Summary
The development of peripheral reticulum (PR) in chloroplasts varies in C3 and C4 plants. In general, PR is more extensive in C4 plants, but PR is also seen in the chloroplasts of some C3 plants. Within some C4 plants, PR is seen in the bundle sheath cells which predominantly use the C3 pathway. Thus, PR is not associated directly with the presence of the C4 pathway on a cellular basis. Its predominance in C4 plants must be related to some characteristic other than the method of CO2 fixation. Ultrastructural evidence suggests that PR is associated with the rapid transfer of substances into and out of chloroplasts and from mesophyll to bundle sheath cells.
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Cooperative investigations of the Department of Agronomy, University of Georgia, Athens, Georgia; Department of Agronomy, University of Florida, Gainesville, Florida; and the Plant Science Research Division, Agricultural Research Service, USDA, Gainesville, Florida. The mention of specific products is for the purpose of clarity and does not imply endorsement by the USDA. Journal Series No. 977 of the Georgia Agricultural Experiment Station, and Journal Series No. 3870 of the Florida Agricultural Experiment Station.
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Gracen, V.E., Hilliard, J.H., Brown, R.H. et al. Peripheral reticulum in chloroplasts of plants differing in CO2 fixation pathways and photorespiration. Planta 107, 189–204 (1972). https://doi.org/10.1007/BF00397935
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DOI: https://doi.org/10.1007/BF00397935