ADVERTISEMENTS:

ADVERTISEMENTS:

The upcoming discussion will update you about the difference between c3 plants and c4 plants.

Difference # C3 Plants:

1. CO2 acceptor is RuBP (Ribulose bisphosphate).

2. Only one type of chloroplasts occur in the cells. Grana present in chloroplasts.

ADVERTISEMENTS:

3. First stable compound after CO2 fixation is PGA.

4. Plants photosynthesize well, if CO2 concen­tration is high.

5. They possess photorespiration that results in a low overall efficiency in synthesis of carbo­hydrates.

6. Excess of atmospheric oxygen inhibits photo­synthetic activity.

Difference # C4 Plants:

ADVERTISEMENTS:

1. CO2—acceptor is PEP (Phosphoenol pyruvate).

2. Two types of chloroplasts, bundle sheath chlo­roplasts possess C3 cycle (Calvin cycle) and do not have grana; and mesophyll chloroplasts pos­sess C4 cycle (Hatch Slack cycle), and have grana.

3. First stable compound after CO2 fixation is oxaloacetate.

4. Plants synthesize well, even if CO2 concentra­tion is low.

5. They lack photorespiration and conserve more or­ganic food and thus an overall higher photosyn­thetic efficiency.

6. Excess of atmospheric oxygen has no effect on photosynthesis.