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Aminoethoxyvinylglycine 및 열처리가 ‘후지’ 사과의 CA 저장 동안 과실품질에 미치는 영향
권헌중(Hun-Joong Kweon),김목종(Mok-Jong Kim),이진욱(Jinwook Lee),윤태명(Tae-Myung Yoon),강인규(In-Kyu Kang) 한국원예학회 2012 원예과학기술지 Vol.30 No.5
This study was carried out to investigate the effects of aminoethoxyvinylglycine (AVG) application and heat treatment on fruit quality of ‘Fuji’ apples during CA storage. AVG (75 mgㆍL<SUP>-1</SUP>) was applied to Fuji tree at 150 and 175 days after full bloom (DAFB) and the fruit were harvested at 185, 195, and 205 DAFB, respectively. Respiration rate and ethylene production of fruit applied with AVG were greatly reduced more than those in control. Flesh firmness and acidity of fruit applied with AVG were higher than those in control. Flesh browning occurred in all of the control fruit regardless of harvest date. However, AVG-treated fruits were free of flesh browning except for late harvested fruits. At 185 DAFB, ‘Fuji’ apples were harvested and prestorage heat treatment was done for 3 days at 38℃ and 6 hours at 46℃. Heat treatment at 38℃ and 46℃ prior to CA storage greatly reduced respiration rate and ethylene production. The incidence of flesh browning were 35%, 14%, and 5%, in control fruit, heating at 38℃ and 46℃, respectively. The titratable acidity was lower at heated apple than at controlled one.
국내 사과 주요 품종들의 자발휴면 타파에 필요한 저온요구도
권헌중(Hun-Joong Kweon),사공동훈(Dong-Hoon Sagong),송양익(Yang-Yik Song),박무용(Moo-Yong Park),권순일(Soon-Il Kwon),김목종(Mok-Jong Kim) 한국원예학회 2013 원예과학기술지 Vol.31 No.6
The study was carried out to examine the initial point of dormancy, breaking time of internal dormancy, and to find out the accumulated hours of low temperature (under 7.2°C from 0.0°C to 7.2°C) for bud-breaking. Over-all, the chilling requirement for breaking of internal dormancy in the commercial apple cultivars (‘Fuji’ and ‘Tsugaru’) and apple cultivars bred in Korea (‘Hongro’, ‘Sunhong’, ‘Honggeum’, ‘Hongan’, ‘Hongso’, ‘Gamhong’, ‘Summer dream’) at the Gunwi region for 4 years (from 2009 to 2012) was investigated. Also, the breaking time of internal dormancy in the field at the Gunwi region and the breaking time of dormancy if air temperature of Gunwi region rises 4°C higher than the current one were investigated using the same data. The initial point of dormancy was set at the time when the lateral bud breaking did not occurred (when heading back cutting was done in the middle of terminal shoots). The occurrence of the breaking of internal dormancy was decided if the breaking of the terminal bud of bourse shoot occurred within 15 days or not in growth chamber. About 100 bourse shoots were collected by cultivar classification in early December every year and were stored at 5.0°C, and they were placed in growth chamber at one week interval. The chilling requirement of cultivars was expressed in accumulated hours in the field and in the growth chamber under 7.2°C and 0.0-7.2°C from the initial point of dormancy to the breaking time of internal dormancy. The results showed that the initial point of dormancy in selected cultivars could occur at the end of September. The breaking time of internal dormancy could occur from the end of January to the early of February. The accumulated hours under 7.2°C for breaking of internal dormancy were 1,600-2,000 hours, while those of 0.0-7.2°C were 1,300-1,800 hours. In comparing the different apple cultivars, the chilling requirement of the early flowering cultivars seemed lower than that of the late-flowering cultivars. Based on these results, if the air temperature of Gunwi region rises about 4.0°C higher than the current one, the breaking time of internal dormancy will be delayed by 2-4 weeks.