403/direct-and-indirect-effects-of-light-pollution-on-the-performance-of-an-herbivorous-insect
#9
Kylee Grenis, Shannon M Murphy
Light pollution is a global disturbance with resounding impacts on a wide variety of organisms, but our understanding of these impacts is restricted to relatively few higher vertebrate species. We tested the direct effects of light pollution on herbivore performance as well as indirect effects mediated by host plant quality. We found that artificial light from streetlights alters plant toughness. Additionally, we found evidence of both direct and indirect effects of light pollution on the performance of an herbivorous insect, which indicates that streetlights can have cascading impacts on multiple trophic levels...
February 9, 2018: Insect Science
https://www.readbyqxmd.com/read/29316469/numerical-research-on-the-effects-the-skyglow-could-have-in-phytochromes-and-rqe-photoreceptors-of-plants
#10
H A Solano-Lamphar, M Kocifaj
The increase of artificial light at night has a terrible impact on organisms with nightlife patterns such as a migration, nutrition, reproduction and collective interaction. Plants are not free from this issue as they have life cycle events occurring not only yearly but also daily. Such events relate to daytime variations with seasons in which the flowers of deciduous trees bloom and the leaves of certain trees fall off and change color. A response of plants to artificial light at night still remains poorly quantified; but recent scientific research suggest that skyglow can disturb plants processes...
March 1, 2018: Journal of Environmental Management
https://www.readbyqxmd.com/read/29300365/estimation-of-whole-plant-photosynthetic-rate-of-irwin-mango-under-artificial-and-natural-lights-using-a-three-dimensional-plant-model-and-ray-tracing
#11
Dae Ho Jung, Joon Woo Lee, Woo Hyun Kang, In Ha Hwang, Jung Eek Son
Photosynthesis is an important physiological response for determination of CO₂ fertilization in greenhouses and estimation of crop growth. In order to estimate the whole plant photosynthetic rate, it is necessary to investigate how light interception by crops changes with environmental and morphological factors. The objectives of this study were to analyze plant light interception using a three-dimensional (3D) plant model and ray-tracing, determine the spatial distribution of the photosynthetic rate, and estimate the whole plant photosynthetic rate of Irwin mango ( Mangifera indica L...
January 4, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29210002/tolerance-of-the-eriophyid-mite-aceria-salsolae-to-uv-a-light-and-implications-for-biological-control-of-russian-thistle
#12
Patrick J Moran, M Irene Wibawa, Lincoln Smith
Aceria salsolae (Acari: Eriophyidae) is being evaluated as a candidate biological control agent of Russian thistle (Salsola tragus, Chenopodiaceae), a major invasive weed of rangelands and dryland crops in the western USA. Prior laboratory host range testing under artificial lighting indicated reproduction on non-native Bassia hyssopifolia and on a native plant, Suaeda calceoliformis. However, in field tests in the native range, mite populations released on these 'nontarget' plants remained low. We hypothesized that UV-A light, which can affect behavior of tetranychid mites, would affect populations of the eriophyid A...
December 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/29198310/whole-high-quality-light-environment-for-humans-and-plants
#13
Anton Sharakshane
Plants sharing a single light environment on a spaceship with a human being and bearing a decorative function should look as natural and attractive as possible. And consequently they can be illuminated only with white light with a high color rendering index. Can lighting optimized for a human eye be effective and appropriate for plants? Spectrum-based effects have been compared under artificial lighting of plants by high-pressure sodium lamps and general-purpose white LEDs. It has been shown that for the survey sample phytochrome photo-equilibria does not depend significantly on the parameters of white LED light, while the share of phytoactive blue light grows significantly as the color temperature increases...
November 2017: Life Sciences in Space Research
https://www.readbyqxmd.com/read/28980183/light-emitting-diodes-whether-an-efficient-source-of-light-for-indoor-plants
#14
REVIEW
Muzammal Rehman, Sana Ullah, Yaning Bao, Bo Wang, Dingxiang Peng, Lijun Liu
Availability of sufficient light for growth optimization of plants in greenhouse environment during winter is a major challenge, as light during winter is significantly lower than that in the summer. The most commonly used artificial light sources (e.g., metal halide lamps, high pressure sodium lamps, and high fluorescent lamps) are of low quality and inefficient. Therefore, better options should be developed for sustaining agricultural food production during low levels of solar radiation. In recent advances, light-emitting diodes (LEDs) have remarkable potential as supplemental source of light for promoting plant growth...
November 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28783730/artificial-light-at-night-as-a-new-threat-to-pollination
#15
Eva Knop, Leana Zoller, Remo Ryser, Christopher Gerpe, Maurin Hörler, Colin Fontaine
Pollinators are declining worldwide and this has raised concerns for a parallel decline in the essential pollination service they provide to both crops and wild plants. Anthropogenic drivers linked to this decline include habitat changes, intensive agriculture, pesticides, invasive alien species, spread of pathogens and climate change. Recently, the rapid global increase in artificial light at night has been proposed to be a new threat to terrestrial ecosystems; the consequences of this increase for ecosystem function are mostly unknown...
August 10, 2017: Nature
https://www.readbyqxmd.com/read/28772856/photoactive-nanomaterials-inspired-by-nature-ltl-zeolite-doped-with-laser-dyes-as-artificial-light-harvesting-systems
#16
Leire Gartzia-Rivero, Jorge Bañuelos, Iñigo López-Arbeloa
The herein reported work describes the development of hierarchically-organized fluorescent nanomaterials inspired by plant antenna systems. These hybrid materials are based on nanostructured zeolitic materials (LTL zeolite) doped with laser dyes, which implies a synergism between organic and inorganic moieties. The non-interconnected channeled structure and pore dimensions (7.1 Å) of the inorganic host are ideal to order and align the allocated fluorophores inside, inferring also high thermal and chemical stability...
May 4, 2017: Materials
https://www.readbyqxmd.com/read/28673035/getting-back-to-nature-a-reality-check-for-experiments-in-controlled-environments
#17
COMPARATIVE STUDY
Maria Grazia Annunziata, Federico Apelt, Petronia Carillo, Ursula Krause, Regina Feil, Virginie Mengin, Martin A Lauxmann, Karin Köhl, Zoran Nikoloski, Mark Stitt, John E Lunn, Christine Raines
Irradiance from sunlight changes in a sinusoidal manner during the day, with irregular fluctuations due to clouds, and light-dark shifts at dawn and dusk are gradual. Experiments in controlled environments typically expose plants to constant irradiance during the day and abrupt light-dark transitions. To compare the effects on metabolism of sunlight versus artificial light regimes, Arabidopsis thaliana plants were grown in a naturally illuminated greenhouse around the vernal equinox, and in controlled environment chambers with a 12-h photoperiod and either constant or sinusoidal light profiles, using either white fluorescent tubes or light-emitting diodes (LEDs) tuned to a sunlight-like spectrum as the light source...
July 20, 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/28597414/effects-of-light-emitting-diode-supplementary-lighting-on-the-winter-growth-of-greenhouse-plants-in-the-yangtze-river-delta-of-china
#18
Xue Li, Wei Lu, Guyue Hu, Xiao Chan Wang, Yu Zhang, Guo Xiang Sun, Zhichao Fang
BACKGROUND: The winter in the Yangtze River Delta area of China involves more than 1 month of continuous low temperature and poor light (CLTL) weather conditions, which impacts horticultural production in an unheated greenhouse; however, few greenhouses in this area are currently equipped with a heating device. The low-cost and long-living light-emitting diode (LED) was used as an artificial light source to explore the effects of supplementary lighting during the dark period in CLTL winter on the vegetative characteristics, early yield, and physiology of flowering for pepper plants grown in a greenhouse without heating...
December 2016: Botanical Studies (Taipei, Taiwan)
https://www.readbyqxmd.com/read/28523012/growth-and-accumulation-of-secondary-metabolites-in-perilla-as-affected-by-photosynthetic-photon-flux-density-and-electrical-conductivity-of-the-nutrient-solution
#19
Na Lu, Emmanuel L Bernardo, Chayanit Tippayadarapanich, Michiko Takagaki, Natsuko Kagawa, Wataru Yamori
The global demand for medicinal plants is increasing. The quality of plants grown outdoors, however, is difficult to control. Myriad environmental factors influence plant growth and directly impact biosynthetic pathways, thus affecting the secondary metabolism of bioactive compounds. Plant factories use artificial lighting to increase the quality of medicinal plants and stabilize production. Photosynthetic photon flux density (PPFD) and electrical conductivity (EC) of nutrient solutions are two important factors that substantially influence perilla (Perilla frutescens, Labiatae) plant growth and quality...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28313602/photosynthetic-induction-times-in-shade-tolerant-species-with-long-and-short-lived-leaves
#20
Thomas A Kursar, Phyllis D Coley
In the understory of a tropical rainforest, light flecks can contribute 10-80% of the total light flux. We investigated the capacity of eight shade-tolerant species to use light flecks by examining the time required for full induction of photosynthesis during an artificial light fleck. CO2 fixation rates were measured with a portable LiCor gas-exchange system for plants growing in the field on Barro Colorado Island, Panama. In all species induction to 50% of maximum CO2 fixation occurred quickly, from 1 to 3 min...
March 1993: Oecologia
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