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Photosynthesis consists of two connected sets of reactions....
Light requirements increased from 30% to 60-100% light transmittance during the transition from seed germination to seedling recruitment in . The germination characteristics (, ) showed a coupling effect with light transmittance on the subsequent pine seedling growth. However, the highest in was observed at 30% light transmittance, which is not the best light regime for seedling growth. There might be a hindrance for the natural regeneration process of resulting from the decreased light transmittance after leaf expansion in the growing season, contrasting with the elevated light requirement for growth. Therefore, disturbances such as gap openings or thinnings are strongly recommended as an operational measure to enlarge canopy openness in temperate secondary forests and improve the natural regeneration of .
The word equation for photosynthesis is: Light [IMAGE]Carbon Dioxide + Water Glucose + Oxygen Chlorophyll Although most of the glucose produced is converted into insoluble starch for storage in the stem, leaves or roots, some is used immediately by the plant to provide via respiration....
The same cycle of the light reaction then takes place.
Variables: The variables that might affect the rate of photosynthesis in this experiment are: Temperature: When the temperature rises so does the rate of photosynthesis; this is because as the temperature around the plant rises the enzymes controlling photosynthesis inside the chloroplasts heat up and start moving around faster, the fast moving molecules collide with other fast moving enzymes causing them to react....
I predict that the light intensity (controllable by volts) will be
directly in proportion to the rate of photosynthesis.
Some Effects of Light Intensity on Plant Growth
We have also learnt that photosynthesis is a vital process that occurs in order to create glucose and oxygen, by transforming carbon dioxide and water in the presence of light energy.
My results also appear to agree with the information on the
theories of photosynthesis, found in most biology texts; though I did
not have enough evidence (results) to prove the theory which says that
after a certain point the rate will cease to rise, as explained
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Low light intensity lowers the rate of photosynthesis
Although this is slightly high for
the temperature in which a plant generally photosynthesises best, (20
degrees centigrade) it was the first temperature at which the
experiment worked successfully, and so we decided that it should be
kept constantly at this in order to conduct a fair test.
The rate of photosynthesis in plants depends upon multiple ..
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How Light Intensity Affects the Rate of Photosynthesis
Temperature. The optimum growth temperature for D. salina is in the range of20 to 40°C (Borowitzka, LJ, 1981a) depending on the strain. Dunaliella salinacan tolerate extremely low temperatures to below freezing (Siegel et al.,1984), but temperatures greater than 40°C are usually lethal. There is alsoa strong interaction between the growth rate, temperature and salinity(Gimmler et al., 1978; Borowitzka, MA & Borowitzka, 1988a) and between lightintensity and temperature tolerance (Federov et al., 1968).
Importance of Light in Photosynthesis (Theory) : Class …
Hypothesis:Photosynthesis is a process by which green plants and certain other organisms use the energy of light to convert carbon dioxide and water into the simple sugar glucose....
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