On bulb formation and dormancy in onion. IV

This paper reports the results of the influence of storage temperature on the sprouting of stored onion. (1) High temperature (above 28°C) in storage inhibited remarkably the growth of inner scals of onion and delayed sprouting, but high temperature promoted breaking of dormancy so markedly, that the storage under high temperature followed by ordinary temperature accelerated the sprouting. (2) It seemed that low temperature neither breaked nor prolonged the rest period of onion bulbs, but it clearly inhibited the growth of inner scales, and made their sprouting delayed. (3) The relation of season of harvest to sprouting in stored onion, and requirements of stored temperature for onion are discussed.