Journal of Plant Biotechnology

The Korean Society of Plant Biotechnology (한국식물생명공학회)
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Effect of reactive oxygen species on floral senescence in Hibiscus syriacus L.

활성산소종이 무궁화 꽃의 노화에 미치는 영향

  • Seo, Sang-Kyu (Department of Environmental Horticulture, The University of Seoul) ;
  • Kim, Sun-Hyung (Department of Environmental Horticulture, The University of Seoul) ;
  • Lee, Gung-Pyo (Department of Applied Plant Science, College of Industrial Science, Chung-Ang University) ;
  • Kang, Seung-Won (Gene Research Center, Graduate School of Life and Environmental Science, University of Tsukuba)
  • 서상규 (서울시립대학교 환경원예학과) ;
  • 김선형 (서울시립대학교 환경원예학과) ;
  • 이긍표 (중앙대학교 산업과학대학 식물응용과학과) ;
  • 강승원 (쓰쿠바대학 대학원 생명환경과학연구과 유전자실험센터)
  • Published : 2009.06.30
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Abstract

To understand the effect of reactive oxygen species (ROS) on floral senescence in Hibiscus syriacus L., we have investigated change in relative water potential, malondialdehyde (MDA) content, H_2O_2 content and the activity of antioxidative enzymes in the petals during flower opening and senescence. Hibiscus flowers were achieved full bloom at early morning and started to in-rolling and showed petal in-rolling over than 50% at 24 h and 36 h after full bloom, respectively. The flower was a decrease in fresh weight by 30% and showed water loss with floral senescence. MDA content and activity of antioxidative enzymes such as APX, GR and CAT were showed no significant change until 36 h after full bloom. In the flower 48 h after full bloom that showed complete petal in-rolling and wilting, however, activity of antioxidative enzymes and H_2O_2 content was greatly increased as compared with 0 h after full bloom. These results suggest that reactive oxygen species are related to accelerating the later senescence more than inducing the early senescence during Hibiscus flower senescence.

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References

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