Tissue- and organ specific plastid differentiation in various plant species

Plastid differentiation and the greening process are usually studied in etiolated leaves. In this work, we studied stems or stem related organs of various plant species. Electron microscopy studies combined with fluorescence spectroscopy showed the formation of protochlorophyllide forms similar to those of etiolated leaves but their ratio had a big variation, even more in different tissues of the same organ. In a series of measurements, we proved that etiolation conditions can occur in the nature in closed cabbage head or inside closed leaf buds