Abstract
The neutral sugars (glucose, fructose, and sucrose) and the sugar phosphates (glucose 6-phosphate, glucose 1-phosphate and fructose 6-phosphate) soluble in hot aqueous 80% methanol from the fibres of cotton — Gossypium arboreum L., G. barbadense L., and G. hirsutum L. — were determined at various stages of fibre development. In addition, the (1→3)-β-D-glucan content was measured and in the case of G. arboreum the rate of (1→3)-β-D-glucan and cellulose synthesis was determined with [14C]sucrose as the precursor. For each of the species a similar chronology was obtained for the changes in content of the various non-structural carbohydrates. At the early stages of secondary wall formation, glucose and fructose exhibited a maximum which was closely followed by a maximum in the (1→3)-β-D-glucan content and in the sugar phosphates. On the other hand, the sucrose content increased regularly until fibre maturity. The rates of synthesis of (1→3)-β-D-glucan and of cellulose were highest following the maximum in the (1→3)-β-D-glucan content, when the latter was being depleted.
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Abbreviations
- DMSO:
-
dimethyl-sulphoxide
- DPA:
-
days post anthesis
- UDP-glucose:
-
uridinediphosphoglucose
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Jaquet, JP., Buchala, A.J. & Meier, H. Changes in the non-structural carbohydrate content of cotton (Gossypium spp.) fibres at different stages of development. Planta 156, 481–486 (1982). https://doi.org/10.1007/BF00393321
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DOI: https://doi.org/10.1007/BF00393321