Asian Journal of Research in Botany

Impact of Light Wavelengths on Photosynthetic Rates in Spinach

Owen R. Thornton *

Department of Psychology and Neuroscience, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.

Cynthia Tran

Department of Psychology and Neuroscience, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.

Wenjun Li

Adams School of Dentistry, University of North Carolina, Chapel Hill, Chapel Hill, NC, USA.

*Author to whom correspondence should be addressed.

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Abstract

In this study, we investigated the effects of different light wavelengths, specifically red, blue, and green light, on the rate of photosynthesis in plants. Transmittance rates were collected at three-minute intervals over a nine-minute duration, and the photosynthetic rates were calculated for each wavelength. Our findings revealed that the red light wavelength resulted in a higher rate of photosynthesis (2.14%) compared to blue (1.57%) and green light (1.81%). Interestingly, the control group, which represented white light, exhibited the highest rate of photosynthesis at 2.31%. These results suggest that red light is more effective in promoting photosynthesis than blue or green light, and white light may be even more efficient. This information is crucial for understanding optimal growth conditions for plants, particularly in controlled environments such as indoor farms, where light wavelengths can be manipulated to maximize growth rates and crop yields. Further research should focus on comparing the effects of red, white, and other light wavelengths on photosynthesis to determine the most effective wavelength for plant growth and to explore potential synergistic effects of different light combinations.

Keywords: Photosynthesis, light wavelengths, red light, indoor farming, plant growth

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