Induction of defense responses against Alternaria rot by different elicitors in harvested pear fruit

  • Shiping TianEmail author
  • Yakun Wan
  • Guozheng Qin
  • Yong Xu
Applied Microbial and Cell Physiology


Pear fruit (Pyrus pyrifolia L. cv. Yali) treated by different elicitors, such as salicylic acid (SA), oxalic acid, calcium chloride, and antagonistic yeast Cryptococcus laurentii, were investigated to determine the induction of defense responses. The possible mechanism by which elicitors induced the resistance of pear fruit against postharvest disease was also evaluated. The results indicated that all the elicitors could significantly enhance defense-related enzyme activities, such as β-1,3-glucanase, phenylalanine ammonia lyase, peroxidase, and polyphenol oxidase activity, and reduce the disease incidence caused by Alternaria alternata in pear fruit (P=0.05). Among these different elicitors, SA treatment showed the best result in inducing the defense responses and reducing the decay in pear fruit.


Salicylic Acid Oxalic Acid Phenylalanine Ammonia Lyase Salicylic Acid Treatment Alternaria Alternata 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



This work was supported by grants from the National Science Fund for Distinguished Young Scholars of China (30225030) and the National Natural Science Foundation of China (30430480).


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Copyright information

© Springer-Verlag 2005

Authors and Affiliations

  • Shiping Tian
    • 1
    Email author
  • Yakun Wan
    • 1
  • Guozheng Qin
    • 1
  • Yong Xu
    • 1
  1. 1.Key Laboratory of Photosynthesis and Environmental Molecular Physiology, Institute of BotanyThe Chinese Academy of SciencesBeijingChina

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