Horticultural Science & Technology (원예과학기술지)

Korean Society of Horticultural Science (한국원예학회)
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Fruit Color Improvement by ABA Treatment and Determination of Harvesting Time in 'Hongisul' Grapes

ABA 처리를 통한 '홍이슬' 포도의 착색향상 및 적정 수확기 설정

  • Shin, Kyoung-Hee (Department of Integrative Plant Science, School of Bioresource and Bioscience, Chung-Ang University) ;
  • Park, Hee-Seung (Department of Integrative Plant Science, School of Bioresource and Bioscience, Chung-Ang University)
  • 신경희 (중앙대학교 생명자원공학부 식물시스템과학전공) ;
  • 박희승 (중앙대학교 생명자원공학부 식물시스템과학전공)
  • Received : 2012.03.22
  • Accepted : 2012.04.06
  • Published : 2012.06.30
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Abstract

This study was carried out to improve the fruit color through ABA treatment and to determine the optimum harvest time for producing high quality fruits in 'Hongisul' grapes. Spraying of $1000 mg{\cdot}L^{-1}$ exogenous ABA at early verasion (70 days after full bloom, DAFB) brought increase of endogenous ABA and soluble solid contents and enhanced fruit coloration. So, it was possible to harvest ABA treated fruits from 85 days after full bloom (15 days after treatment) by accelerated anthocyanin content which increased continuously until 110 DAFB. An increase of soluble solid and decrease of total acidity appeared steadily with the onset of berry ripening. After 100 DAFB, soluble solid content and total acidity did not change significantly, but the berry firmness was suddenly decreased. Consequently, it was suggested that ABA treated fruits need to be harvested at about 100 DAFB because of their short period of marketing by over ripening. On the contrary, harvesting of untreated fruit was totally impossible at 85 DAFB because of their poor berry coloration. But it was possible to harvest them at 100 DAFB based on the soluble solid/acidity ratio, whereas the berry coloration was progressed poorly. On the other hand, the fruits harvested at 110 DAFB showed acceptable berry coloration but their berry firmness was dropped significantly coincide with overripening. Therefore, it was needed to develop an altered production system for improving coloration at around 100 DAFB in 'Hongisul' grapes.

본 연구는 ABA 처리를 통해 '홍이슬' 포도의 착색을 증진시키고자 하였으며 고품질 과실을 생산할 수 있는 적정 수확시기를 밝히고자 하였다. 변색 초기에 $1000mg{\cdot}L^{-1}$ 의 외생ABA 처리는 내생 ABA와 당함량 증가를 가져왔으며 착색증진에 효과가 있는 것으로 조사되었다. ABA 처리 시 착색이 촉진되어 처리 후 15일인 만개 후 85일부터는 수확이 가능한 정도까지 착색되었으며 이후에도 계속적으로 안토시아닌 함량이 증가하였다. 과립성숙에 따른 가용성고형물의 증가와 산의 감소도 꾸준히 진행되었다. 만개 후 100일 이후에는 당도가 높고 산도는 낮은 수준으로 변화가 없으나 경도가 급격히 감소하였다. 따라서 지연 수확 시 과숙의 위험이 있어 과실의 상품성을 높이기 위해서는 만개 후 100일을 전후하여 수확하는 것이 바람직할 것으로 생각된다. 반면 무처리구의 경우에는 착색이 불량하여 만개 후 85일에는 수확이 불가능하였다. 만개 후 100일에도 당산비를 기준으로 한 수확은 가능하였으나 여전히 착색이 불량하였다. 착색을 기준으로는 만개 후 110일에서야 수확이 가능하였으나 과숙과 동시에 경도가 현저하게 낮았다. 따라서 무처리구의 경우 만개 후 100일을 기준으로 착색을 증진시키는 방법이 요구되었다.

Keywords

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