The Location of Carotenoid Pigments and Thickness of The Cell Wall In Light- and Dark-Grown Cells of Dacryopinax Spathularia

SUMMARY

Light-grown cells of Dacryopinax spathularia contained almost eight times the concentration of carotenoid pigments as did dark-grown cells. That the highest concentration of pigments occurred in the cell walls was demonstrated by a cytological study employing antimony trichloride as a stain, and by analysis of cell fractions following sonication and differential sedimentation. Electron microscopy showed that the cell walls of light-grown cells were between 1.5 and 1.9 times as thick as those of dark-grown cells.