Fern Strobilus Thin Section
G-1B Longpass Emission (Narrow Bandwidth Excitation) Green Set
Autofluorescence emission intensity from a thin section of fern strobilus (Cyrtomium falcatum) tissue. Endogenous autofluorescence in plant tissues arises from a variety of biomolecules, including chlorophyll, carotene, and xanthophyll. In the green excitation region, chlorophyll has an absorption band with a low extinction coefficient, but still produces a detectable level of fluorescence at emission wavelengths of 550 nanometers and above (green, yellow, orange, and red).