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| Effects of Different Prohexadion-calcium Concentration on Controlling Over Growth of Cucumber Seedlings |
| LI Rui ☆，JIANG Xin-mei ☆，LIU Han-bing，SHAO Qi-feng，WU Feng-zhi，YU Xi-hong* |
| Key Laboratory of Biology and Genetic Improvement of Horticultural Crops（Northeast Region），Ministry of Agriculture and Rural Affairs，School of Horticulture and Landscape，Northeast Agricultural University，Harbin 150030，Heilongjiang，China |
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Abstract Taking cucumber variety ‘Lyujian’as material，this paper studied the effects of Prohexadioncalcium（Pro-Ca）for controlling over growth of plug seedlings by applying different Pro-Ca concentration（100，150，200 mg · L-1）．The result showed that spraying Pro-Ca of certain concentration could effectively inhibit the hypocotyl length and plant height；improve G value，root-shoot ratio，strong seedling index，root system activity；and promote the photosynthesis，significantly increase chlorophyll content of leaves，net photosynthetic rate，transpiration rate and stomatal conductance，significantly decrease intercellular carbon dioxide concentration，decrease the level of IAA，GA3 and increase the level of ZR．Applying Pro-Ca of 150 mg · L-1 could have the best effects，effectively controlling the plant type of cucumber seedlings，improving seedling quality and being beneficial to cultivate strong seedlings．
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Received: 22 April 2019
Published: 23 June 2019
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