Limiting Factors In Photosynthesis (For Class 7, 10 and 11)
* Law of minimum was proposed by a Libeg in 1843.
* Law of limiting factors was proposed by F.F Blackman in 1905.
* The factor which is the minimum level is called the limiting factor . when a process is conditioned as to its rapidity by a number of separate factors the process is limited by the by the pace of slowest factor .This is called the law of limiting factor.
* When the concentration of the limiting factor is increased to a certain extent , the rate of process also increases.
* Factors which influences the rate of photosynthesis are of two kinds.
1. External factors that is environmental factor and
2. Internal factors.
* The important environmental factors are number one light , carbon dioxide concentration, oxygen concentration, temperature, water ,mineral salts.
* The degradation of chlorophyll molecule due to high light intensity is called photo oxidation.
* Photo oxidation of chlorophyll under very high light intensity is called solarization.
* Rate of photosynthesis is maximum in red light and then in blue light.
* Rate of photosynthesis is minimum in green light.
* Rate of photosynthesis is more in intermittent light than in continuous light.
* If carbon dioxide concentration is increased from 0.03% to 1% the rate of photosynthesis also increases.
* When carbon dioxide concentration is more than 1% the rate of photosynthesis decreases due to closure of stomata.
* Carbon dioxide reacts with water to form carbonic acid when it is in high concentration.
* The most common limiting factor for photosynthesis is carbon dioxide.
* Light occupies the next place.
* Rate of photosynthesis decreases in high concentration of oxygen.
* The inhibitory effect of oxygen on photosynthetic rate is called Warburg effect.
* In C3 plants high oxygen concentration leads to the occurrence of photorespiration as a result net yield of photosynthesis decreases.
* Temperature has maximum influence on dark phase of photosynthesis. And hence the dark phase is called a thermochemical reaction.
* Accumulation of Carbohydrates decreases the rate of photosynthesis is due to non availability of space for new molecules.
* As the leaf expands the stomata , will be opened to the external atmosphere. Rate of photosynthesis increases due to the entry of carbon dioxide.
* Law of minimum was proposed by a Libeg in 1843.
* Law of limiting factors was proposed by F.F Blackman in 1905.
* The factor which is the minimum level is called the limiting factor . when a process is conditioned as to its rapidity by a number of separate factors the process is limited by the by the pace of slowest factor .This is called the law of limiting factor.
* When the concentration of the limiting factor is increased to a certain extent , the rate of process also increases.
* Factors which influences the rate of photosynthesis are of two kinds.
1. External factors that is environmental factor and
2. Internal factors.
* The important environmental factors are number one light , carbon dioxide concentration, oxygen concentration, temperature, water ,mineral salts.
* The degradation of chlorophyll molecule due to high light intensity is called photo oxidation.
* Photo oxidation of chlorophyll under very high light intensity is called solarization.
* Rate of photosynthesis is maximum in red light and then in blue light.
* Rate of photosynthesis is minimum in green light.
* Rate of photosynthesis is more in intermittent light than in continuous light.
* If carbon dioxide concentration is increased from 0.03% to 1% the rate of photosynthesis also increases.
* When carbon dioxide concentration is more than 1% the rate of photosynthesis decreases due to closure of stomata.
* Carbon dioxide reacts with water to form carbonic acid when it is in high concentration.
* The most common limiting factor for photosynthesis is carbon dioxide.
* Light occupies the next place.
* Rate of photosynthesis decreases in high concentration of oxygen.
* The inhibitory effect of oxygen on photosynthetic rate is called Warburg effect.
* In C3 plants high oxygen concentration leads to the occurrence of photorespiration as a result net yield of photosynthesis decreases.
* Temperature has maximum influence on dark phase of photosynthesis. And hence the dark phase is called a thermochemical reaction.
* Accumulation of Carbohydrates decreases the rate of photosynthesis is due to non availability of space for new molecules.
* As the leaf expands the stomata , will be opened to the external atmosphere. Rate of photosynthesis increases due to the entry of carbon dioxide.
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