| Biology and Soil |
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| Effects of Drought Stress and Rehydration on Chlorophyll Fluorescence Characteristics and Antioxidant Enzyme Activities in Leaves of Taxus cuspidata |
| LI Wei, ZHAO Yu-sen, ZHOU Zhi-qiang, SUN Guang-yu, LIU Tong |
| School of Forestry, Northeast Forest University, Harbin 150040, China |
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Abstract Three-year-old Taxus cuspidata seed seedling and cutting seedling were selected as the experimental material. The aims of this study were to explore the response and ecological adaptability of Taxus cuspidata seed seedling and cutting seedling to drought stress by investigating change of chlorophyll fluorescence characteristics and antioxidant enzyme activities. Result showed that minimum chlorophyll florescence(Fo) and non-photochemical quenching(NPQ) increased under the course of natural drought, Fo in cutting seedling increased faster than in seed seedling, and NPQ in seed seedling increased faster than in cutting seedling. After 15 days of drought stress, the cutting seedling showed significant decrease in maximum quantum efficiency of photosystemⅡphotochemistry (Fv/Fm), effective PSⅡquantum yield (ФPSⅡ) and apparent electron transport rate (ETR), compared with seed seedling. However, the alterations of seed seedling and cutting seedling could recover after rehydration. Under the drought stress, antioxidant enzyme activities of SOD, CAT and POD of seed seedling and cutting seedling increased. This indicated that the seed seedling had more drought adaptability than cutting seedling.
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Received: 12 May 2011
Published: 20 January 2012
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Cite this article:
LI Wei, ZHAO Yu-sen, ZHOU Zhi-qiang, SUN Guang-yu, LIU Tong. Effects of Drought Stress and Rehydration on Chlorophyll Fluorescence Characteristics and Antioxidant Enzyme Activities in Leaves of Taxus cuspidata. JOURNAL OF DESERT RESEARCH, 2012, 32(1): 112-116.
URL:
http://www.desert.ac.cn/EN/ OR http://www.desert.ac.cn/EN/Y2012/V32/I1/112
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2012, Vol. 32 
