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Acta Prataculturae Sinica ›› 2014, Vol. 23 ›› Issue (6): 253-258.DOI: 10.11686/cyxb20140630

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Effect of paclobutrazol on drought resistance of six turfgrass cultivars during the seedling stage

WANG Jing-hong,DUO Duo   

  1. College of Landscape Architecture, Northest Forestry University, Harbin 150040, China
  • Received:2014-04-22 Online:2014-12-20 Published:2014-12-20

Abstract: The wide use of turfgrass in urban landscaping has resulted in an increased water requirement for maintenance and management. A pot experiment was conducted to determine the physiological effects of different concentrations of paclobutrazol (PP333) on drought resistance of six turfgrass cultivars: two each of perennial ryegrass (Bomber and Esquire), red fescue (Beifang and Rubra) and kentucky bluegrass (Kentucky and Merit). Different concentrations of PP333 significantly increased the RWC, chlorophyll content and SOD activity, but decreased leaf relative electrical conductivity and proline content 30 d after drought stress, indicating that PP333 could effectively enhance the vitality and drought resistance of the six turfgrass cultivars. The optimal concentration of PP333 to increase the drought resistance was 100 mg/L for Esquire, Beifang and Rubra, 200 mg/L for Bomber and Kentucky, and 300 mg/L for Merit.

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