00:01
This video discusses about different types of plants, namely c3, c4 and cem plant.
00:07
All types of plant perform photosynthesis, which is a process of conversion of light energy into chemical energy.
00:23
This chemical energy derived from the sunlight is stored in the form of sugars, which can be later oxidized during cellular respiration to release energy.
00:36
Overall reaction of photosynthesis involves 6 molecules of co2 or carbon dioxide plus 6 molecules of h2 or water to form 1 molecule of glucose or sugar plus 6 molecules of oxygen or other.
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This reaction takes place in the presence of sunlight and the oxygen is released.
01:10
From the stomata as a byproduct.
01:14
Both the uptake of carbon dioxide and release of oxygen is facilitated by a pore on the deep surface known as stomata.
01:31
Apart from the site of exchange of gases, the stomatural aperture is also responsible for loss of water during daytime as the plants undergo transpiration.
01:59
The overall reaction of photosynthesis can be divided into two parts, the light reactions during which the photons are absorbed and the dark reactions, also known as the kelvin cycle, during which the carbon dioxide is fixed.
02:26
The fixation of carbon dioxide involves an enzyme known as rubisco which acts on co2 to form 3 phosphoglycerate which further undergoes cyclic reactions to produce the glucose molecule.
02:53
However, if the concentration of oxygen inside the leaf cell is high, when the ribisco acts on oxygen insect.
03:02
This process wherein the rubisco acts on oxygen is termed as photo respiration.
03:16
Photo respiration is considered as a wasteful process because instead of fixing the carbon dioxide, the plant cells use carbon dioxide to release oxygen.
03:41
Based on the rate of photorespiration occurring in the plants, the plants can be divided into three groups or types.
03:59
The first type of plant are the c3 plants.
04:01
The second type plants are the c4 plants and the third type of plants are cam plants...