Abstract
Cell organelles were isolated from the CAM plants Crassula lycopodioides Lam., Bryophyllum calycinum Salisb. and Sedum rubrotinctum R.T. Clausen by isopycnic centrifugation in sucrose gradients. The inclusion of 2.5% Ficoll in the grinding medium proved to be essential for a satisfactory separation of cell organelles during the subsequent centrifugation. Peroxisomes, mitochondria, and whole and broken chloroplasts were at least partially resolved as judged by marker-enzyme-activity profiles. The isolated peroxisomes contained activities of glycollate oxidase, catalase, hydroxypyruvate reductase, glycine aminotransferase, serine-glyoxylate aminotransferase, and aspartate aminotransferase, comparable to activities found in spinach (Spinacia oleracea L.) leaf peroxisomes. In contrast to spinach, however, only little, if any, particulate malate dehydrogenase activity could be attributed to isolated peroxisomes of the three CAM plants.
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Herbert, M., Burkhard, C. & Schnarrenberger, C. Cell organelles from crassulacean-acid-metabolism (CAM) plants. Planta 143, 279–284 (1978). https://doi.org/10.1007/BF00391999
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DOI: https://doi.org/10.1007/BF00391999