Effect of Light Intensity on the Rate of Apparent Photosynthesis in Coffee Leaves

Abstract

The rate of apparent photosynthesis relative to light intensity was determined for Bourbon variety of Arabica coffee. A curve for the effect of light-saturation on apparent photosynthesis of coffee showed that saturation was reached at a maximum of 2,000 foot-candles and that maximum apparent photosynthesis was maintained up to 6,000 foot-candle intensity, after which it decreased. Evidence is also presented to demonstrate that high light intensities may cause an impairment of the photosynthetic activity.