00:02
Hello, my dear students, the concept given is about the camp pathway or otherwise called as cracillacin acid metabolism in plants.
00:15
Such kind of plants are also called as cam plants.
00:18
What is required for us is to find out that characteristic which is incorrect with respect to cam pathway.
00:28
Let us get into the explanation with a suitable image.
00:34
So my dear friends, first of all, what is this? scrasylacian acid metabolism.
00:39
Well, it is a type of biosynthetic phase or carbon fixation phase in certain plants or arid plants which are exposed to too much sunlight in order to reduce or minimize transpiration.
01:04
Now here what happens in the night the stomata opens.
01:10
Okay so at that time the carbon dioxide in the atmosphere diffuses in gets converted into the c4 acid or oxaloacetic acid okay then the carbon dioxide reacts with phosphoenolpyrid in the presence of enzyme phosphoenolpiroid carboxylase there is initial carboxillation taking place here to form a c4 acid which is stored in the vacuil of the plant in the form of malate or malic acid another c4 acid.
01:46
Now during the day what happens this mallet moves out of the vacuole undergoes decarboxillation in the stroma of the chloroplast gets converted into a c3 acid and on the conversion there is decarboxillation taking place which will leases carbon dioxide.
02:05
So there is an internal source of carbon dioxide rather than depending on the environment.
02:11
They want to close their stomata in the day in order to reduce the loss of water in the form of vapor.
02:19
That is nothing but transpiration.
02:21
So there is an internal source of carbon dioxide here which is been used by c3 cycle or calvin cycle in order to form the sugar.
02:29
Okay.
02:30
So there is two type of carboxylation taking place here.
02:33
Here there is a primary carboxylation.
02:36
Here there is secondary carboxilation taking place.
02:39
Okay, that's nothing but fixing the carbon dioxide...