Stomatal Responses to Light, CO₂, and Mesophyll Tissue in Vicia faba and Kalanchoe fedtschenkoi.

ABSTRACT: The responses of stomatal aperture to light intensity and CO₂ concentration were studied in both Vicia faba (C₃) and Kalanchoë fedtschenkoi (Crassulacean acid metabolism; CAM), in material sampled from both light and dark periods. Direct comparison was made between intact leaf segments, epidermises grafted onto exposed mesophyll, and isolated epidermal peels, including transplantations between species and between diel periods. We reported the stomatal opening in response to darkness in isolated CAM peels from the light period, but not from the dark. Furthermore, we showed that C₃ mesophyll has stimulated CAM stomata in transplanted peels to behave as C₃ in response to light and CO₂. By using peels and mesophyll from plant

SUBMITTER: Santos MG 

PROVIDER: S-EPMC8579043 | biostudies-literature | 2021

REPOSITORIES: biostudies-literature