Studies on the control and physiology of bulb formation and dormancy of Allium x wakegi Araki
Bulletin of the National Institute of Vegetable and Tea Science 2: 139-211
A. wakegi is eaten as a leaf vegetable in Japan and the marketability of plants with swollen bulbs is very low. Bulb formation and dormancy are therefore major factors which disrupt the year-round production of A. wakegi. A new technique was developed for preventing bulb formation on the basis of bulbing response to red/far-red light ratio. Covering with far-red-intercepting film clearly inhibited the bulb formation of plants grown in summer. However, the effect of far-red light interception was less pronounced in spring than in summer, which was due to the exposure to low temperature during winter. Low temperature enhanced the sensitivity of the plants to long days, a bulb-inducing stimulus.