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Çѱ¹»ý¹°È¯°æÁ¶ÀýÇÐȸ / v.10, no.4, 2001³â, pp.244-250
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( Effect of Cold Acclimation and Deacclimation on the Freezing Tolerance, Total RNA, Soluble Protein and Soluble Sugar in Chinese Cabbage ) |
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| This study was conducted to determine the change in freezing tolerance of Chinese cabbage (Brassica campestris L. ssp. penkinensis). Four-week old seedlings grown in a greenhouse at $25^{circ}C$$pm$0.5 were transferred to 5, 10 or 15$^{circ}C$ condition for acclimation for one day, and then transferred to a lethal temperature of -3$^{circ}C$ condition. Optimal acclimation temperatures were 5$^{circ}C$ and 1$0^{circ}C$. Freezing tolerance of leaf tissues was investigated during a week-long cold stress. Development of freezing tolerance was shown by survival ratio, and amounts of total RNA, soluble protein and soluble sugar. LT$_{50}$ value increased from -3 to -4$^{circ}C$ after 5 days acclimation at 5 or 1$0^{circ}C$, and this was considered to be the first indication of enhanced freezing tolerance. Plants, cold acclimated for five days, reached to a survival ratio of 60%. This increase in freezing tolerance was found to be associated with the increased levels of total RNA, soluble sugar and soluble protein. These metabolic changes imply the association of adjustment of growth and cell metabolism with low temperatures at the beginning of cold acclimation in chinese cabbage.e. |
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| ¹èÃß;³»µ¿¼º;Àú¿Â¼øÈ;Å»¼øÈ;Chinese cabbage;freezing tolerance;cold acclimation;deacclimation; |
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»ý¹°È¯°æÁ¶ÀýÇÐȸÁö / v.10, no.4, 2001³â, pp.244-250
Çѱ¹»ý¹°È¯°æÁ¶ÀýÇÐȸ
ISSN : 1229-4675
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200111920844379)
¾ð¾î : ¿µ¾î |
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| ³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
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