| Autor: |
Sowokinos, J. R., Orr, P. H., Knoper, J. A., Varns, J. L. |
| Zdroj: |
American Journal of Potato Research; May 1987, Vol. 64 Issue: 5 p213-226, 14p |
| Abstrakt: |
Mechanical handling of Norchip (cv.) potatoes resulted in sucrose concentrations that exceeded 1% (fresh wt basis) 10 days after treatment. More than 65% of the maximal sugar accumulation occurred within 5 days of handling. Potatoes increased in their ability to produce sucrose as storagetime increased. Sucrose accumulation in response to handling stress was not mediated via gross physical disruption of the amyloplast membrane. Electron micrographs indicated that starch granules of both handled and control potatoes were surrounded by intact and continuous plastid (amyloplast) membranes throughout the major portion (1 to 8 months) of the storage season (8.9 C). Glucose levels did not increase at a similar rate compared to changes in sucrose concentration. Results suggest that the majority of the sucrose, which occurred during storage and/or handling stress, was not efficiently converted to reducing sugars via the enzyme invertase. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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