Carbon dioxide biofixation byChlorella vulgarisat different CO2concentrations and light intensities

2014 ◽  
Vol 14 (5) ◽  
pp. 509-519 ◽  
Author(s):  
Barbara Clément-Larosière ◽  
Filipa Lopes ◽  
Ana Gonçalves ◽  
Behnam Taidi ◽  
Marc Benedetti ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Light Intensities

Carbon dioxide transfer resistance as a factor in shade tolerance of tree seedlings

1970 ◽  
Vol 48 (3) ◽  
pp. 453-456 ◽  
Author(s):  
J. E. Wuenscher ◽  
T. T. Kozlowski
Keyword(s):  
Carbon Dioxide ◽  
Acer Saccharum ◽  
Net Photosynthesis ◽  
Tree Seedlings ◽  
Transfer Resistance ◽  
Quercus Velutina ◽  
Light Intensities ◽  
Quercus Species ◽  
Highly Correlated ◽  
Resistance Rates

Net photosynthesis and transpiration rates of single leaves of Quercus velutina Lam., Q. macrocarpa Michx. var. olivaeformis, and Acer saccharum Marsh. were measured at light intensities of 0.03 to 0.24 cal cm−2 min−1 (400–700 mμ). Resistance to water vapor and carbon dioxide transfer were calculated. Net photosynthesis of the Quercus species was not light saturated until light intensity was increased sufficiently to induce complete stomatal opening, indicating possible limitation of CO2 uptake at low light intensities by high CO2 transfer resistance. Rates of light-saturated net photosynthesis of all three species were highly correlated with CO2 transfer resistance.

Modified Photobioreactor for Biofixation of Carbon Dioxide byChlorella vulgarisat Different Light Intensities

2015 ◽  
Vol 38 (8) ◽  
pp. 1371-1379 ◽  
Author(s):  
Gita Naderi ◽  
Moses O. Tade ◽  
Hussein Znad
Keyword(s):  
Carbon Dioxide ◽  
Light Intensities

scholarly journals Effect of Light Intensity and Leaf Temperature on Photosynthesis and Transpiration in Wheat and Sorghum

1970 ◽  
Vol 23 (4) ◽  
pp. 775 ◽  
Author(s):  
RW Downes
Keyword(s):  
Carbon Dioxide ◽  
Water Use ◽  
Carbon Dioxide Concentration ◽  
Leaf Temperature ◽  
High Light ◽  
Intercellular Spaces ◽  
Concentration Difference ◽  
Light Levels ◽  
Light Intensities ◽  
Water Vapour Concentration

Wheat stomata offered less resistance to water and carbon dioxide diffusion than sorghum stomata at light intensities of 0�06 and 0�26 cal cm-2 min-i (400-700 nm) but resistances were comparable at 0�46 cal cm-2 min-i. Consequently, transpiration rates were higher in wheat than in sorghum, except at the high light levels, in leaf chamber experiments described here. Rates of photosynthesis were higher in sorghum than in wheat, with the greatest difference at high light levels. This resulted in a greater efficiency of dry matter production relative to water use in sorghum. Transpiration rate increased with increased temperature in both species. Photosynthesis was independent of temperature in wheat, and in sorghum under low light conditions, but otherwise photosynthesis increased with temperature in sorghum. In both species, efficiency of water use decreased as temperature increased at all light intensities. Water vapour concentration difference between the intercellular spaces and the air was comparable in wheat and sorghum and increased with temperature. The carbon dioxide concentration difference between air and intercellular spaces was substantially greater in sorghum than in wheat and increased with leaf temperature. Maximum values were obtained at the intermediate light level in sorghum.

scholarly journals o-PHENANTHROLINE AND DERIVATIVES OF VITAMIN K AS STABILIZERS OF PHOTOREDUCTION IN SCENEDESMUS

1945 ◽  
Vol 28 (3) ◽  
pp. 269-285 ◽  
Author(s):  
H. Gaffron
Keyword(s):  
Carbon Dioxide ◽  
Quantum Yield ◽  
Vitamin K ◽  
Chemical Properties ◽  
Normal Rate ◽  
Low Light ◽  
Strong Light ◽  
Photochemical Process ◽  
Light Intensities ◽  
Derivatives Of

It is known that with increasing concentrations of hydroxylamine the rate of photoreduction in the alga Scenedesmus drops to about one-half of the normal rate. From then on photoreduction remains insensitive to hydroxylamine. The present experiments prove that this strange effect is not specific for hydroxylamine. It can be produced with substances having quite different chemical properties, such as o-phenanthroline, 2-methyl-1,4-naphthoquinone (vitamin K), or 2-oxy-3-methyl-naphthoquinone (phthiocol). Once the rate of photoreduction has been brought down to the limit of exactly one-half by a sufficient dose of any one of these substances, the reaction is also stabilized against reversion under the influence of strong light. At saturation intensities the rate of the stabilized photoreduction may be several times that at which the unpoisoned cells revert to photosynthesis. The ratio of one-half between the rates of the stabilized and the normal photoreduction is found at very low light intensities. This indicates a change in the photochemical process. Since the assimilatory quotient remains unaltered, it is the quantum yield which is cut in half under the influence of the poisons. To explain these observations it is assumed that either just one-half of the primary photoproducts are lost, or that they react back entirely while causing a reduction of carbon dioxide in a way similar to that brought about by the oxyhydrogen reaction in the dark.

Growth kinetics of Marquis wheat. II. Carbon dioxide dependence

1972 ◽  
Vol 50 (4) ◽  
pp. 883-889 ◽  
Author(s):  
F. D. H. Macdowall
Keyword(s):  
Carbon Dioxide ◽  
Light Intensity ◽  
Carbon Dioxide Concentration ◽  
Dry Weight ◽  
Maximum Growth ◽  
Carbon Dioxide Enrichment ◽  
Low Light ◽  
Growth Coefficient ◽  
Light Intensities ◽  
Wide Range

Marquis wheat was grown in growth rooms with four different concentrations of carbon dioxide and four to seven different intensities of light in a 16-h photoperiod at 25 °C. Growth was expressed quantitatively as the pseudo-first-order rate coefficient. Carbon dioxide stimulated growth, but the effect was greater the lower the light intensity in opposition to the known effect on photosynthesis. Carbon dioxide and light, in effect, did not influence the "rate" of growth of wheat additively but, rather, mutually compensated over a wide range. The growth coefficient of the roots was a little less than that of the shoots at all carbon dioxide concentrations and light intensities, probably owing to the cost of translocation. However, root growth benefited most from carbon dioxide enrichment at low light intensities. At intermediate light intensity there appeared to be a carbon dioxide concentration optimal for shoot growth. Carbon dioxide enrichment did not influence the maximum growth coefficient of Marquis wheat with respect to light intensity. The light-using efficiency of growth, calculated for vanishingly low light intensity at which it is maximal, was maximal for shoots at 1300 ppm CO2 but that for laminal area and root dry weight increased with CO2 to 2200 ppm at which the value for "leaves" was nearly fourfold that for roots. Unlike photosynthesis, the stimulation of growth by raised CO2 concentration was accomplished by increased efficiency of, and not capacity for, the net photosynthetic use of light.

Ambient and Elevated Carbon Dioxide on Growth, Physiological and Nutrient Uptake Parameters of Perennial Leguminous Cover Crops under Low Light Intensities

2017 ◽  
Vol 15 (4) ◽  
pp. 1-16 ◽  
Author(s):  
Virupax Baligar ◽  
Marshall Elson ◽  
Zhenli He ◽  
Yuncong Li ◽  
Arlicelio Paiva ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Nutrient Uptake ◽  
Cover Crops ◽  
Elevated Carbon Dioxide ◽  
Low Light ◽  
Light Intensities

scholarly journals CARBON DIOXIDE BALANCE AT HIGH LIGHT INTENSITIES

1935 ◽  
Vol 10 (1) ◽  
pp. 93-114 ◽  
Author(s):  
Elmer S. Miller ◽  
G. O. Burr
Keyword(s):  
Carbon Dioxide ◽  
High Light ◽  
Light Intensities ◽  
Carbon Dioxide Balance

The mechanism of inhibition of photosynthesis by high partial pressures of oxygen in Chlorella

1966 ◽  
Vol 164 (996) ◽  
pp. 511-520 ◽  
Keyword(s):  
Carbon Dioxide ◽  
Partial Pressure ◽  
Low Light ◽  
High Oxygen Partial Pressure ◽  
Carbon 14 ◽  
Light Intensities ◽  
Mechanism Of Inhibition ◽  
Partial Pressures ◽  
Rate Of Photosynthesis ◽  
Sugar Phosphates

The decrease in rate of photosynthesis of 14 CO 2 following a transition from 20 to 99.96% oxygen with 0.04% carbon dioxide was associated with a decrease in radioactivity of the sugar phosphates and an increase in that of glycollic acid. The effect of increasing the partial pressure of oxygen was greater at higher light intensities. At the highest light intensities used the inhibition became irreversible. When carbon-14 was incorporated into the sugar phosphates and the further metabolism of these compounds studied in carbon dioxide free conditions the main products in 20% oxygen were polyglucan and sucrose, but in the presence of high oxygen partial pressure they were glycollate and glycine. Radioactive glucose was fed in the presence of oxygen free of carbon dioxide. At low light intensities the main product was a polyglucan; at higher light intensitie sglycollic acid was formed and radioactive carbon dioxide was produced

NET CARBON DIOXIDE EXCHANGE RATES IN PHASEOLUS VULGARIS L. AS INFLUENCED BY TEMPERATURE, LIGHT INTENSITY, LEAF AREA INDEX, AND AGE OF PLANT

1964 ◽  
Vol 42 (4) ◽  
pp. 393-401
Author(s):  
Douglas P. Ormrod
Keyword(s):  
Carbon Dioxide ◽  
Phaseolus Vulgaris ◽  
Light Intensity ◽  
Exchange Rates ◽  
Leaf Area Index ◽  
Leaf Area ◽  
Planting Density ◽  
Carbon Dioxide Exchange ◽  
Area Index ◽  
Light Intensities

Plants of Phaseolus vulgaris were grown under controlled conditions for 10 to 60 days and then transferred to light intensities of from 0 to 12,000 ft-c at temperatures of 4 to 38 °C for measurement of net carbon dioxide exchange by means of an infrared analyzer. The net carbon dioxide exchange was not markedly influenced by temperature at higher light intensities, particularly with older plants and the greater planting density, but was strikingly influenced by temperature in darkness or low light intensity. The leaf area index affected the rate at which the maximum net carbon dioxide exchange rates were attained. The compensation point increased with aging and with denser planting. The net assimilation decreased at the onset of fruiting. Several features of the experimental method are discussed.

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