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Acta Prataculturae Sinica ›› 2014, Vol. 23 ›› Issue (3): 182-190.DOI: 10.11686/cyxb20140321

• Orginal Article • Previous Articles     Next Articles

Allelopathic effects of Phragmites communis leaves on the growth and physiobiochemical characteristics of Solidago canadensis

LIU Cheng1,2,CHEN Xiao-de1,WU Ming2,HE Li1,YE Xiao-qi2,FAN Ting-xing1   

  1. 1.Key Laboratory of Eco-environments in Three Gorges Reservoir Region, Ministry of Education, Chongqing Key Laboratory of Plant Ecology and Resources Research in Three Gorges Reservoir Region, School of Life Sciences, Southwest University, Chongqing 400715, China;
    2.Research Institute of Subtropical Forestry, China Academy of Forestry, Wetland Ecosystem Research Station of Hangzhou Bay, State Forestry Administration, Fuyang 311400, China
  • Received:2013-08-27 Online:2014-06-20 Published:2014-06-20

Abstract: A sandy culture experiment was conducted to study the allelopathic effects of different concentrations (0, 0.025 g DW/mL, 0.05 g DW/mL and 0.1 g DW/mL) of aqueous extract from Phragmites communis leaves on the growth and physiobiochemical characteristics of the invasive plant species Solidago canadensis. During the test (0-45 d), cumulative growth of basal diameter and height of S. canadensis was significantly reduced with stronger extract concentrations while the mortality significantly increased. Chlorophyll content continued to decrease with time, and the higher the extract concentration the lower the chlorophyll content, while carotenoid content initially increased but then decreased. When treated at a low concentration (0.025 g DW/mL), the activities of peroxidase (POD) and superoxide dismutase (SOD) increased as processing time was prolonged, but when the concentration continued to rise, they both increased initially but then decreased. Catalase activity (CAT) and malondialdehyde (MDA) content increased when the concentration of extract increased, and both increased with processing time. Soluble protein content and root activity decreased at higher concentrations, and the trend was exacerbated with prolonged processing. The results indicate that allelopathic effects of P. communis on S. canadensis became stronger with increased concentration and processing time.

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