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Çѱ¹»ý¹°È¯°æÁ¶ÀýÇÐȸ / v.10, no.3, 2001³â, pp.159-164
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( Influence of Chilling Stress on Photosynthetic and Physiological Reponses of Cucumber (Cucumis sativus L.) Seedlings )
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This study were conducted to investigate the influence of chilling on photosynthetic rate, root activity, contents of total sugars and fatty acids of cucumber seedlings grown in a greenhouse. Even though photosynthetic activity of seedlings exposed to $0^{circ}C$ for 5 hours was little or insignificantly influenced, it was reduced by 52.8% and 67.7% in seedlings exposed to the same temperature for an extended 10 and 24 hours, respectively. Photosynthetic rate decreased significantly when seedlings were illuminated, as compared to continuously held under darkness, during 15 hours of chilling treatment at 3$^{circ}C$. Recovery of photosynthetic ability was also retarded by illumination during a recovery period after chilling treatment. Root activity, as measured by the oxidation power of $alpha$-naphtylamine, was significantly reduced by chilling treatment at 0 to 6$^{circ}C$, but amount of bleeding xylem sap collected at 40 days after chilling treatment was not significantly different among treatments. Total sugar content increased by 12 and 23% as compared to the control in seedlings chilled for 24 hours, respectively, at 3$^{circ}C$. Contents of unsaturated linolenic and oleic acids increased, while content of saturated palmitic acid decreased with chilling treatment.
 
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»ý¹°È¯°æÁ¶ÀýÇÐȸÁö / v.10, no.3, 2001³â, pp.159-164
Çѱ¹»ý¹°È¯°æÁ¶ÀýÇÐȸ
ISSN : 1229-4675
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200111920845062)
¾ð¾î : Çѱ¹¾î
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