1) By looking at a plant externally can you tell whether a plant
is C3or C4 why & how?
is C3or C4 why & how?
Externally
morphological characters’ generally do not judge C3 and C4
plants. But some common habitats and characters’ can judge mum. C4
leaves are generally isobilateral but all isobilateral leaves are not C4
in natural & leaves of C3 plants are generally dorsiventral.
morphological characters’ generally do not judge C3 and C4
plants. But some common habitats and characters’ can judge mum. C4
leaves are generally isobilateral but all isobilateral leaves are not C4
in natural & leaves of C3 plants are generally dorsiventral.
Habitat: – C4 plants are tropical plants
while C3 plants are found in all zones on earth.
while C3 plants are found in all zones on earth.
2)
By looking at which internal
structure of a plant can you tell whether a plant is C3 or C4
expert?
By looking at which internal
structure of a plant can you tell whether a plant is C3 or C4
expert?
In case of C4 plants :- In C4 plants a leaf has
kranz anatomy where the undifferentiated mesophyll occurs in concentrate layers
around vascular bundles & each vascular bundle is surrounded by a bundle
sheath of large sixed green cells. Starch grains do not occur in them.
kranz anatomy where the undifferentiated mesophyll occurs in concentrate layers
around vascular bundles & each vascular bundle is surrounded by a bundle
sheath of large sixed green cells. Starch grains do not occur in them.
In case of C3 plants: –
Bundle sheath is not large, nor they contain chloroplasts. Mesophyll is often differentiated
into palisade & spongy parenchyma. They possess starch grass.
Bundle sheath is not large, nor they contain chloroplasts. Mesophyll is often differentiated
into palisade & spongy parenchyma. They possess starch grass.
3)
Even though a very few cells in a
C4 plant carry out byways the tic calves’ pathway yet they are highly
productive. Can you discuss why?
Even though a very few cells in a
C4 plant carry out byways the tic calves’ pathway yet they are highly
productive. Can you discuss why?
Calvin cycle is case of C4
plants occurs is bundle sheath. C4 plants have a high rate of
photosynthesis due to
plants occurs is bundle sheath. C4 plants have a high rate of
photosynthesis due to
1)
Rapid supply of CO2
from all mesophyll cells taking part in initial carbon dioxide fixation.
Rapid supply of CO2
from all mesophyll cells taking part in initial carbon dioxide fixation.
ii) Absence of photorespiration due to absence
of photolysis in bundle sheath cells.
of photolysis in bundle sheath cells.
iii)
Rapid windrow of photosysthates
from the bundle sheath cells as they lie occur the vascular bundles.
Rapid windrow of photosysthates
from the bundle sheath cells as they lie occur the vascular bundles.
4)
Rubisco is an enzyme that acts
both as a carboxylase and oxygenize. Why do you think Rubio co carries out more
carboxylation in C4 plants?
Rubisco is an enzyme that acts
both as a carboxylase and oxygenize. Why do you think Rubio co carries out more
carboxylation in C4 plants?
Rubisco functions as oxygenize only
when there is higher cone of oxygen & lower cone of CO2. Both
the conditions do not occurs in Rubisco containing bundle sheath cells of C4
plants. They do not have photolytic evolution of oxygen they receive a regular
supply of CO2 even when the stomata are closed.
when there is higher cone of oxygen & lower cone of CO2. Both
the conditions do not occurs in Rubisco containing bundle sheath cells of C4
plants. They do not have photolytic evolution of oxygen they receive a regular
supply of CO2 even when the stomata are closed.