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Effects of Waterlogging Stress on Physiological Response and Growth of Italian Ryegrass (Lolium multiflorum L.)

습해 스트레스가 이탈리안 라이그라스의 생리 반응과 성장에 미치는 영향

  • Min-Jun, Kim (Division of Applied Life Science (BK21), IALS, Gyeongsang National University) ;
  • Chang-Woo, Min (Division of Applied Life Science (BK21), IALS, Gyeongsang National University) ;
  • Il-Kyu, Yoon (Division of Applied Life Science (BK21), IALS, Gyeongsang National University) ;
  • Jeong Sung, Jung (Grassland and Forage Division, National Institute of Animal Science, RDA) ;
  • Byung-Hyun, Lee (Division of Applied Life Science (BK21), IALS, Gyeongsang National University)
  • 김민준 (경상대학교 응용생명과학부(BK21), 농업생명과학연구원) ;
  • 민창우 (경상대학교 응용생명과학부(BK21), 농업생명과학연구원) ;
  • 윤일규 (경상대학교 응용생명과학부(BK21), 농업생명과학연구원) ;
  • 정종성 (국립축산과학원 초지사료과) ;
  • 이병현 (경상대학교 응용생명과학부(BK21), 농업생명과학연구원)
  • Received : 2022.12.11
  • Accepted : 2022.12.26
  • Published : 2022.12.31

Abstract

This study was conducted to investigate the effect of waterlogging stress on the physiological response and growth characteristics of the five Italian ryegrass varieties. For all varieties, the germination rate of seed decreased by 10-15% as the waterlogging period increased, but the waterlogging stress treatment after the early seedling stage increased the growth of shoot and root length. Photosynthetic activity (Fv/Fm) according to waterlogging stress treatment decreased in all vareity, and Florida 80 showed the least decrease with 1.5%. Waterlogging stress treatment was found to reduce the accumulation of reactive oxygen species (malondialdehyde, MDA) and the activities of antioxidant enzymes. These results suggest that other mechanisms may be involved in the defense mechanism of Italian ryegrass against waterlogging stress, such as promoting root growth to escape from waterlogging stress, in addition to the antioxidant enzyme system.

Keywords

Acknowledgement

본 논문은 농촌진흥청 연구사업[기후변화에 따른 목초·사료작물의 생산성 실태조사 및 영향·취약성평가(1단계), PJ015079022022]의 지원에 의해 이루어진 것임.

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