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Freezing Hardiness According to Dormancy Level and Low Temperature in Persimmon (Diospyros kaki)  

Kim, Ho-Cheol (Division of Horticulture and Pet Animal-Plant Science, Wonkwang University)
Bae, Kang-Soon (Iksan Branch of National Seed Management Office)
Bae, Jong-Hyang (Division of Horticulture and Pet Animal-Plant Science, Wonkwang University)
Kim, Tae-Choon (Division of Horticulture and Pet Animal-Plant Science, Wonkwang University)
Publication Information
Journal of Bio-Environment Control / v.16, no.3, 2007 , pp. 269-273 More about this Journal
Abstract
Freezing hardiness of winter bud and branch according to dormancy level and low temperature, in persimmon (Diospyros kaki) cultivars, was investigated by electrolyte leaching rate, triphenyltetrazolium chloride (TTC) test, and sprouting. Electrolyte leaching rate was lowest in branch of 20th January and was highest in the 20th March. The electrolyte leaching rate of 'Fuyu' and 'Cheongdobansi' was high in the 20th January and was low in the 20th February, but 'Uenishiwase' and 'Nishimurawase' was opposed to that. 'Hachiva' was the middle level in the cultivars. Absence rate by TTC test was highest in the 20th January and was low in the others. The 20th March had a great decrease in $-10^{\circ}C$ treatment. The absence rate of 'Fuyu' and 'Uenishiwase' was low in the 20th January and March and was high in the 20th February. 'Nishimurawase' and 'Hachiya' had a high level irrespective of dormancy level. Sprouting was highest in the 20th February and was lowest in 20th March. Most cultivars were not sprout in $-20^{\circ}C$ treatment and 'Fuyu', 'Nishimurawase' and 'Cheongdobansi' was a little high level irrespective of dormancy level. 'Hachiya' was only high in the 20th January. Thus, freezing hardiness of persimmon was very weak low temperature after dormancy breaking and was not different between astringent and non-astringent persimmon.
Keywords
electrolyte leaching rate; freezing hardiness; sprouting; triphenyltetrazolium chloride (TTC) test;
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