What is a disadvantage of C4 photosynthesis?
The drawback to C4 photosynthesis is the extra energy in the form of ATP that is used to pump the 4-carbon acids to the bundle sheath cell and the pumping of the 3-carbon compound back to the mesophyll cell for conversion to PEP.
Why C4 photosynthesis is advantageous in hot dry conditions?
The C4 plants have a specialised mechanism of photosynthesis to increase efficiency. They lack photorespiration. Carbon dioxide is first fixed in the mesophyll cells and then the 4-carbon organic acid is transported to bundle sheath cells.
What does C4 photosynthesis prevent?
C4 Photosynthesis is for Plants Adapted to Hot Environments Carbon dioxide is converted into an acid and transported into the bundle sheath cells where it will be converted back into CO2. This keeps the concentration high where RuBisCO is active, preventing photorespiration.
What are the advantages of C4 photosynthesis?
Plants that perform C4 photosynthesis can keep their stomata closed more than their C3 equivalents because they are more efficient in incorporation CO2. This minimizes their water loss.
What happens during C4 photosynthesis?
In C4 photosynthesis, where a four-carbon compound is produced, unique leaf anatomy allows carbon dioxide to concentrate in ‘bundle sheath’ cells around Rubisco. This structure delivers carbon dioxide straight to Rubisco, effectively removing its contact with oxygen and the need for photorespiration.
Why do C4 plants have tolerate high temperatures?
The increased temperature optimum for Pn of C4 versus C3 plants can be attributed to the CO2-concentrating system of C4 plants, which compensates for Rubisco inactivation by increasing the CO2 level around Rubisco.
What makes C4 photosynthesis more efficient?
C4 plants are more efficient than C3 due to their high rate of photosynthesis and reduced rate of photorespiration. The main enzyme of carbon fixation (Calvin cycle) is RuBisCO. When carbon dioxide concentration is low, RuBisCO takes up oxygen to perform photorespiration.
Do C4 plants produce oxygen?
Yes, C4 plants produce oxygen, the difference lies in the carbon fixation pathway.
What is incorrect for C4 plants?
Among the given options, option (d) is incorrect about C4-plants. The mesophyll cells of C4-plants do not possess RuBisCO enzyme. The primary acceptor of CO2 is Phosphoenol Pyruvate or PEP. It combines with CO2 in the presence of PEP carboxylase or PEPCase to form oxaloacetic acid or oxaloacetate.
Why photosynthesis in C4 plants is more efficient?
C4 plants are more efficient than C3 due to their high rate of photosynthesis and reduced rate of photorespiration. When carbon dioxide concentration is low, RuBisCO takes up oxygen to perform photorespiration.