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Chinese Agricultural Science Bulletin ›› 2013, Vol. 29 ›› Issue (7): 31-34.doi: 10.11924/j.issn.1000-6850.2012-4030

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Effect of Day-night Temperature Difference on Leaf Color of Ulmus pumila‘Zhonghua Jinye’

  

  • Received:2012-12-13 Revised:2013-01-16 Online:2013-03-05 Published:2013-03-05

Abstract: This study intended to measure the changes of the physiological parameters of Ulmus pumila‘Zhonghua Jinye’leaves under day-night temperature difference stress. The result showed that the content of chlorophyll and chlorophyll-a of leaves decreased firstly, and then increased with day-night temperature difference increase. Conversely, the content of chlorophyll-b and corticoid showed the opposite attribute and the content of soluble sugar increased all the time in this condition. By the effect of day-night temperature difference, chlorophyll/corticoid: 10℃<5℃<15℃<0℃<20℃, chlorophyll-a/chlorophyll-b: 10℃<5℃<0℃<15℃<20℃. These resultes indicated that T3 was positive to the accumulation of chlorophyll-b and corticoid, and had the minimum ratio of chlorophyll to corticoid and chlorophyll-a to chlorophyll-b; to view and admire Ulmus pumila‘Zhonghua Jinye’this time was recommended.