Bud Necrosis Characteristics of 'Hongisul' Grape

'홍이슬' 포도의 눈괴사 특성

  • Kim, Eun-Joo (Department of Integrative Plant Science, Chung-Ang University) ;
  • Lee, Byul-Ha-Na (Department of Integrative Plant Science, Chung-Ang University) ;
  • Kwon, Yong-Hee (Department of Integrative Plant Science, Chung-Ang University) ;
  • Shin, Kyoung-Hee (Department of Integrative Plant Science, Chung-Ang University) ;
  • Chung, Kyu-Hwan (Department of Integrative Plant Science, Chung-Ang University) ;
  • Park, Seo-Jun (National Institute of Horticultural & Herbal Science) ;
  • Park, Hee-Seung (Department of Integrative Plant Science, Chung-Ang University)
  • 김은주 (중앙대학교 식물시스템과학과) ;
  • 이별하나 (중앙대학교 식물시스템과학과) ;
  • 권용희 (중앙대학교 식물시스템과학과) ;
  • 신경희 (중앙대학교 식물시스템과학과) ;
  • 정규환 (중앙대학교 식물시스템과학과) ;
  • 박서준 (농촌진흥청 국립원예특작과학원) ;
  • 박희승 (중앙대학교 식물시스템과학과)
  • Received : 2010.11.08
  • Accepted : 2011.05.11
  • Published : 2011.10.31

Abstract

The germination of the buds in 'Hongisul' grapes is poor and especially the high ratio of shoots where the flowers failed to emerge it was difficult to secure a sufficient amount of harvest. Thus, in this study, the necrosis and the periodical change in the buds were observed morphologically and also the cause of necrosis of the bud was investigated in order to understand what was causing the low germination and flowering. There was no change in the size of the bud after June and based upon external observation, there wasn't any retrogression or withering. However, based on a microscopic examination, the ratio of whole bud and main bud necrosis of the 'Hongisul' grapes continued to increase after August, and specially the ratio of the main bud necrosis continued to increase up to October. As for the size of the buds on the shoots, the buds located on the $1^{st}-3^{rd}$ nodes from the basal part were small whereas the buds located on the $4-10^{th}$ nodes were comparatively larger in its size. The ratio of necrosis of the bud was the highest at the $1^{st}$ and $2^{nd}$ bud, meaning that the buds located at the basal part of the shoot were defective compared to those located at the end of the shoot. It was also found that when the growth of the shoot is active and the shoot diameter is thick, it hindered the development of the buds. Therefore, it was judged that long pruning of 'Hongisul' grapes would help the emergence of the flowers as you could use the buds that have comparatively developed better.

'홍이슬' 포도는 눈의 발아가 불량하고 특히 꽃송이가 출현하지 않는 신초의 발생이 많아 충분한 양의 결실 확보가 어려운 문제점이 발생하고 있다. 따라서, 본 연구에서는 신초의 발아 및 개화가 불량한 원인을 파악하고자 눈의 시기적 변화와 눈의 괴사를 형태적으로 관찰하고 괴사원인을 조사하였다. 6월 이후에는 눈의 크기에 큰 변화가 없었으며 이후 외형적으로 관찰했을 때에는 퇴화나 고사가 나타나지 않았다. 반면에 현미경 검경 결과 '홍이슬' 포도의 눈 및 주아 괴사율은 8월 이후에 계속 증가하였으며, 특히 주아 괴사율은 10월까지 계속 증가하였다. 신초 내 눈의 크기는 기부로부터 1-3번째 마디의 눈의 크기가 작았으며 4-10번째 마디의 눈의 크기는 상대적으로 큰 것으로 조사되었다. 1번째 눈과 2번째 눈에서 눈 괴사율이 가장 높게 발생하여 기부의 눈이 가지의 끝에 있는 눈에 비해 불량하였다. 또한, 신초의 생육이 활발해 가지가 굵으면 눈의 발달이 저해되는 것으로 나타났다. 따라서 '홍이슬' 포도는 장초전정을 실시하는 것이 상대적으로 발달이 양호한 눈을 이용할 수 있어 꽃송이 출현에 유리할 것으로 생각되었다.

Keywords

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