Summary
The earliest stage in the development of black pine seedlings have been viewed and assayed in the present correlative study, resulting in a morphological and biochemical description of several forms of plastids. With the exception of ungerminated embryo cotyledons, the plastids are recognized in five stages of seedling development. They progress from proplastids containing protochlorophyll which are located among protein and lipid bodies to the chlorophyll containing chloroplasts with well developed grana. The differentiation period was between the first and the forth day, when active metabolism started.
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Nikolić, D., Bogdanović, M. Plastid differentiation and chlorophyll synthesis in cotyledons of black pine seedlings grown in the dark. Protoplasma 75, 205–213 (1972). https://doi.org/10.1007/BF01279816
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DOI: https://doi.org/10.1007/BF01279816