Horticultural Science & Technology (원예과학기술지)

Korean Society of Horticultural Science (한국원예학회)
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Influence of Defoliation by Marssonina Blotch on Vegetative Growth and Fruit Quality in 'Fuji'/M.9 Apple Tree

갈색무늬병에 의한 낙엽이 '후지'/M.9 사과나무의 수체생장 및 과실품질에 미치는 영향

  • SaGong, Dong-Hoon (Apple Research Station, National Institute of Horticulture & Herbal Science, Rural Development Administration) ;
  • Kweon, Hun-Joong (Apple Research Station, National Institute of Horticulture & Herbal Science, Rural Development Administration) ;
  • Song, Yang-Yik (Apple Research Station, National Institute of Horticulture & Herbal Science, Rural Development Administration) ;
  • Park, Moo-Yong (Apple Research Station, National Institute of Horticulture & Herbal Science, Rural Development Administration) ;
  • Nam, Jong-Chul (Apple Research Station, National Institute of Horticulture & Herbal Science, Rural Development Administration) ;
  • Kang, Seok-Beom (Apple Research Station, National Institute of Horticulture & Herbal Science, Rural Development Administration) ;
  • Lee, Sang-Gyu (Research and Development Evaluation Division, Research Policy Bureau, Rural Development Administration)
  • 사공동훈 (농촌진흥청 국립원예특작과학원 사과시험장) ;
  • 권헌중 (농촌진흥청 국립원예특작과학원 사과시험장) ;
  • 송양익 (농촌진흥청 국립원예특작과학원 사과시험장) ;
  • 박무용 (농촌진흥청 국립원예특작과학원 사과시험장) ;
  • 남종철 (농촌진흥청 국립원예특작과학원 사과시험장) ;
  • 강석범 (농촌진흥청 국립원예특작과학원 사과시험장) ;
  • 이상규 (농촌진흥청 연구정책국 평가관리과)
  • Received : 2011.02.01
  • Accepted : 2011.09.21
  • Published : 2011.12.31
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Abstract

This study was carried out to investigate the influence of defoliation by Marssonina blotch (Diplocarpon mali Harada et Sawamura) on vegetative growth and fruit quality in 'Fuji'/M.9 apple tree. Soluble solid contents decreased when the defoliation percentage by Marssonina blotch was over 10% before the end of September, and fruit weight decreased when percentage of defoliation was over 30%. Fruit red color and starch contents tend to decrease as percentage of defoliation near the fruit increased. Return bloom, fruit weight, and shoot growth the following year tend to decrease as percentage of defoliation increased. Photosynthetic rate of healthy leaves in bourse shoot during the end of September was maintained about $10{\mu}mol{\cdot}m^{-2}{\cdot}s^{-1}$, effects in increasing fruit growth and soluble solid contents after the end of September. Photosynthetic rates for the damaged leaf, damaged area was over 50% on the leaf surface, while 30% of the photosynthetic rates of healthy leaf are without damage applied with Marssonina blotch at the end of September. The results show that the decrease of fruit quality in defoliation treatments may be caused by the decrease of starch contents in fruit, and that was caused by the photosynthetic rates of leaves near fruit was decreased by Marssonina blotch in the wake of August.

본 실험은 '후지'/M.9 사과나무의 갈색무늬병에 의한 낙엽 정도가 수체생장과 과실품질에 미치는 영향을 조사하고자 실시하였다. 갈색무늬병에 의해 9월말 수관 전체 낙엽율이 10% 이상 되면 가용성고형물 함량이 감소되었고, 30% 이상이면 평균과중이 감소되었다. 과실의 착색과 전분 함량은 과실 주변 잎들의 낙엽 정도가 심해질수록 감소되는 경향을 나타내었다. 이듬해 개화율 및 과중, 총신초장은 전년도 낙엽율이 높을수록 감소되는 경향이 있었다. '후지'/M.9 사과나무의 과대지에서 갈색무늬병의 발생이 없는 잎은 9월 말에도 광합성속도를 약 $10{\mu}mol{\cdot}m^{-2}{\cdot}s^{-1}$ 이상 유지하여 9월 말 이후의 과실비대 및 가용성고형물 함량 증가에 영향을 미쳤다. 9월말 갈색무늬병반이 전체 잎면적의 50% 이상을 차지한 잎의 광합성속도는 건전한 잎의 30% 수준이었다. 결론적으로 낙엽구들의 과실품질 감소는 과실 내 전분 감소에 의해서 이며, 과실 내 전분 감소는 갈색무늬병에 의해 과실주변 잎들의 광합성속도가 8월 이후부터 감소되었기 때문이었다.

Keywords

References

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