In this study data are presented on the morphological changes related to rest as the latter is measured by sprout and root production. Bulb growth and development are described for field-grown plants, and changes in bulbs leading to rooting and sprouting are followed during curing and during storage at several temperatures. The capacity of bulbs to root and sprout was measured by removing samples from storage to conditions favorable to bulb growth. Cell divisions in the stem apex were observed during curing and under several storage conditions, to relate stem growth to sprouting. The findings are presented in relation to the practice and problems of onion bulb storage.
