Supercooling characteristics of some deciduous fruit trees as related to water movement within the bud

作者：Seongjoo Kang, H. Motosugi, Keizo Yonemori, Akira Sugiura · 发表于：The Journal of Horticultural Science and Biotechnology · 年份：1998 · DOI：10.1080/14620316.1998.11510960 · 被引用次数：38 · 研究领域：Plant Physiology and Cultivation Studies、Postharvest Quality and Shelf Life Management、Horticultural and Viticultural Research

SummaryTo characterize and identify the freezing resistance mechanism of some deciduous fruit trees, woody stem and dormant buds of apple (Malus domestica ‘Tsugaru’), grape (Vitis labruscana ‘Muscat Bailey A’), peach (Prunus persica ‘Shimizu Hakuto’), Japanese pear (Pyrus pyrifolia ‘Nijisseiki’), and persimmon (Diospyros kaki ‘Hiratanenashi’) were used in the following experiments. On thermal analysis (TA), the woody stem tissues or the buds with woody stem tissue of all fruit trees used showed two exotherms, the high temperature exotherm (HTE) and the low temperature exotherm (LTE). The flower buds without woody stem tissue of peach and pear also had two exotherms, the HTE and LTE, and the LTE temperatures coincided with the LT50S of flower buds although the detection frequency of LTE in pear was considerably lower (<10%). Furthermore, in peach and pear, the LTE of buds without woody stem tissue and the LT50 of flower buds on woody stem were cooling-rate dependent, and those temperatures fell with a decrease in cooling rate. Water migration from the flower primordia of both buds to the surrounding tissues was also observed during freezing. In apple, although the LTE of bud without woody stem tissue was not detected in our experiment, the LT50 of the bud was cooling-rate dependent, and water migration from the primordia to the other tissues in bud was observed during freezing. These facts indicate that the mechanisms of freezing tolerance in apple flower buds are the same as ...