활성산소종이 무궁화 꽃의 노화에 미치는 영향

• Published in: Journal of plant biotechnology Vol. 36; no. 2; pp. 179 - 183
• Main Authors: 서상규(Sang Gyu Seo), 김선형(Sun Hyung Kim), 이긍표(Gung Pyo Lee), 강승원(Seung Won Kang)
• Format: Journal Article
• Language: Korean
• Published: Korean Society for Plant Biotechnology 30.06.2009; (사)한국식물생명공학회; 한국식물생명공학회
• Subjects: 농학
• ISSN: 1229-2818; 2384-1397

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.