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Engineering, HSC and IIT-JEE Mains and
Advanced videos. hello today we are
studying chapter photo synthesis in that
we'll be studying today is what are
basically CAM Plants now there are
certain plants and desert or desert a
plants where temperature is really
really high and this plants for some
other pathway which is crassus acid
metabolism or camp at me
today we'll be studying how desert
plants do CAM Plants
CAM pathway we all know think there's a
big plants or zero fighting plants which
grow in desert have to undergo a lot of
Suns if your desert has huge amount of
Sun other temperatures really really
high now during this phenomena or due to
this phenomena you can say this tomata
has to be closed during think we all
know that the plant doesn't wants to
lose water when it is present in desert
if it will lose all its water to do
transpiration that is loss of water when
the stomata opens during daytime the
can't built an invention or the plant
will be a great loss so what testing
plans to is they close their stomata
during date to avoid loss of water
now if stomata is closed during daytime
don't you think so
that carbon dioxide or whatever you
kills how are they going to enter into
the lymph curricula and how does the
process of photosynthesis take place in
Dayton yes the answer is can pathway or
crescens acid metabolism what happens in
camp pathway is the stomata of the
ascetic plants which is closed during
daytime opens at night time and the
cycle of campus wait takes place at
night time using certain molecules fan
pathway Bose basically first discovered
in to cry of fire dance was first
observed in to brag phylum a member and
doing camp pathway carbon dioxide is
fixed but during night time and once
carbon offset is fixed in night time the
stable product which is obtained in camp
pathway is for the passed on to c3 cycle
in date so let us see how can pathway
actually works and how desert a plants
prepare their food or the photo
synthesis
templates or desert experience basically
campus weight is also polis crescents
acid metabolism and was first observed
in briar phylum leaves now clam pathway
is an alternate for c3 pathway on Kelvin
cycling Blackmun's reaction any of those
in certain plants c3 pathway takes place
whereas in desert it plans c4 path we
take this so if I talk about millets or
you can say Wragge naturally the pathway
that takes place is c3 pathway whereas
desert a plans captors to c4 pathway or
you can say can pathway
this occurs in density clan zero
fighting plants the reasons for can
pathway occurrences that stomata the
openings present in the leaf of a plant
are closed at data who avoid loss of
water we do
transpiration and at nighttime the
stomata open so that the plant can fix
carbon dioxide
in campaigns there are no trans and
above it means there will be no bundle
sheath cells and if there are no bundle
sheath cells obviously IBB won't be
present one second
pep carboxylase will not be present and
we all know that fireboxes has affinity
absorb carbon dioxide less than 50 ppm
so the first stable product that is
formed during this cycle is manic acid
that is formed in night time and at
night time
malic acid is - and when one Sun comes
malic acid is transported and this malic
acid is converted into carbon dioxide
and pyruvic acid that is dated now pile
with acid is a stable 3 carbon compound
whereas the carbon dioxide that is
formed during this process is taken back
or it is deported to calvin cycle or c3
cycle and now the calvin cycle will
start so in this camp line pathway we
have seen that c4 plants remove the
occlusion of stomata at night then
follow the camp pathway or c4 plants and
once carbon dioxide is formed again
Calvin cycle starts to appear so
basically see a desert a plants the camp
pathway as well as cell c3 cycle I've
been used students in this part of the
chapter we have studied about how
crescens acid metabolism or camp pathway
functions and what are the various
parameters on which its sub sites or
residues I hope you're luckier with the
concept of camp
pathway thank you
