ISHS Acta Horticulturae 553: IV International Conference on Postharvest Science
A SIMPLE METHOD TO MONITOR ONION BULB DORMANCY |
| Author: | G. Bufler |
| Keywords: | Allium cepa L., onion, bulb dormancy, sprouting |
| Abstract:
Dormancy is an important factor in the storability of onion bulbs. It starts at about the time foliage is lodging (Komochi, 1990). Dormancy can be described as non-growth of sprout leaves, whereas sprouting is accelerated growth of sprout leaves. Sprout leaves of onion bulbs comprise a leaf sheath and a leaf blade. During initial sprout growth only the leaf blade is elongates, but not the leaf sheath (Bufler, unpublished; De Mason, 1990). Therefore, if sprout leaves with a defined leaf sheath length are monitored during dormancy, detection of an increase of the leaf-blade length will indicate initial sprout growth. Based on this principle, dormancy of a short-storing and a long-storing onion cultivar will be compared. | |
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