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Web URL(s): | http://www.jstor.org/stable/pdfplus/2432660.pdf?acceptTC=true Last checked: 10/18/2013 Requires: PDF Reader Access conditions: Item is within a limited access website http://www.jstor.org/stable/view/2432660 Last checked: 10/18/2013 Access conditions: Item is within a limited access website |
Publication Type:
| Refereed |
Author(s): | Borland, A. M.;
Farrar, J. F. |
Author Affiliation: | School of Plant Biology, University College of North Wales, Bangor, Gwynedd, UK |
Title: | Diel patterns of carbohydrate metabolism in leaf blades and leaf sheaths of Poa Annua L. and Poa x Jemtlandica (ALMQ.) Richt |
Source: | New Phytologist. Vol. 100, No. 4, August 1985, p. 519-531. |
Publishing Information: | Oxford, England, United Kingdom: Blackwell Publishing, for the New Phytologist Trust |
# of Pages: | 13 |
Related Web URL: | http://www.jstor.org/stable/info/2432660 Last checked: 10/18/2013 Notes: Abstract only |
Keywords: | TIC Keywords: Carbohydrate concentration; Gas exchange; Growth analysis; Metabolism; Poa annua; Sucrose
|
Abstract/Contents: | "A study was made of diel changes in carbohydrate content, net gas exchange and export from leaf blades and leaf sheaths in Poa annua L. (a ruderal) and Poa x jemtlandica (Almq.) Richt. (a sub-arctic grass). Sucrose was the most abundant form of carbohydrate in the leaf blades with lesser amounts of starch and fructans also present. The proportions of fixed carbon allocated to export, storage and respiration in leaf blades were similar, and carbohydrates showed broadly similar patterns of diel fluctuation, in both species. However, the relative rates of sucrose and starch accumulation and depletion and the diel patterns of export in the leaf blades were different in the two species. Starch was the predominant form of carbohydrate in the sheath, with soluble sugars and fructans also present. Starch and soluble sugars showed diel accumulation and depletion in the sheaths of Poa annua but not in Poa x jemtlandica. The effects of extended darkness suggest that factors controlling carbohydrate metabolism in the sheath may be different to those operating in the leaf blade. The large fluxes of carbohydrate through the sheath suggest that it serves mainly as a thoroughfare for carbohydrates." |
Language: | English |
References: | 25 |
Note: | Summary as abstract Tables Graphs |
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete): Borland, A. M., and J. F. Farrar. 1985. Diel patterns of carbohydrate metabolism in leaf blades and leaf sheaths of Poa Annua L. and Poa x Jemtlandica (ALMQ.) Richt. New Phytol. 100(4):p. 519-531. |
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| Web URL(s): http://www.jstor.org/stable/pdfplus/2432660.pdf?acceptTC=true Last checked: 10/18/2013 Requires: PDF Reader Access conditions: Item is within a limited access website http://www.jstor.org/stable/view/2432660 Last checked: 10/18/2013 Access conditions: Item is within a limited access website |
| MSU catalog number: b2219226 |
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