Question

How does rising CO2 concentration and global temperature affect different aspects of plants growth.

Answer 1

Carbondioxide and global temperature are key variables in  plant growth development and function. The rising carbondioxide concentration and global temperature affects different aspects of plant growth.

Rising CO2 concentration causes,

- Increase in yield by increasing the rate of photosynthesis.

- As CO2 levels increase, the stomatal pores donot open as wide, rresulting in lower levels of transpiration by plants and thus increase Water Use Efficiency/ WUE.

- Increases biomass- plant dry weight

- Increased tolerance for low light levels

- produce more number of mesophyll cells and chloroplast.

- Increased leaf area, leaf area duration

- Reduce crop damage from insects and pathogenic insects.

- Accumulates non structural carbohydrates on plant parts.

The rising global temperature causes,

- photosynthesis is unaffected or increased slightly at high temperatures.

- Increased accumulation of foliar sucrose and decreased starch accumulation in mature leaves.

- cause stunting and death of plants

- Reduced metabolic activity when temperature rises above 40 degree celsius.

- Transpiration and respiration rises.

- Affect proteins and enzymes.

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