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Selection of Suitable Plant Growth Regulators for Augmenting Resistance to Waterlogging Stress in Soybean Plants (Glycine max L.)

콩 침수 스트레스에 대한 식물생장조절물질 처리 효과

  • Seo, Chang-Woo (Division of Applied Biosciences, Kyungpook National University) ;
  • Lee, Seok-Min (Division of Applied Biosciences, Kyungpook National University) ;
  • Kang, Sang-Mo (Division of Applied Biosciences, Kyungpook National University) ;
  • Park, Yeon-Gyeong (Division of Applied Biosciences, Kyungpook National University) ;
  • Kim, Ah-Yeong (Division of Applied Biosciences, Kyungpook National University) ;
  • Park, Hyeon-Jin (Division of Legume and Oil Crop Research, Department of Functional Crop, NICS, RDA) ;
  • Kim, Yoonha (Division of Applied Biosciences, Kyungpook National University) ;
  • Lee, In-Jung (Division of Applied Biosciences, Kyungpook National University)
  • 서창우 (경북대학교 응용생명과학부) ;
  • 이석민 (경북대학교 응용생명과학부) ;
  • 강상모 (경북대학교 응용생명과학부) ;
  • 박연경 (경북대학교 응용생명과학부) ;
  • 김아영 (경북대학교 응용생명과학부) ;
  • 박현진 (농촌진흥청 국립식량과학원 기능성작물부) ;
  • 김윤하 (경북대학교 응용생명과학부) ;
  • 이인중 (경북대학교 응용생명과학부)
  • Received : 2017.04.02
  • Accepted : 2017.08.26
  • Published : 2017.12.31

Abstract

This research was conducted to evaluate methods of enhancing the waterlogging resistance of soybean plant. Thus, we applied seven types of plant growth regulators (PGRs) to soybean plants and exposed them to waterlogged conditions for a total of 14 days. To evaluate stress resistance, we monitored plant growth characteristics data such as height, chlorophyll content, and chlorophyll fluorescence for 28 days after the initial waterlogging (14 days under waterlogging conditions and 14 days after waterlogging). According to the results, plant height was significantly increased by gibberellin A4 ($GA_4$) treatment compared to the control treatment and waterlogging-only treatment. However, we could not detect plant height owing to plant death when we applied abscisic acid (ABA). Except for $GA_4$ and ABA treatments, plant heights slightly decreased in all treatments compared to the waterlogging-only treatment. The chlorophyll content and chlorophyll fluorescence showed a similar tendency among PGR treatments. The chlorophyll content and chlorophyll fluorescence were significantly increased by ethephon and kinetin treatments 28 days after waterlogging compared to the waterlogging-only treatment. Consequently, kinetin and ethephon treatments induced more resistant phenotypes in soybean plants during or after exposure to waterlogging conditions.

국내에서 논에서 콩 재배시 토양특성과 기후적인 영향으로 인해 발생할 수 있는 침수스트레스를 경감할 수 있는 재배적 방법을 모색하기 위해 연구를 진행했다. 연구결과를 요약하면 아래와 같다. 1. 침수처리 후 경장은 $GA_4$처리에서 제일 컸으며 ABA처리에서는 콩 식물체가 죽는 것으로 조사됐다. 침수처리와 $GA_4$를 제외한 식물생장조절물질(IAA, KT, ETP, SA, MeJA) 처리 사이에는 큰 차이가 없는 것으로 조사됐다. 2. 침수처리 후 엽록소 함량과 Fv/Fm은 IAA, KT, ETP과 같이 식물의 조직과 기관의 발달에 관련된 식물생장조절물질 처리에서 침수처리보다 개선된 결과를 보였다. 이와는 반대로 식물의 스트레스 반응을 조절하는 것으로 알려진 식물생장조절물질 SA와 MeJA처리에서는 침수처리보다 엽록소 함량과 Fv/Fm값이 감소하였다. 3. 위 모든 결과를 종합해 볼 때 콩에서 침수스트레스 저항을 유도에는 식물생장조절물질 KT와 ETP 처리가 효과적이다.

Keywords

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