Histological features and dynamics of the development of watercore in apple (Malus domestica) fruit
T. Suzuki, Y. Sasaki, K. Kuroda, K. Oosawa
ISHS Acta Horticulturae 628:495-500
2003
บทคัดย่อ
In order to clarify the mechanism of water core development in apple fruit, changes in the development of watercore in fruit of three cultivars, either on trees or stored at 2 °C after harvest, were examined. The water core developed in fruit of 'Koutoku' and 'Redgold', but not in 'Mutsu'. Formation of the water core was first confirmed in mid-October. The size of the water core was maximum at harvest time, then reduced gradually in stored fruit. Tissues of the fresh fruit were observed with a cryo-scanning electron microscope (Cryo-SEM), with which samples can be observed without dehydration. The Cryo-SEM image showed that all the intercellular spaces were filled with ice crystals (aqueous fluid) in the water core tissue, but not in the non-water core area. Water core tissue seems to be formed with aqueous fluid overflow in the apoplast just before harvest.