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Hyo Soon Kim(김효순),Jung Mi Park(박정미),Yoon Sik Park(박윤식),Sang Hee Lee(이상희),Dong Chan Won(원동찬),Byung Whan Lim(임병환),Nam Han Her(허남한),Jang Ha Lee(이장하),Seung Gyun Yang(양승균),Chee Hark Harn(한지학) 한국원예학회 2005 한국원예학회 학술발표요지 Vol.2005 No.5
Seven cultivars of tomato were exposed to 0.15μL/L ozone for 20 hours to determine differences in sensitivity. Based upon the degree of foliar injury, the highest degree of sensitive cultivars were 'Daehyongboksu' and 'Goangsu'. Four cultivars, 'Goangmyong', 'Pungyoung' and 'Pinkglory' including 'Pinkforcer' were separated into intermediate sensitive group. 'Neabyongjangsu' was the least sensitive of the 7 tomato cultivars tested. The degrees of ethylene production and epinasty of leaves were relatively consistent with the differences of sensitivity to ozone. However, stomatal and trichome density, transpiration rate, and activities of peroxidase and superoxide dismutase were not clearly related to the ozone sensitivity of cultivars.
Studies were conducted to examine the effects of single or combined treatment of uniconazole [(E)-1-(4-chlorophenyl)-4, 4-dimethyl 2(1, 2,-4-triazol-1-yl)-1-penten-3-ol)] and silver thiosulfate (STS) on reducing ozone injury to snap beans (Phaseolus vulgaris L. `Strike'). Two weeks after seeding, plants were given a soil drench of uniconazole(XE-1019) solution at concentrations of 0.001, 0.005 and 0.025 mg/pot. and then two days prior to ozone fumigation. 0.3 and 0.6 mM STS containing 0.01% Tween-20 were also sprayed. Uniconazole was effective in providing protection against ozone injury through increase activities of free radical scavengers such as superoxide dismutase (SOD) and peroxidase (POD) as well as the increase of chlorophyll content and stomatal resistance resulted from plant growth retardation. The phytoprotective effects of STS seemed to be related to its properly of blocking the ethylene action and increasing activities of SOD and POD. Even at low concentrations, a combined treatment with uniconazole drench, STS spray significantly reduced ozone injury compared to single application.