Photosynthetic Physiology of Blue, Green, and Red Light: Light Intensity Effects and Underlying Mechanisms.

ABSTRACT: Red and blue light are traditionally believed to have a higher quantum yield of CO₂ assimilation (QY, moles of CO₂ assimilated per mole of photons) than green light, because green light is absorbed less efficiently. However, because of its lower absorptance, green light can penetrate deeper and excite chlorophyll deeper in leaves. We hypothesized that, at high photosynthetic photon flux density (PPFD), green light may achieve higher QY and net CO₂ assimilation rate (A _n) than red or blue light, because of its more uniform absorption throughtout leaves. To test the interactive effects of PPFD and light spectrum on photosynthesis, we measured leaf A _n of "Green Tower" lettuce (Lactuca sativa</

SUBMITTER: Liu J 

PROVIDER: S-EPMC7977723 | biostudies-literature | 2021

REPOSITORIES: biostudies-literature