EFFECTS OF LIGHT SPECTRAL QUALITY ON NUTRIENT UPTAKE BY TOMATO

1988 ◽  
Vol 68 (1) ◽  
pp. 287-289 ◽  
Author(s):  
N. TREMBLAY ◽  
M.-C. GASIA ◽  
M.-Th. FERAUGE ◽  
A. GOSSELIN ◽  
M. J. TRUDEL
Keyword(s):  
High Pressure ◽  
Calcium Uptake ◽  
Light Quality ◽  
Controlled Environment ◽  
Light Sources ◽  
Spectral Quality ◽  
Mineral Uptake ◽  
Tomato Plants ◽  
Light Spectral Quality ◽  
Nutrient Solutions

Young tomato plants (Lycopersicon esculentum Mill. ’Duranto’) were grown in a controlled environment under three light sources. The plants were fertilized with nutrient solutions containing either 45Ca, 86Rb, 59Fe or 54Mn. Calcium uptake increased significantly under white deluxe and grow-lux lamps as compared to high-pressure sodium, while Rb uptake was higher under gro-lux lamps. No significant differences in uptake were obtained for Fe or Mn among light sources.Key words: Tomato, Isotope, Mineral uptake, Light quality

scholarly journals Improving Cannabis Bud Quality and Yield with Subcanopy Lighting

HortScience ◽  
2018 ◽  
Vol 53 (11) ◽  
pp. 1593-1599 ◽  
Author(s):  
Dave Hawley ◽  
Thomas Graham ◽  
Michael Stasiak ◽  
Mike Dixon
Keyword(s):  
Significant Variation ◽  
Light Quality ◽  
Cannabis Sativa ◽  
Control Treatment ◽  
Plant Canopy ◽  
Specific Production ◽  
Spectral Quality ◽  
Terpene Content ◽  
Light Spectral Quality ◽  
Lower Plant

The influence of light spectral quality on cannabis (Cannabis sativa L.) development is not well defined. It stands to reason that tailoring light quality to the specific needs of cannabis may increase bud quality, consistency, and yield. In this study, C. sativa L. ‘WP:Med (Wappa)’ plants were grown with either no supplemental subcanopy lighting (SCL) (control), or with red/blue (“Red-Blue”) or red-green-blue (“RGB”) supplemental SCL. Both Red-Blue and RGB SCL significantly increased yield and concentration of total Δ9-tetrahydrocannabinol (Δ9-THC) in bud tissue from the lower plant canopy. In the lower canopy, RGB SCL significantly increased concentrations of α-pinine and borneol, whereas both Red-Blue and RGB SCL increased concentrations of cis-nerolidol compared with the control treatment. In the upper canopy, concentrations of α-pinine, limonene, myrcene, and linalool were significantly greater with RGB SCL than the control, and cis-nerolidol concentration was significantly greater in both Red-Blue and RGB SCL treated plants relative to the control. Red-Blue SCL yielded a consistently more stable metabolome profile between the upper and lower canopy than RGB or control treated plants, which had significant variation in cannabigerolic acid (CBGA) concentrations between the upper and lower canopies. Overall, both Red-Blue and RGB SCL treatments significantly increased yield more than the control treatment, RGB SCL had the greatest impact on modifying terpene content, and Red-Blue produced a more homogenous bud cannabinoid and terpene profile throughout the canopy. These findings will help to inform growers in selecting a production light quality to best help them meet their specific production goals.

INFLUENCE OF IRRADIANCE-PHOTOPERIOD COMBINATION ON TOMATO MINERAL NUTRITION

1987 ◽  
Vol 67 (2) ◽  
pp. 559-566 ◽  
Author(s):  
NICOLAS TREMBLAY ◽  
MARC-J. TRUDEL ◽  
ANDRÉ GOSSELIN
Keyword(s):  
High Pressure ◽  
Lycopersicon Esculentum ◽  
Major Ions ◽  
Reductase Activity ◽  
Nitrogen Concentration ◽  
Natural Light ◽  
Mineral Uptake ◽  
Tomato Plants ◽  
Lycopersicon Esculentum Mill ◽  
Supplementary Lighting

The irradiance-photoperiod combination was modified in an attempt to enhance the mineral uptake of tomato plants (Lycopersicon esculentum Mill. ’Marone’). Tomato plants grown in natural light were compared to plants receiving 7.56 × 105 J m−2 d−1 (400–700 nm) of high-pressure sodium (HPS) supplementary light provided at either low irradiance-long photoperiod (LILP) or high irradiance-short photoperiod (HISP). The LILP treatment promoted the greatest uptake of most major ions followed by natural light and HISP-grown plants, respectively. Supplementary lighting increased Mg concentration in the top and affected K concentration within plants differentially depending on the plant part analyzed. Nitrogen concentration in the shoot below the second flower cluster (midsection of top growth) and Ca concentration in the roots varied depending on the combination of irradiance-photoperiod. Phosphorus concentrations were not affected. Iron and Mn uptake tended to be depressed by HPS treatments. The results are consistent with the hypothesis which relates nutrient uptake to nitrate reductase activity (NRA), although NRA was not specifically measured in this experiment.Key words: Tomato, nutrition, high-pressure sodium, supplementary lighting, mineral uptake, Lycopersicon esculentum Mill.

Design of Solar-Powered LED Road Lighting System

2019 ◽  
pp. 75-85
Author(s):  
Canan Perdahci ◽  
Hamdi Ozkan
Keyword(s):  
High Pressure ◽  
Renewable Energy Sources ◽  
Junction Temperature ◽  
Mercury Vapour ◽  
Light Sources ◽  
Street Lighting ◽  
Led Light ◽  
Road Lighting ◽  
Lighting Systems ◽  
High Pressure Sodium Lamp

Turkey is rich in terms of renewable energy sources and, therefore, is now encouraging the use of sustainable clean lighting systems in road applications. High pressure sodium lamp is the most widely used type in main roads, but other types of lamps such as mercury vapour lamps or metal halide lamps can be utilized for street lighting. Since it enables energy and money saving, LED light technology has replaced high pressure sodium lamps nowadays. Once solar power system (PV) is integrated with LED lamp for street lighting, the amount of saving and local impact might be enriched. LEDs used as light sources in road lighting luminaires with rising lumen values, decreasing junction temperature, higher colour rendering efficiency, longer lifetime have become more efficient than many light sources with the latest developments. Since the structure of the luminaires in which the LED light sources are used differs from that of the conventional light sources, the optical, thermal and electrical design of the LED luminaires must be considered differently. Thus, this study concentrates upon design considerations and the operating principle of solarpowered LED road lighting luminaire in details. Also, a simple solar panel system was designed and the economical values obtained at the end of 20 years were compared when using the ongrid system and the off-grid system.

Evaluation of tomato hybrids with different level of ripe rate under hydroponic conditions (fitopyramide)

2020 ◽  
Author(s):  
M.N. AL-Rukabi ◽  
◽  
V.I. Leunov
Keyword(s):  
Mineral Nutrient ◽  
Tomato Plants ◽  
Agricultural Method ◽  
Seedling Germination ◽  
Greenhouse Tomatoes ◽  
Hydroponic Conditions ◽  
Nutrient Solutions ◽  
Variety Testing

Greenhouse tomatoes are divided into early, medium and late-maturing. The days from seedling germination to the first harvest are taken into account. Tomato has a huge potential for heterosis in terms of precocity, overall yield, signs of resistance and uniformity. The preferred agricultural method is hydroponics, which allows you to grow plants without using soil, only using mineral nutrient solutions in water. The cultivation of tomato plants on the " Fitopyramida " will allow to sell their products in the periods with the highest realized prices. An experiment on variety testing of 11 tomato hybrids of different product groups that differ in precocity allowed us to select the most adapted to the conditions of the " Fitopyramida " technology, including the indeterminate beef Ruddy ball F1, cherry hybrids Elf F1 and orange-fruited cherry Magic harp F1. the determinant hybrid Captain F1 showed Good results.

The Research on the Application of Two Kinds of Light Sources in the Training Venue for Physical Education of Universities

2012 ◽  
Vol 430-432 ◽  
pp. 1786-1790 ◽  
Author(s):  
Shu Fang Li
Keyword(s):  
Energy Efficiency ◽  
High Pressure ◽  
Physical Education ◽  
Lighting Design ◽  
Light Sources ◽  
Metal Halide Lamp ◽  
Sodium Lamp ◽  
Electric Light ◽  
High Pressure Sodium Lamp ◽  
Power And Energy

The energy efficiency experiment of electric light is implemented according to the lighting design of the physical training venues. In the experiment, the corresponding illumination, power and energy efficiency ratio of the commonly used high pressure sodium lamp and metal halide lamp which work under the voltage ranging from 187V to 234V are experimentally measured and the lighting effect characteristics of the two kinds of electric light sources compared, proving that the high pressure sodium light source should be employed in the training venue for physical education of universities.

scholarly journals Halotolerant Microbial Consortia for Sustainable Mitigation of Salinity Stress, Growth Promotion, and Mineral Uptake in Tomato Plants and Soil Nutrient Enrichment

2021 ◽  
Vol 13 (15) ◽  
pp. 8369
Author(s):  
Chintan Kapadia ◽  
R. Z. Sayyed ◽  
Hesham Ali El Enshasy ◽  
Harihar Vaidya ◽  
Deepshika Sharma ◽  
...  
Keyword(s):  
Salt Stress ◽  
Salinity Stress ◽  
Dry Weight ◽  
Stress Factors ◽  
Microbial Consortia ◽  
Soil Conditions ◽  
Mineral Uptake ◽  
Shoot Height ◽  
Tomato Plants ◽  
Secondary Roots

Salinity significantly impacts the growth, development, and reproductive biology of various crops such as vegetables. The cultivable area is reduced due to the accumulation of salts and chemicals currently in use and is not amenable to a large extent to avoid such abiotic stress factors. The addition of microbes enriches the soil without any adverse effects. The effects of microbial consortia comprising Bacillus sp., Delftia sp., Enterobacter sp., Achromobacter sp., was evaluated on the growth and mineral uptake in tomatoes (Solanum Lycopersicum L.) under salt stress and normal soil conditions. Salinity treatments comprising Ec 0, 2, 5, and 8 dS/m were established by mixing soil with seawater until the desired Ec was achieved. The seedlings were transplanted in the pots of the respective pH and were inoculated with microbial consortia. After sufficient growth, these seedlings were transplanted in soil seedling trays. The measurement of soil minerals such as Na, K, Ca, Mg, Cu, Mn, and pH and the Ec were evaluated and compared with the control 0 days, 15 days, and 35 days after inoculation. The results were found to be non-significant for the soil parameters. In the uninoculated seedlings’ (control) seedling trays, salt treatment significantly affected leaf, shoot, root dry weight, shoot height, number of secondary roots, chlorophyll, and mineral contents. While bacterized seedlings sown under saline soil significantly increased leaf (105.17%), shoot (105.62%), root (109.06%) dry weight, leaf number (75.68%), shoot length (92.95%), root length (146.14%), secondary roots (91.23%), and chlorophyll content (−61.49%) as compared to the control (without consortia). The Na and K intake were higher even in the presence of the microbes, but the beneficial effect of the microbe helps plants sustain in the saline environment. The inoculation of microbial consortia produced more secondary roots, which accumulate more minerals and transport substances to the different parts of the plant; thus, it produced higher biomass and growth. Results of the present study revealed that the treatment with microbial consortia could alleviate the deleterious effects of salinity stress and improve the growth of tomato plants under salinity stress. Microbial consortia appear to be the best alternative and cost-effective and sustainable approach for managing soil salinity and improving plant growth under salt stress conditions.

scholarly journals Light Quality of Artificial Light Sources for Agriculture

2013 ◽  
Vol 25 (3) ◽  
pp. 142-145
Author(s):  
Hiroshi HAMAMOTO ◽  
Keisuke YAMAZAKI
Keyword(s):  
Light Quality ◽  
Artificial Light ◽  
Light Sources

scholarly journals Effect of Suboptimal Nutritional Status on Mineral Uptake and Carbohydrate Metabolism in Tomato Plants

2013 ◽  
Vol 46 (5) ◽  
pp. 351-358 ◽  
Author(s):  
Jwakyung Sung ◽  
Sangmin Lee ◽  
Suyeon Lee ◽  
Rogyoung Kim ◽  
Yejin Lee ◽  
...  
Keyword(s):  
Nutritional Status ◽  
Carbohydrate Metabolism ◽  
Mineral Uptake ◽  
Tomato Plants

Influence of Pythium oligandrum on the bacterial communities that colonize the nutrient solutions and the rhizosphere of tomato plants

2012 ◽  
Vol 58 (9) ◽  
pp. 1124-1134 ◽  
Author(s):  
J. Vallance ◽  
F. Déniel ◽  
G. Barbier ◽  
L. Guerin-Dubrana ◽  
N. Benhamou ◽  
...  
Keyword(s):  
Genetic Structure ◽  
Root System ◽  
Quantitative Pcr ◽  
Bacterial Communities ◽  
Single Strand Conformation Polymorphism ◽  
Pythium Oligandrum ◽  
Tomato Plants ◽  
Cropping Season ◽  
Nutrient Solutions ◽  
Conformation Polymorphism

The influence exerted by the biocontrol oomycete Pythium oligandrum on the bacterial populations proliferating in the rhizosphere of tomato plants grown in a hydroponic system and in the circulating solutions is studied in the present experiment. Quantitative PCR and single-strand conformation polymorphism were used to investigate the genetic structure and dynamics of the bacterial communities colonizing the root systems and the various circulating solutions. Quantitative PCR assays showed that bacteria heavily colonized the rhizosphere of tomato plants with, however, no significant density changes throughout the cultural season (April–September). Single strand conformation polymorphism fingerprints revealed the occurrence of transient perturbations in the rhizospheric indigenous bacterial communities following P. oligandrum introduction in the root system of plants. This effect was, however, transient and did not persist until the end of the cropping season. Interestingly, the genetic structure of the bacterial microflora colonizing either the roots or the nutrient solutions evolved throughout the cropping season. This temporal evolution occurred whatever the presence and persistence of P. oligandrum in the rhizosphere. Evidence is also provided that bacterial microflora that colonize the root system are different from the ones colonizing the circulating solutions. The relationships between these 2 microflora (at the root and solution levels) are discussed.

Sign in / Sign up

Export Citation Format

Share Document