Fig. 4From: Cell organelles and fluorescence of parenchyma cells in Eucalyptus bosistoana sapwood and heartwood investigated by microscopyFluorescence emission spectra from sapwood and heartwood sections using 405 nm excitation (a, b) and 488 nm (c, d) of fibre cells (a, c) and parenchyma cells (b, d). Heartwood spectra were shifted to slightly longer wavelengths, most noticeably for the parenchyma cells, indicating the presence of heartwood extractivesBack to article page