겨울철 자연환경에 노출된 문주란잎의 엽록소형광과 황산화효소 활성에 관한연구
Chlorophyll Fluorescence and Antioxidative Enzyme Activity of Crinum Leaves Exposed to Natural Envirionmental Stress in Winter
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Abstract
- Chlorophyll fluorescence and antioxidative enzyme activity were investi-gated from leaves of Crinum asiaticum var. japonicum under the natural condition inwinter, in order to monitor plant response and physiological states such as vitality,productivity and so on. In the O-J-I-P transients, the fluorescence intensity of J, I, P -step decreased remarkably depending on temperature drop in winter. The photochem-ical efficiencies of PSII, Fv/Fm, were significantly low in late winter with decrease ofFm. These results indicate that Crinum plants were affected by seasonal drop of tem-perature. The catalase activity significantly decreased depending on temperature dropin winter. However, the activity of superoxide dismutase ascorbate peroxidase andperoxidase slightly increased in winter while some isoenzymes appeared in winter.These results, with the remarkable decrease of Fv/Fm in winter, represent that Crinumplants were exposed to oxidative stress and subsequently damaged leading to celldeath.
참고문헌 (28)
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