Effects of GA3 and Streptomycin on Seedless Fruit Formation in Blackberry

HeaMin Jeong; Eun Ju Kim; Dong Geun Choi

doi:10.12972/kjhst.20180066

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2018 Vol.36, Issue 5 Preview Page Next Page

Research Article

Effects of GA₃ and Streptomycin on Seedless Fruit Formation in Blackberry GA₃와 Streptomycin 복합처리가 블랙베리 무핵화 유기에 미치는 영향

31 October 2018. pp. 658-665

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Abstract

This study was carried out to determine the effects of various application times and concentrations of GA₃ with streptomycin (SM) on fruiting, the rate of seedless drupelet formation, and fruit quality in ‘Super’ blackberry. Flower clusters were sprayed with GA₃ at 12.5, 25.0, 50.0, and 100 mg·L^-1 combined with 200 mg·L^-1 SM. Single treatments were conducted using a hand sprayer at 30% and 50% of full bloom (FB), and duplicate treatments were conducted by spraying twice at 30% and 50% FB, respectively. The application of GA₃+SM on flower clusters had no effect on fruit set, harvest time, or various fruit qualities (fruit firmness and SSC). The rate of seedless drupelet formation for control fruit was approximately 2.5%. Under single treatment, the rate of seedless drupelet formation was higher at a spray time of 50% FB compared with 30% FB treatment, and the rate was highest at a GA concentration of 25.0 mg·L^-1. The highest seedless drupelet rate was 56.7% for fruits sprayed twice at 30% and 50% FB with GA+SM. Single treatment at 30% FB with 100 mg·L^-1 GA₃+SM induced 22.2-35.2% seedless drupelet formation, whereas single treatment at 50% FB and duplicate treatments at 30 and 50% FB led to the formation of seedless drupelets at a rate of 31.6-42.2% and 22.6-56.7%, respectively. Among GA concentrations, 25.0 mg·L^-1 GA₃ treatment led to the highest rate of seedless drupelet formation (35.3-56.7%). The occurrence of malformed berries was higher in the GA+ SM treatment group than in the control, and the incidence increased with increasing GA concentration. GA₃+SM treatment slightly increased fruit length but had no effect on fruit diameter.

Keywords

fruit quality

fruit set

harvest time

malformed berries

seedless drupelets

본 연구는 GA₃와 Streptomycin(SM) 복합처리 시기와 농도가 블랙베리 ‘슈퍼’의 착과율, 무핵소과율 및 과실품질에 미치는 영향을 구명하고자 수행되었다. GA₃농도를 12.5, 25.0, 50.0, 100mg·L^-1로 하고 SM 200mg·L^-1을 각각 혼용하였고, 처리시기는 1회 처리는 30% 개화했을 때(30% FB)와 50% 개화했을 때(30% FB), 그리고 중복처리는 30%와 50% 개화했을 때 2회 처리(30+50% FB)하였다. GA₃+SM 복합처리가 착과율과 과실 품질(경도, 당도, 산도)에는 영향이 없었지만, 과중은 모든 GA₃+ SM 처리에서 낮아졌으며 특히 중복처리(30+50% FB)에서 더 낮아졌다. 그러나 무핵소과율은 GA₃처리농도가 증가할수록 높게 나타났는데, 이러한 효과는 30% FB 1회 처리보다 50% FB 1회 처리와 30%+50% FB 중복처리구에서 더 크게 나타났으며, 무처리구의 무핵소과율은 2.5%이었으나 30% FB 1회 처리구는 22.2-35.2%, 50% FB 1회 처리구는 31.6-42.2%, 30% FB+50% FB 중복처리구는 22.6-56.7%로 나타났다. GA 처리농도별로는 GA₃25mg·L^-1+ SM에서 35.3-56.7%로 높았다. 기형과율은 무처리에서는 2.9%이었으나 GA₃처리농도가 증가할수록 높게 나타나 13.4-35.3% 수준으로 나타났다. 과실의 종경은 GA₃농도가 증가할수록 약간 길어졌으나 횡경은 처리시기별 차이가 없었다.

키워드

과실 품질

기형과

무핵소과

수확기

착과

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Information

Publisher :KOREAN SOCIETY FOR HORTICULTURAL SCIENCE
Publisher(Ko) :한국원예학회
Journal Title :Horticultural Science and Technology
Journal Title(Ko) :원예과학기술지
Volume : 36
No :5
Pages :658-665
Received Date : 2017-09-22
Revised Date : 2018-04-02
Accepted Date : 2018-03-31
DOI :https://doi.org/10.12972/kjhst.20180066

Horticultural Science and Technology 원예과학기술지 ISSN:1226-8763(Print) 2465-8588(Online)

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