that may affect the rate of photosynthesis, ..

Several environmental factors influence the photosynthesis, which shows direct responses to the environmental factors like light, ambient CO2 concentrations, and temperature, as well as indirect responses (mediated through the effects of stomatal control) like humidity and soil moisture. However, under any particular conditions, the rate of photosynthesis is limited by the slowest step in the process, the so-called limiting factor. Therefore, at any given time, photosynthesis can be limited either by light or by CO2 concentration, but not by both factors at the same time.

Investigating Factors That Affect the Rate of Photosynthesis

After discussing each factor, brainstorm how that variable might be affected by pollution.

What are factors that affect photosynthesis? | Yahoo …

In the presence of adequate amounts of light, higher CO2 concentrations support higher photosynthetic rates. The reverse is also true: low CO2 concentrations can limit the amount of photosynthesis in C3 plants. Carbon dioxide is a trace gas in the atmosphere, presently accounting for about 0.039%, or 390 parts per million (ppm), of air. Currently the CO2 concentration of the atmosphere is increasing by about 1 to 3 ppm each year. By 2100 the atmospheric CO2 concentration could reach 600 to 750 ppm unless fossil fuel emission are controlled. Carbon dioxide and methane, play a role similar to that of the glass roof in a greenhouse. The increased CO2 concentration and temperature associated with the greenhouse effect can influence photosynthesis. At current atmospheric CO2 concentrations, photosynthesis in C3 plants is CO2 limited, but this situation could change as atmospheric CO2 concentrations continue to rise. Under laboratory conditions, most C3 plants grow 30 to 60% faster when CO2 concentration is doubled (to 600-750 ppm), and the growth rate becomes limited by the nutrient available to the plant.

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When exposed to excess light, leaves must dissipate the surplus absorbed light energy so that it does not harm the photosynthetic apparatus. Heat production and the xanthophylls cycle appears to be important avenues for dissipation of excess light energy. The xanthophylls cycle comprises the three carotenoids violaxanthin, antheraxanthin, and zeaxanthin. Experiments have shown that zeaxanthin is the most effective of the three xanthophylls in heat dissipation. The zeaxanthin content increases at high irradiances and decreases at low irradiances. In leaves growing under full sunlight, zeaxanthin and antheraxanthin can make up 60% of the total xanthophyll cycle pool at maximal irradiance levels attained at midday (). Contrary to the diurnal cycling of this pool observed in summer, zeaxanthin levels remain high all day during the winter. Presumably this mechanism maximizes dissipation of light energy, thereby protecting the leaves against photooxidation during winter.

There are six abiotic factors that affect plant growth: air, water, space, temperature, light and soil (nutrients).
(Grade 3, 4) – The soil is alive with so many things that affect the health and strength of plants

Six facts about photosynthesis - KScience

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....

Learn about the environmental factors that affect the rate at which photosynthesis happens

Factors affecting the rate of photosynthesis

Photosynthesis is a complex reaction and can be
summed up in an equation:

carbon dioxide + water light and chlorophyll glucose + oxygen

[IMAGE] 6 CO 6 H O C H O 6 O

FACTORS THAT EFFECT PHOTOSYNTHESIS Amandeep Virk

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* Light: This factor is just as important as the others are in
Photosynthesis, without it photosynthesis would simply not take place.

what are the three primary factors that affect the rate of photosynthesis - Search Results

Factors Affecting Photosynthesis

Students will examine benefits and environmental costs associated with one of the development proposals facing New Haven: Long Wharf Mall development, expansion of Interstate-95, or installation of a high-speed rail service to New York City.Key concepts introduced and explored are: plant structure, function and use of abiotic factors; environment and ecology, including interdependencies on and within a system; contamination of air, land and water and its affect on various plants; costs and benefits of student demand and current development issues which contribute to pollution.