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ORIGINAL RESEARCH article

Front. Plant Sci.
Sec. Plant Pathogen Interactions
Volume 15 - 2024 | doi: 10.3389/fpls.2024.1392138
This article is part of the Research Topic Infection and Colonization of Horticultural Crops by Microbial Pathogens View all 10 articles

Improved Resistance to Basal Rot Disease and Growth Promotion in Onion Plants by Silver Nanoparticles (AgNPs) Treatment

Provisionally accepted
Ahmed Fathy Yousef Ahmed Fathy Yousef 1M G. Hegazy M G. Hegazy 2Sobhi F. Lamlom Sobhi F. Lamlom 3Mahmoud Gad Mahmoud Gad 4Islam I. Teiba Islam I. Teiba 5Osama A. Al-Bedak Osama A. Al-Bedak 6Muhammad Moaaz Ali Muhammad Moaaz Ali 7*Piotr Stępień Piotr Stępień 8*Waleed M. Ali Waleed M. Ali 1*
  • 1 Department of Horticulture, College of Agriculture, University of Al-Azhar (branch Assiut), Assiut 71524, Egypt, Assiut city, Egypt
  • 2 Department of Agricultural Botany, Faculty of Agriculture, Al-Azhar University (Assiut Branch), Assiut 71524, Egypt
  • 3 Plant Production Department, Faculty of Agriculture Saba Basha, Alexandria University, lexandria 21531, Egypt
  • 4 Department of Botany and Microbiology, Faculty of Science, Al-Azhar University, Cairo, Egypt
  • 5 Department of Agricultural Plants, Faculty of Agriculture, Tanta University, Tanta, Egypt
  • 6 Assiut University Mycological Centre, Assiut, 71511, Egypt
  • 7 College of Horticulture, Fujian Agriculture and Forestry University, Fuzhou, Fujian Province, China
  • 8 Institute of Soil Science, Plant Nutrition and Environmental Protection, Wroclaw University of Environmental and Life Sciences, Wrocław, Poland

The final, formatted version of the article will be published soon.

    The effects of extracellular green-synthesized silver nanoparticles (AgNPs) produced by Aspergillus terreus AUMC 15760 both in vitro and under greenhouse conditions on basal rot disease caused by severe pathogenic Fusarium oxysporum AUMC 15798 were determined in this study. It was able to produce AgNPs with a range of 12.1 to 28.7 nm, which when combined with potato dextrose agar at 50, 100, 150, and 200 ppm, respectively, showed an antifungal impact of 24.88, 40.77, 54.44, and 693.3 % against F. oxysporum AUMC 15798. The disease severity was dramatically reduced to 20% following Dovex (50%) treatment, according to the greenhouse experiment results. After 50 ppm AgNPs (soil application and spray) treatment, the disease severity decreased to 57.77 and 35.55 %, respectively, and to 31.1 and 22.2 %, respectively, after 100 ppm AgNPs (soil application and spray) treatment. Spraying 100 ppm AgNPs had a favorable impact on plant fresh and dry weight, shoot and root length, and bulb length and diameter. Moreover, onion plants sprayed with 100 ppm AgNPs showed increased levels of carotenoid content, chlorophyll a, and chlorophyll b. The greatest reductions in phenolic content (0.31 and 0.34 mg g -1 ), anthocyanin content (0.46 and 0.48 mg g -1 ), peroxidase activity (0.49 and 0.44 µmole min -1 g -1 ), and catalase activity (0.22 and 0.19 µmoles min -1 g -1 ) were detected in plants treated with soil application of 50 ppm AgNPs and spray of 100 ppm AgNPs, respectively. These results demonstrate the potential of AgNPs as a useful tool for controlling the onion basal rot disease, enhancing plant development and photosynthetic efficiency while regulating antioxidant responses.

    Keywords: Antifungal activity, Antioxidant Defense, basal rot, Disease Management, Fusarium oxysporum, Nanoparticles

    Received: 27 Feb 2024; Accepted: 23 Aug 2024.

    Copyright: © 2024 Yousef, Hegazy, Lamlom, Gad, Teiba, Al-Bedak, Ali, Stępień and Ali. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

    * Correspondence:
    Muhammad Moaaz Ali, College of Horticulture, Fujian Agriculture and Forestry University, Fuzhou, Fujian Province, China
    Piotr Stępień, Institute of Soil Science, Plant Nutrition and Environmental Protection, Wroclaw University of Environmental and Life Sciences, Wrocław, Poland
    Waleed M. Ali, Department of Horticulture, College of Agriculture, University of Al-Azhar (branch Assiut), Assiut 71524, Egypt, Assiut city, Egypt

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