Photosynthetic carbohydrate metabolism in the resurrection plant Craterostigma plantagineum

Norwood, M, Truesdale, M R, Richter, A and Scott, P (2000) Photosynthetic carbohydrate metabolism in the resurrection plant Craterostigma plantagineum. Journal of Experimental Botany, 51 (343). pp. 159-165. ISSN 0022-0957

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The resurrection plant Craterostigma plantagineum (Hochst) is able to survive almost complete tissue dehydration when water is withheld from it, and then can rehydrate rapidly on rewatering. This ability is believed to be the result of the accumulation of sucrose in aerial tissues as a result of metabolism of 2‐octulose. In this work the metabolic activity of well‐watered Craterostigma plantagineum plants has been investigated. It is shown that Craterostigma makes raffinose series oligosaccharides as a product of photosynthesis and translocates them in the phloem. Evidence is also provided that 2‐octulose is a product of photosynthesis and accumulates in the leaves over the light period and is mobilized at night. Thus 2‐octulose acts as a temporary storage carbohydrate in leaves during photosynthesis in a similar fashion to starch in most C3 plants. Other potential roles of 2‐octulose are discussed. Other than these observations Craterostigma plants are very similar to other C3 plants under these conditions.

Item Type: Article
Keywords: Craterostigma; resurrection plants; octulose; carbohydrate metabolism
Schools and Departments: School of Life Sciences > Biology and Environmental Science
Depositing User: Peter Scott
Date Deposited: 06 Feb 2012 19:15
Last Modified: 19 Sep 2012 09:46
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