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Comparative Analysis between Healthy and Powdery Mildew-infected Plants of Strawberry Cultivar Seolhyang

딸기 설향품종의 흰가루병 건전 및 감염식물 비교 분석

  • Nam, Myeong-Hyeon (Nonsan Strawberry Experiment Station, Chungnam ARES) ;
  • Jeon, Yi-Nae (Department of Horticulture, Kongju National University) ;
  • Lee, Hee-Chul (Nonsan Strawberry Experiment Station, Chungnam ARES) ;
  • Lee, He-Duck (Nonsan Strawberry Experiment Station, Chungnam ARES) ;
  • Kang, Hee-Kyoung (Department of Horticulture, Kongju National University)
  • 남명현 (충남농업기술원 논산딸기시험장) ;
  • 전이내 (공주대학교 원예학과) ;
  • 이희철 (충남농업기술원 논산딸기시험장) ;
  • 이희덕 (충남농업기술원 논산딸기시험장) ;
  • 강희경 (공주대학교 원예학과)
  • Received : 2012.02.15
  • Accepted : 2012.05.31
  • Published : 2012.06.30

Abstract

We examined the incidence of powdery mildew in strawberry cv. Seolhyang plants, and performed a comparative analysis on the temperature, photosynthesis rate, and nutrient content of healthy and powdery mildew-infected plants. Powdery mildew first infected the fruit of the strawberries in mid-January, and the disease severity increased in both fruits and leaves during the late harvest season. The rate of photosynthesis and leaf temperatures of healthy plants were higher than those of powdery mildew-infected leaves and significantly decreased with an increase in the disease severity. The healthy and powdery mildew-infected plants in the soil analysis were not significantly different in chemical compositions. The leaves of the healthy plants contained lower potassium and higher manganese and chlorophyll concentrations than the powdery mildew-infected plants. In particular, manganese was significantly higher in healthy leaves than in infected leaves. Therefore, the concentrations of potassium, manganese and chlorophyll in strawberry leaves may be an important factor for disease suppression.

딸기 '설향' 품종을 대상으로 흰가루병 발생양상 및 건전식물체와 흰가루병 이병식물체 사이의 잎 온도, 광합성, 영양성분 등을 비교분석하였다. 흰가루병 발생은 1월 중순부터 과실에 발병이 시작되어 수확 후기에는 과실과 잎에도 발생되었다. 건전 식물체의 광합성 량과 잎 온도는 흰가루병 감염 식물체보다 높았으며 병 발생이 증가함에 따라 뚜렷하게 감소하였다. 건전 식물체와 이병식물체의 토양분석에서는 영양성분간 유의성이 없었다. 반면, 잎에서는 건전식물체가 이병식물체보다 칼륨 농도는 낮고 망간과 엽록소 함량은 높은 경향을 보였는데, 특히 망간농도가 건전식물체에서 현저하게 높음을 알 수 있었다. 따라서 딸기 잎의 칼륨, 망간, 엽록소 함량은 흰가루병 억제에 중요한 요인이 될 것이다.

Keywords

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