Botany - Photosynthesis in Higher Plants Question with Solution | TestHub

Effect of Light on Photosynthesis

- Effect of light is categorized under light quality, light intensity and the duration of exposure to light.

- At low light intensities, there is a linear relationship between incident light and CO₂fixation rates.

- At higher light intensities, the rate gradually does not show further increase as other factors become limiting.

- Light saturation occurs at 10 % of the full sunlight. Thus, light is rarely a limiting factor in nature

(except for plants in shade or in dense forests).

- Incident light beyond a point causes the breakdown of chlorophyll and a decrease in photosynthesis.