Journal of the Korean Society of International Agriculture (한국국제농업개발학회지)

The Korean Society of International Agriculture (한국국제농업개발학회)
권호 표지

Effect of Foliar Spray of Calcium Hydroxide on the Structural Characteristics of Pericarp and Berry Cracking in 'Kyoho' Grapes (Vitis. Sp.)

수산화칼슘의 엽면살포가 포도 '거봉' 과피의 구조적 특성과 열과에 미치는 영향

  • Son, In-Chang (Department of Horticultural Science, Chungbuk National University) ;
  • Shin, Hyun-Suk (Department of Horticultural Science, Chungbuk National University) ;
  • Oh, Sung-Il (Department of Horticultural Science, Chungbuk National University) ;
  • Park, Seo-Jun (Fruit Research Division, National Institute of Horticultural & Herbal Science) ;
  • Park, Kyo-Sun (Fruit Research Division, National Institute of Horticultural & Herbal Science) ;
  • Kim, Dae-Il (Department of Horticultural Science, Chungbuk National University)
  • Received : 2010.02.11
  • Accepted : 2010.03.15
  • Published : 2010.03.30
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Abstract

Berry cracking is one of the most serious problems in 'Kyoho' grape cultivation. To reduce the berry cracking, different concentrations (0, 15, 30, 45 $g{\cdot}L^{-1}$) of calcium hydroxide ($Ca(OH_2)$) were sprayed twice times at 4 and 8 weeks after full bloom day. Except the soluble solid content which increased in higher concentration of $Ca(OH_2)$ treatment, most characters of harvested grapes including cluster weight, berry weight, acidity, and anthocyanin content were not different significantly among treatments. Higher concentration of $Ca(OH_2)$ also showed increasing tendency of berry firmness in 'Kyoho' grape. Depending on different $Ca(OH_2)$ concentration of 15, 30 and 45 $g{\cdot}L^{-1}$, thickness of epidermal cell was increased to 3.42, 3.65 and 3.60 ${\mu}m$, and thickness of sub-epidermal cell was also remarkably increased to 4.69, 5.18 and 5.38 ${\mu}m$ respectively compared with controlled of 3.12 and 4.60 ${\mu}m$. Structural increase of epidermal and sub-epidermal cell wall thickness was effective for firmness of pericarp and berry cracking reduction in 'Kyoho' grape.

열과는 포도 '거봉'의 재배에 있어서 심각한 생리장해 중 하나이다. 이러한 열과를 경감시키기 위해 만개 후 4주와 8주에 각각 수산화칼슘 0, 15, 30, 45 $g{\cdot}L^{-1}$을 엽면 살포하였다. 각 처리구 간 과방중, 과립중, 산도, 안토시아닌 함량은 유의성이 인정되지 않았으나, 가용성 고형물은 높은 농도의 수산화칼슘 엽면살포구에서 증가하는 경향을 보였다. 15, 30, 45 $g{\cdot}L^{-1}$수산화칼슘 엽면살포구의 표피(3.42, 3.65, 3.6 ${\mu}m$)와 아표피층(4.69, 5.18, 5.38 ${\mu}m$)의 세포벽 두께는 무처리구의 표피와 아표피층의 세포벽 두께(3.12, 4.60 ${\mu}m$)에 비해 증가하였다. 표피와 아표피층 세포벽 두께의 구조적 증가는 포도 '거봉'의 과피 경도와 열과경감에 효과적이었다.

Keywords

Acknowledgement

Supported by : 농촌진흥청

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