Zinc oxide nanostructures as a control strategy of bacterial speck of tomato caused by Pseudomonas syringae in Egypt

  • Mohsen Elsharkawy
  • Aly DerbalahEmail author
  • Amany Hamza
  • Abdelhamid El-Shaer
Nanotechnology, Nanopollution, Nanotoxicology and Nanomedicine (NNNN)


This study was conducted to evaluate the ability of zinc oxide nanoparticles (ZONPs) with unique properties to protect tomato against the bacterial speck pathogen, caused by Pseudomonas syringae pv. tomato DC3000 (Pst). Protection of tomato against bacterial speck using ZONPS was evaluated by its direct antibacterial activity and its ability for inducing resistance in tomato plants. The results revealed that ZONPs showed significant direct antibacterial activity against Pseudomonas syringae pv. tomato under laboratory conditions. Moreover, tomato plants treated with ZONPs showed a significant reduction in disease severity and bacterial proliferation relative to non-treated plants. Furthermore, tomato plants treated with ZONPs showed higher self-defense enzyme activity relative to untreated plants. The regulatory and defense genes, LePR-1a and Lipoxygenase (LOX), involved in the salicylic acid (SA) and (JA) signaling pathways, respectively, were highly expressed in tomato plants treated with ZONPs compared to untreated plants. Growth characters of tomato plants treated with ZONPs were significantly enhanced relative to untreated plants. The control of bacterial speck pathogen of tomato using ZONPs through its direct antibacterial and by developing of systemic resistance in treated tomatoes against the pathogen is considered the first report.


Tomato Bacterial speck Nanoparticles Systemic resistance induction Control 


Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.


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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Mohsen Elsharkawy
    • 1
  • Aly Derbalah
    • 2
    Email author
  • Amany Hamza
    • 2
  • Abdelhamid El-Shaer
    • 3
  1. 1.Agricultural Botany Department, Faculty of AgricultureKafrelsheikh UniversityKafrelsheikhEgypt
  2. 2.Pesticides Chemistry and Toxicology Department, Faculty of AgricultureKafrelsheikh UniversityKafresheikhEgypt
  3. 3.Physics Department, Faculty of ScienceKafreleheikh UniversityKafrelsheikhEgypt

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