Q.
During photosynthesis, light saturation is observed at _________ of full sunlight.
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NTA AbhyasNTA Abhyas 2020Photosynthesis in Higher Plants
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Solution:
There is a linear relationship between incident light and CO2 fixation rates at low light intensities. At higher light intensities, gradually the rate does not show further increase as other factors become limiting. Light saturation occurs at 10 per cent of the full sunlight. Hence, except for plants in shade or in dense forests, light is rarely a limiting factor in nature. Increase in incident light beyond a point causes the breakdown of chlorophyll and a decrease in photosynthesis.