With reference to factors affecting the rate of photosynthesis, which of the following statements is not correct?
1
Tomato is a greenhouse crop which can be grown in CO2 - enriched atmosphere for higher yield
2
Light saturation for CO2 fixation occurs at 10% of full sunlight
3
Increasing atmospheric CO2 concentration upto 0.05% can enhance CO2 fixation rate
4
C3 plants responds to higher temperatures with enhanced photosynthesis while C4 plants have much lower temperature optimum