Studies on the coloration of tomato fruits. IX.
Relationship between respiration and coloring of fruits
1963 Volume 32 Issue 1 Pages 63-64
Details
1963 Volume 32 Issue 1 Pages 63-64
An experiment was carried out to ascertain relationship between respiration and coloring of fruit using the variety Mitsuoka in 1960 and 1961 at Faculty of Agriculture, Shinshu University. Fruits were harvested on the 30th, 38th, 47th, 52th and 58th day after flowering in 1960, and 25th, 33th, 37th, 41th and 43th day after flowering in 1961. Also, the fruits harvested on the 39th day after flowering in 1961 were stored at room temperature (22-25°C), 30°C and 35°C, respectively. Furthermore, the fruits harvested on the 40th day after flowering were stored with oxygen (21%) and carbon dioxide (1%) for 10 days.
1. The respiratio rate of fruits decreased from immature stage to green mature stage and increased from green mature stage to mature stage. The climacteric peak of respiration rate was formed when the whole parts of fruit was colored, and the respiration rate was decreased thereafter. The increase and decrease of respiration rate in the fruit were closely connected with chlorophyll and carotenoid pigments of fruits.
2. On the relation of storage temperature to respiration rate of fruits, fruits stored at room temperature (22-25°C) were higher in climacteric peak than those stored at 30°C or 35°C, but when harvested at immature stage, fruits stored at 30°C and 35°C had higher respiration rates than those stored at room temperature. On the pigment contents of mature fruits, fruits stored at room temperature has a large lycopene content, and those stored at 35°C were scarce in lycopene and appeared yellow. Fruits stored at 30°C were mediate between room temperature and 35°C.
3. On the fruits stored with oxygen or carbon-dioxide, respiration rates was inhibited more strongly in the latter fruits than in the former. Accordingly, the pigment contents of fruits stored in carbon-dioxide were less than those of oxygen storage fruits. Especially, at the end of storage, there was a remarkable difference between the two treatments.
