KOREAN JOURNAL OF CROP SCIENCE (한국작물학회지)

The Korean Society of Crop Science (한국작물학회)
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Comparisons in Anatomical Morphology Between Soybean Cultivars of Different Flooding Tolerance under Early Vegetative Flooding Conditions

영양생장기 습해 처리에 따른 콩 품종의 해부형태학적 특성 비교

  • Lee, Choong-Yeul (Plant Bioscience, College of Natural Resource & Life Science, Pusan National Univ.) ;
  • Cho, Jin-Woong (Div. of Plant Sci. & Resources, College of Agricultural & Life Science, Chungnam National Univ.)
  • 이충열 (부산대학교 생명자원과학대학) ;
  • 조진웅 (충남대학교 농업생명과학대학)
  • Published : 2007.09.30
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Abstract

To characterize flooding-affected anatomical morphology changes in soybean, flooding-tolerant cv Pung-sannamulkong (PSNK) and flooding-sensitive cv. Sobaek-namulkong (SBNK) at 5 trifoliate leaf stage were exposed to flooding by maintaining tap water 2 cm above soil surface for 9 days and resultant microscopic anatomical changes in leaf and hypocotyl cross-sections along with chlorophyll content and photosynthetic rate changes were compared. Flooding-sensitive SBNK exhibited more significant decrement in chlorophyll content, photosynthetic rate, number of palisade parenchyma, and leaf dry matter compared to cv. PSNK. Flooding decreased fineness of palisade parenchyma, while inducing wider xylem vessel, especially in PSNK. The aerenchyma formation in hypocotyls under flooding could be observed only in flooding-resistant PSNK. All these anatomical changes seems to be related with higher physiolocial activity and resultant resistance against flooding in PSNK compared to flood-sensitive PSNK.

본 실험은 내습성 품종과 감수성 품종을 5엽기에 9일간 침수 처리한 후 잎과 배축을 대상으로 횡단면을 해부학적 특성을 광학현미경으로 관찰하여 그 결과 다음과 같다. 1. 엽록소함량, 광합성, 책상조직 수, 엽두께 및 잎 건물중은 습해에 의해 급격히 감소되었으며 풍산나물콩보다 소백나물콩의 감소가 더 많았다. 2. 잎 조직의 책상조직의 치밀함은 습해에 의해 급격히 감소되었고 품종간 차이도 관찰되었으며, 풍산나물콩은 주맥의 통도조직 중 목부의 발달을 볼 수 있었다. 3. 배축의 통기조직 형성은 소백나물콩은 보이지 않았으나 풍산나물콩은 피층에 파생통기조직이 형성되는 것을 볼 수 있었다.

Keywords

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