scholarly journals Effect of Light Intensity and Plant Size on Rate of Development of Early Boron Deficiency Symptoms in Tomato Root Tips

1969 ◽  
Vol 44 (7) ◽  
pp. 965-967 ◽  
Author(s):  
Claire B. MacInnes ◽  
Luke S. Albert
Keyword(s):  
Light Intensity ◽  
Plant Size ◽  
Boron Deficiency ◽  
Root Tips ◽  
Tomato Root ◽  
Rate Of Development ◽  
Deficiency Symptoms ◽  
Effect Of Light

scholarly journals Effect of Light Intensity and Nutrition Level on Growth and Flowering of Adenium obesum ‘Red’ and ‘Ice Pink’

HortScience ◽  
2014 ◽  
Vol 49 (4) ◽  
pp. 430-433 ◽  
Author(s):  
Kaitlyn McBride ◽  
Richard J. Henny ◽  
Jianjun Chen ◽  
Terri A. Mellich
Keyword(s):  
Light Intensity ◽  
Root Formation ◽  
Dry Weight ◽  
Plant Size ◽  
Floral Display ◽  
Flower Number ◽  
Aesthetic Value ◽  
Shoot Dry Weight ◽  
Quality Ratings ◽  
Effect Of Light

Adenium obesum (Forssk.), Roem. & Schult., commonly known as desert rose, is a high-value, container-grown ornamental plant produced worldwide for its bright floral display and striking sculptural caudex. Little scientific-based information exists regarding the effect of light intensity and nutritional levels on Adenium growth and flowering. In this study, A. obesum ‘Red’ and ‘Ice Pink’ were grown under full sun [with a measured maximum photosynthetically active radiation (PAR) of 1850 μmol·m−2·s−1], 30% shade (1255 μmol·m−2·s−1), or 50% shade (943 μmol·m−2·s−1) in 1.25-L pots top-dressed with controlled-release fertilizer Nutricote® Plus (18N–2.6P–6.6K) at rates to provide 0.4, 0.9, or 1.4 g of nitrogen (N) per pot. Canopy height and width, flower number, and visual quality ratings (based on plant size and form, foliage color, and flowering) were highest after 16 weeks of growth for both cultivars when fertilized with 1.4 g of N per pot. A 30% shade level resulted in plants with the highest flower numbers and quality ratings. Plants grown at 50% shade had the greatest canopy heights and widths, but flower numbers and quality ratings were low. In full sun, plants were smaller overall. In a second experiment, A. obesum ‘Red’ produced the highest shoot dry weight when grown 20 weeks at 30% or 50% shade with 1.4 g of N per pot. Root formation is an important measure of aesthetic value for this crop. As plants mature, roots enlarge dramatically and are often washed to expose sculptural forms. The highest root dry weights were measured at 1.4 g of N under both full sun and 30% shade.

scholarly journals Effect of light intensity, temperature and daylength on the rate of leaf appearance of maize.

1973 ◽  
Vol 21 (1) ◽  
pp. 68-76
Author(s):  
H.D.G. Meyling
Keyword(s):  
Light Intensity ◽  
Natural Radiation ◽  
Rate Of Development ◽  
Leaf Appearance ◽  
Rate Of Leaf Appearance ◽  
Short Days ◽  
Effect Of Light

Periodic sowings of maize cv. C.I.V. 2 were made between 1 Feb. and 25 Nov. in glasshouses controlled at 16 or 25 deg C with light intensity about 75% of natural radiation. Some plants were grown in natural daylength, others in 17-h photoperiods. RGR was considerably affected by light intensity and temperature; at 16 deg C it was only about half that at 25 deg C. Rate of leaf appearance was higher at 25 deg C, and rate of development at 25 deg C was double that at 16 deg C. Plants produced 14.2 leaves in long days and 12.8 leaves in short days. Graphs are given showing the effect of light intensity on NAR and rate of development up to tassel emergence. (Abstract retrieved from CAB Abstracts by CABI’s permission)

Effect of light intensity on the ultrastructure of the filamentous cyanobacterium, Anabaena variabilis

1988 ◽  
Vol 46 ◽  
pp. 300-301
Author(s):  
C. S. Bricker ◽  
S. R. Barnum ◽  
B. Huang ◽  
J. G. Jaworskl
Keyword(s):  
Fatty Acid ◽  
Light Intensity ◽  
Acid Content ◽  
Fatty Acid Content ◽  
Anabaena Variabilis ◽  
Chloroplast Envelope ◽  
Major Constituent ◽  
Filamentous Cyanobacterium ◽  
Photosynthetic Membrane ◽  
Effect Of Light

Cyanobacteria are Gram negative prokaryotes that are capable of oxygenic photosynthesis. Although there are many similarities between eukaryotes and cyanobacteria in electron transfer and phosphorylation during photosynthesis, there are two features of the photosynthetic apparatus in cyanobacteria which distinguishes them from plants. Cyanobacteria contain phycobiliproteins organized in phycobilisomes on the surface of photosynthetic membrane. Another difference is in the organization of the photosynthetic membranes. Instead of stacked thylakolds within a chloroplast envelope membrane, as seen In eukaryotes, IntracytopIasmlc membranes generally are arranged in three to six concentric layers. Environmental factors such as temperature, nutrition and light fluency can significantly affect the physiology and morphology of cells. The effect of light Intensity shifts on the ultrastructure of Internal membrane in Anabaena variabilis grown under controlled environmental conditions was examined. Since a major constituent of cyanobacterial thylakolds are lipids, the fatty acid content also was measured and correlated with uItrastructural changes. The regulation of fatty acid synthesis in cyanobacteria ultimately can be studied if the fatty acid content can be manipulated.

Effect of light intensity and water aging on surface hardness of dental resin-composites

2019 ◽  
Vol 64 (11) ◽  
pp. 1007-1014
Author(s):  
Tong XU ◽  
◽  
Jia-Hui ZHANG ◽  
Zhao-Ying LIU ◽  
Xuan LI ◽  
...  
Keyword(s):  
Light Intensity ◽  
Surface Hardness ◽  
Resin Composites ◽  
Dental Resin ◽  
Dental Resin Composites ◽  
Effect Of Light
Sign in / Sign up

Export Citation Format

Share Document