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      • 상치잎의 色素, 蛋白質含量 및 光系Ⅱ活性에 미치는 Sulfite와 산성 pH의 影響

        權炳奎,鄭華淑,柳岑台 慶北大學校 師範大學 1986 敎育硏究誌 Vol.28 No.-

        The present study was investigated to clarify the changes of pigments and soluable protein content, and PS Ⅱ activity of lettuce(Lactuca saliva L.) leaves induced by sulfite and acidic pH treatment. Lettuce leaves were treated with sodium sulfite at different concentrations, treatment time, and pH values. The leaf disks were illuminated at 20,000 lux and placed in darkness. Under the light condition pigments content, protein content and the rate of DCIP photoreduction were gradually reduced with the increase of sulfite concentration and treatment time below pH 5, but not in darkness. With treatment of 10mM sulfite for 3 hours at pH 7.0, pigments content were reduced by 21% in chlorophyll a, 17% in chlorophyll b, 14% in carotenoid, and protein content were also reduced by 47% in lettuce leaves. The rate of DCIP photoreduction were inhibited by 78% under the same conditions.

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