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Chinese Journal of Applied Ecology ›› 2005, Vol. 16 ›› Issue (1): 79-82.

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Dynamics of soil phenols in continuous cropping solar greenhouse and their effects on disease resistance-related enzyme activities in cucumber root

MA Yunhua, WEI Min, WANG Xiufeng   

  1. College of Horticulture, Shandong Agricultural University, Taian 271018, China
  • Received:2003-11-18 Revised:2004-03-26 Online:2005-01-15 Published:2005-01-15

Abstract: The study showed that under solar greenhouse condition,the contents of soil p-hydroxybenzoic acid,ferulic acid and benzoic acid and their total amounts increased with increasing continuous cropping years,and were obviously higher after continuously cropped for 5,7 and 9 years than for 1 and 3 years.Different concentration of soil phenols resulted in completely different effects on disease resistance-related enzyme activities in cucumber root,e.g.,under lower concentrations (40 and 80 μg·g-1),the activities of phenylalanine(PAL),ployphenol oxidase(PPO) and peroxidase(POD) were increased,while under higher levels (120 and 160 μg·g-1),they were restrained.Therefore,the changes of soil phenol contents in continuous cropping solar greenhouse could be one of the essential factors affecting the disease-resistance of cucumber.

Key words: Solar greenhouse, Continuous cropping, Phenols, Cucumber, Disease-related resistance

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