Intracellular transport and pathways of carbon flow in plants with crassulacean acid metabolism

Holtum, Joseph A.M., Smith, J. Andrew C., and Neuhaus, H. Ekkehard (2005) Intracellular transport and pathways of carbon flow in plants with crassulacean acid metabolism. Functional Plant Biology, 32 (5). pp. 429-449.

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The massive daily reciprocal transfer of carbon between acids and carbohydrates that is unique to crassulacean acid metabolism (CAM) involves extensive and regulated transport of metabolites between chloroplasts, vacuoles, the cytosol and mitochondria. In this review of the CAM pathways of carbon flow and intracellular transport, we highlight what is known and what has been postulated. For three of the four CAM pathway variants currently known (malic enzyme- or PEP carboxykinase-type decarboxylase, and starch- or soluble sugar-type carbohydrate storage), the mechanisms of intracellular transport are still hypothetical and have yet to be demonstrated experimentally. Even in malic enzyme starch-storing species such as Kalanchoë daigremontiana Hamet et Perr. and Mesembryanthemum crystallinum L., the best-described variants of plants with the second-most common mode of photosynthetic carbon metabolism known, no tonoplast or mitochondrial transporter has been functionally described at a molecular level.

Item ID: 1142
Item Type: Article (Research - C1)
ISSN: 1445-4416
Keywords: CAM; photosynthetic carbon metabolism; plant metabolite transport
Date Deposited: 19 Dec 2010 23:01
FoR Codes: 06 BIOLOGICAL SCIENCES > 0607 Plant Biology > 060705 Plant Physiology @ 100%
SEO Codes: 97 EXPANDING KNOWLEDGE > 970106 Expanding Knowledge in the Biological Sciences @ 100%
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