Abstract
Ultrastructural studies of the chloroplasts of the normal, yellow-green, and pale green phenotypes of Zea mays L. indicate that the internal membrane system is continuous with the plastid envelop. The intramembraneous spaces, loculi, and fret channels are also continuous with inner component of the plastid envelop. High energy compounds or other photosynthates, formed in the grana or frets are thus separated from both stroma and cytoplasm by a single membrane, either the fret membrane or the outer component of the plastid envelop. Since this type of plastid ultrastructure is apparently found only in plants exhibiting the Hatch and Slack pathways of photosynthesis there may be a relation between plastid ultrastructure and the pathways of photosynthetic carbon fixation.
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- Hatch M. D., Slack C. R. Photosynthesis by sugar-cane leaves. A new carboxylation reaction and the pathway of sugar formation. Biochem J. 1966 Oct;101(1):103–111. doi: 10.1042/bj1010103. [DOI] [PMC free article] [PubMed] [Google Scholar]
- REYNOLDS E. S. The use of lead citrate at high pH as an electron-opaque stain in electron microscopy. J Cell Biol. 1963 Apr;17:208–212. doi: 10.1083/jcb.17.1.208. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Weier T. E., Engelbreicht A. H., Harrison A., Risley E. B. Subunits in the membranes of chloroplasts of Phaseolus vulgaris, Pisum sativum, and Aspidistra sp. J Ultrastruct Res. 1965 Aug;13(1):92–111. doi: 10.1016/s0022-5320(65)80091-0. [DOI] [PubMed] [Google Scholar]