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      • 눈향나무와 시로미 잎의 엽록소형광 특성

        강연심,고정군,진국림,오순자,고석찬 제주대학교 생명과학연구소 1999 제주생명과학연구 Vol.2 No.-

        The characteristics of chlorophyll fluorescence were studied in the leaves of Sargent juniper (Juniperus chinensis var. sargentii) and crowberry (Empetrum nigrum var. japonicum) under natural field conditions. The photochemical efficiency of photosystemⅡ(PSⅡ), Fv/Fm, was slightly lower in the leaves of Sargent juniper than in those of crowberry, and the non-photochemical fluorescence quenching (NPQ) was higher in the leaves of Sargent juniper. In both species, the Fv/Fm values decreased temporarily at midday. This midday photoinhibition was more severe in Sargent juniper than in crowberry. Between Fv/Fm and environmental factors, there was no significant relationship with any factor in Sargent juniper leaves, while there were significant relationships with all factors in crowberry leaves. These results suggest that Sargent juniper has the mechanism for protecting or avoiding the photodamage although it is more sensitive to environmental changes than crowberry.

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