Effects of Ultraviolet Light Elimination on Pigmentation in Allium x wakegi and Shallot (Allium cepa aggregatum group) Bulbs

抄録

Effects of UV light elimination on the flavonoid content in the bulbs of Allium x wakegi and shallots (Allium cepa aggregatum group) were investigated. The mean anthocyanin content was about 16% less under UV cut-off films, eliminating < 360 and < 390 nm of the sunlight than under the film transmitting UV light (control). Changes in the anthocyanin content by the UV light elimination were accession dependent. Flavonols were relatively more stable than anthocyanins under the UV cut-off films and did not statistically show any difference between the treatments. The change of anthocyanin content under UV cut-off film did not definitely follow the change of flavonol content. It was clarified that UV light eliminating treatment given to the leaves decreased the anthocyanin content in the bulbs which were not directly exposed to the light.