Abstract
(1) Some experiments were carried out on the chemical changes in bulbs or corms which were waking from the rest period due to the cold storage. The materials used in these experiments were gladioli (summer flowering), tulips and others, and these were stored in low temperature in 5°C or below.
(2) Taking as an example, the sucrose show a tendency to increase and the starch decrease in gladiolus in comparison with the control when the corms were stored in 5°C for 20-30 days. But the opposite result was showed according to inquality of the materials.
(3) There is a tendency of the decrease of the sucrose following the course of days when gladiolus was held in 20°C and high humidity by means of artificial method, but the difference is few. The reducing sugars was not found in the non-warmed section in spite of the course of 30 days. In 20 days warmed section, some reducing and nonreducing sugar was found. 10 days warmed section did not show the reducing sugar.
(4) Total nitrogen, crude protein of tulips and freesias which were stored in low temperature decrease as compared with the control, but gladiolus is not so. It seems that this is cause of tight rest period after digging of corms. Because gladiolus is spring-planting corms.
