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

  • Applied Microbial and Cell Physiology
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Abstract

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.

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Acknowledgements

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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Authors and Affiliations

  1. Key Laboratory of Photosynthesis and Environmental Molecular Physiology, Institute of Botany, The Chinese Academy of Sciences, Beijing, 100093, China

    Shiping Tian, Yakun Wan, Guozheng Qin & Yong Xu

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  1. Shiping Tian
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  2. Yakun Wan
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  3. Guozheng Qin
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  4. Yong Xu
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Correspondence to Shiping Tian.

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Tian, S., Wan, Y., Qin, G. et al. Induction of defense responses against Alternaria rot by different elicitors in harvested pear fruit. Appl Microbiol Biotechnol 70, 729–734 (2006). https://doi.org/10.1007/s00253-005-0125-4

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