Freezing Resistance and Carbohydrate Composition of 'Floratam' St. Augustinegrass
| Autor: | J.D. Fry, N.S. Lang, R.G.P. Clifton |
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| Rok vydání: | 1991 |
| Předmět: | |
| Zdroj: | HortScience. 26:1537-1539 |
| ISSN: | 2327-9834 0018-5345 |
| DOI: | 10.21273/hortsci.26.12.1537 |
| Popis: | `Floratam' St. Augustinegrass [Stenotaphrum secundatum (Walt.) Kuntze] stolons were sampled from the field between October and March to determine potential changes in lethal low temperatures and nonstructural carbohydrate composition. Lethal temperatures determined by electrolyte leakage ranged from – 6.1 to – 5.3C. Little variability in lethal temperatures over sampling dates indicated that `Floratam' St. Augustinegrass did not readily acclimate to cold temperatures. Starch was the carbohydrate present in highest concentration in `Floratam' stolons, with levels ranging from 7.7 to 12.4 mg/100 mg dry weight. Sucrose concentrations varied from 2.4 to 5.7 mg/100 mg dry weight. Glucose and fructose were also present in `Floratam' stolons at lower concentrations. A slight increase in sucrose and decrease in starch were observed between November and December, when low temperatures resulted in chlorophyll loss and turf was |
| Databáze: | OpenAIRE |
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