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The Effect of Cucumber(Cucumis sativus L.)Seed Soaked with Chlorocholine Chloride under Different Day and Night Temperature |
GAO Xiao-xu,ZHANG Zhi-gang,DONG Chun-juan,SHANG Qing-mao* |
Key Laboratory of Horticultural Corps Genetic Improvement,Ministry of Agriculture,Institute of Vegetables and Flowers,Chinese Academy of Agricultural Sciences,Beijing 100081,China |
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Abstract Experiments were conducted to investigate the influence of temperature on the effect of chlorocholine chloride(CCC)controlling excessive growth of cucumber(Cucumis sativus L.)seedlings,by using 4 different day/night temperature conditions.The results showed that CCC treatments could not control the excessive growth of hypocotyls in environment condition of day/night temperature of 35 ℃/ 25 ℃.Under the day/night temperature of 28 ℃/18 ℃ or 25 ℃/15 ℃ environment,as the temperature decreased,the concentrations of CCC for seed soaking,which was needed for strong seedling cultivation,were reduced accordingly.The best controlling effect were gained by 2 000 mg?L-1 and 500 mg?L-1 CCC,respectively.When the day/night temperature was 20 ℃/10 ℃,the growth of seedlings were significantly inhibited by CCC treatments,and hypocotyls were shortened,while the control treatment was not spindling,thus soaking seed with CCC was unnecessary under this condition.
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Received: 23 March 2011
Published: 06 May 2011
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