文献类型： 外文期刊

作者： Hegazy, Mohamed G. A. ¹ ; Gad, Mahmoud ² ; Lamlom, Sobhi F. ³ ; Teiba, Islam I. ⁴ ; Al-Bedak, Osama A. M. ⁵ ; Ali, Muhammad Moaaz ⁷ ; Alhomaidi, Eman ⁹ ; Al Tami, Mona Saleh ¹⁰ ; Yousef, Ahmed F. ¹¹ ; Ali, Waleed M. ¹¹ ;

作者机构： 1.Al Azhar Univ, Coll Agr, Dept Agr Bot Plant Pathol, Assiut, Egypt

2.Al Azhar Univ, Fac Sci, Dept Bot & Microbiol, Assiut, Egypt

3.Alexandria Univ, Coll Agr Saba Basha, Dept Plant Prod, Alexandria, Egypt

4.Tanta Univ, Fac Agr, Bot Dept, Microbiol, Tanta, Egypt

5.Assiut Univ, Mycol Ctr, Assiut, Egypt

6.Egyptian Russian Univ, ERU Sci & Innovat Ctr Excellence, Badr City, Egypt

7.Fujian Agr & Forestry Univ, Coll Hort, Fuzhou, Peoples R China

8.Fujian Agr & Forestry Univ, Coll Plant Protect, State Key Lab Ecol Pest Control Fujian & Taiwan C, Fuzhou, Peoples R China

9.Princess Nourah Bint Abdulrahman Univ, Coll Sci, Dept Biol, Riyadh, Saudi Arabia

10.Qassim Univ, Coll Sci, Dept Biol, Buraydah, Saudi Arabia

11.Univ Al Azhar, Coll Agr, Dept Hort, Assiut, Egypt

12.Chinese Acad Agr Sci, Zhengzhou Fruit Res Inst, Natl Key Lab Germplasm Innovat & Utilizat Hort, Zhengzhou, Henan, Peoples R China

关键词： Allium cepa; Antifungal activity; Antioxidant activity; Aspergillus terreus-mediated; Disease management; Ecofriendly fungicides; Greenhouse; Nanotechnology; Onion plant growth promotion; Rot disease resistance; Silver nanoparticles

期刊名称：ELECTRONIC JOURNAL OF BIOTECHNOLOGY （ 影响因子：2.5； 五年影响因子：2.7 ）

ISSN： 0717-3458

年卷期： 2025 年 77 卷

页码：

收录情况： SCI

摘要： Background: Onions, a vital agricultural crop rich in carbohydrates and essential minerals, face severe threats from Fusarium oxysporum, the causative agent of basal rot disease. This study assessed the effectiveness of extracellular, green-synthesized silver nanoparticles (AgNPs), produced by Aspergillus terreus AUMC 15760, in managing basal rot disease caused by F. oxysporum AUMC 15798. Results: AgNPs ranging from 12.1 to 28.7 nm were incorporated into PDA media at concentrations of 50, 100, 150, and 200 ppm, achieving fungal growth inhibition rates of 24.88%, 40.77%, 54.44%, and 69.33%, respectively. A greenhouse experiment was carried out using onion seedlings, with a randomized complete block design (RCBD) to compare eight different treatments: 100 ppm AgNPs (spray), 50 ppm AgNPs (spray), 100 ppm AgNPs (soil application), 50 ppm AgNPs (soil application), Dovex spray (50%), Dovex soil application (50%), a negative control, and a positive control. Greenhouse results showed a significant reduction in disease severity, with Dovex lowering it to 20%. AgNPs at 50 ppm reduced severity to 57.77% (soil) and 35.55% (spray), while 100 ppm further decreased it to 31.1% (soil) and 22.2% (spray). The application of 100 ppm AgNPs improved plant growth parameters. It also enhanced chlorophyll a, chlorophyll b, and carotenoid levels. The greatest reductions in phenolic (0.34 mg/g) and anthocyanin contents (0.48 mg/g), as well as peroxidase (0.44 lmol/min) and catalase activities (0.19 lmol/min), were recorded in plants treated with 100 ppm AgNPs (spray). Conclusions: AgNPs effectively control basal rot disease, boost plant growth, and regulate antioxidant activity. How to cite: Hegazy MG, Gad M, Lamlom SF, et al. Improved resistance to basal rot disease and promotion of onion plant growth by Aspergillus terreus-mediated silver nanoparticles. Electron J Biotechnol 2025;77. https://doi.org/10.1016/j.ejbt.2025.05.003. (c) 2025 The Author(s). Published by Elsevier Inc. on behalf of Pontificia Universidad Cat oe lica de Valpara & Uacute;so. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/ licenses/by-nc-nd/4.0/).