Summary
(1) It is shown that in the chloroplasts ofChlamydomonas andAnthoceros thick, dense lamellae and thin, less dense lamellae alternate. (2) In the chloroplasts of many phanerogame plants with grana, thin less dense lamellae limit the parcel of thick grana-lamellae above and below. Since the differentiations 1 and 2 are present in the photographs of many publications (although not mentioned), it is suggested that this kind of lamellarmodel has often been overlooked until now. — The « Kristallgitterstruktur » has been found in a cryptogamous plant,Selaginella, in young chloroplasts, for the first time. The connection between the elementary particles of the crystal-lattice and the young lamellae has been verified again. — The possibility of formation of double lamellae by fusion of blastulae or tubuli is discussed in detail.
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Heitz, E. Zur Kenntnis des lamellaren Musters in ausgewachsenen und der Kristallgitterstruktur in jungen Chloroplasten. Experientia 16, 265–270 (1960). https://doi.org/10.1007/BF02157667
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DOI: https://doi.org/10.1007/BF02157667