Journal Article

Photosynthetic carbohydrate metabolism in the resurrection plant <i>Craterostigma plantagineum</i>

M. Norwood, M.R. Truesdale, A. Richter and P. Scott

in Journal of Experimental Botany

Published on behalf of Society for Experimental Biology

Volume 51, issue 343, pages 159-165
Published in print February 2000 | ISSN: 0022-0957
Published online February 2000 | e-ISSN: 1460-2431 | DOI: http://dx.doi.org/10.1093/jexbot/51.343.159
Photosynthetic carbohydrate metabolism in the resurrection plant Craterostigma plantagineum

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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.

Keywords: Craterostigma; resurrection plants; octulose; carbohydrate metabolism.

Journal Article.  4166 words.  Illustrated.

Subjects: Plant Sciences and Forestry

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