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오존이 기린초와 비비추의 광합성, 항산화효소, 해부학적 구조에 미치는 영향
정효정(Hyo-Cheng Cheng),우수영(Su Young Woo),이성한(Seong Han Lee),백생글(Saeng Geul Baek) 한국원예학회 2010 원예과학기술지 Vol.28 No.3
The objective of this study was to identify the effects of ozone on the two species in controlled environment. Sedum kamtschaticum and Hosta longipes were exposed in both control and ozone chamber to investigate photosynthesis, antioxidant enzyme activity, visible damage, the number and the size of stomata and the plastogloubuli. Ozone was fumigated in the concentration of 200 ㎍ㆍ㎏?¹ for 8 hours in a day (from 08:00 AM to 04:00 PM). Firstly, net photosynthesis of two species was decreased after ozone fumigation. Secondly, glutathione reductase activities showed significant difference between control and ozone treatment. Thirdly, visible symptoms of leaves were expressed such as chlorosis, necrosis and decoloration. Also, the size of stoma was significantly decreased in ozone-exposed plants. Furthermore, the intercellular space of Hosta longipes showed increased phenomenon because the mesophyll was collapsed. The number and the size of the plastogloubuli were significantly larger in ozone stress.
정효정(Hyo Cheng Cheng),우수영(Su Young Woo),이성한(Seong Han Lee),곽명자(Myeong Ja Kwak),김경남(Kyeong Nam Kim) 한국원예학회 2013 원예과학기술지 Vol.31 No.1
In this study, the resistance to ozone and characteristics of ozone-induced damage were investigated on the perennial ground cover plant species. Sedum kamtschaticum and Hosta longipes were exposed to 200 μg?kg<SUP>-1</SUP> ozone for 8 hours per day (from 08:00 to 16:00) in the naturally irradiated phytotron. The extent of ozone-induced damage was measured through the analysis of physiological parameters, such as water use efficiency (WUE), chlorophyll content (Chl. a, Chl. b, Chl. a + b, and Chl. a/b ratio), carotenoid contents, and the induction of reactive oxygen species (ROS). Ozone exposure significantly reduced the daytime WUE in both species. The contents of chlorophyll and carotenoid were also decreased and ROS, such as hydrogen peroxide (H₂O₂) and superoxide radical (O₂<SUP>-</SUP>) were accumulated after ozone exposure. The above results of this study suggested that S. kamtschaticum is more resistant to atmospheric ozone than Hosta longipes. Considering its fast responses to ozone, it was also assumed that Hosta longipes can be used as an indicator plant of an increase in atmospheric ozone concentration.