生物源银和铜纳米颗粒:水稻和小麦作物中潜在的抗真菌剂

Q3 Chemistry Chemistry Pub Date : 2023-10-06 DOI:10.3390/chemistry5040143
Paula Sanguiñedo, Ricardo Faccio, Eduardo Abreo, Silvana Alborés
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引用次数: 0

摘要

金属纳米颗粒由于其在控制植物病原体和促进植物生长等方面的潜在用途而受到广泛研究,对农业产生了重大影响。各种微生物代谢物被用来将金属和金属氧化物还原和稳定到纳米级。本文报道了利用哈兹木霉TA2生物合成氧化银和氧化铜纳米颗粒的方法。对纳米颗粒进行纯化,并用互补的方法进行表征,以获得纳米颗粒的大小、分布、形态、表面电荷和官能团的信息。研究了纳米颗粒对水稻和小麦病原菌的体外抑菌活性及其对种子萌发的影响。总的来说,纳米颗粒呈球形,平均尺寸为17-26 nm,多分散性较低。此外,在低浓度下,它们对稻瘟病菌核菌(0.140 ηM)、稻瘟病根丝核菌(0.140 ηM)、谷物镰刀菌(0.034 ηM)和稻瘟病菌(0.034 ηM)均有较强的抑菌活性。纳米粒子处理对种子的萌发没有负面影响。这是乌拉圭首次报道从一株哈兹芽孢杆菌中分离出的具有生物源性的银和氧化铜纳米颗粒,对四种感兴趣的植物病原体具有抗真菌活性。此外,生物纳米颗粒的合成比以前使用其他真菌的报道更快、更有效。综上所述,该研究表明,从哈氏霉TA2中提取的生物金属纳米颗粒可以作为控制重要作物病原菌的候选物质。
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Biogenic Silver and Copper Nanoparticles: Potential Antifungal Agents in Rice and Wheat Crops
Metal nanoparticles are widely studied due to their various applications, such as their potential use in the control of phytopathogens and the promotion of plant growth, with a significant impact on agriculture. Various microbial metabolites are used to reduce and stabilize metals and metal oxides to the nanoscale. In the present work, the biological synthesis of silver and copper oxide nanoparticles using Trichoderma harzianum TA2 is reported. The nanoparticles were purified and characterized with complementary methodologies to obtain information on the size, distribution, morphology, surface charge, and functional groups of the nanoparticles. The in vitro antifungal activity of the nanoparticles against pathogens of rice and wheat, as well as their effect on seed germination, were evaluated. In general, the nanoparticles showed a spherical shape, an average size of 17–26 nm, and low polydispersity. Furthermore, they showed antifungal activity at low concentrations against Sclerotium oryzae (0.140 ηM), Rhizoctonia oryzae-sativae (0.140 ηM), Fusarium graminearum (0.034 ηM), and Pyricularia oryzae (0.034 ηM). The germination of seeds treated with nanoparticles was not negatively affected. This is the first report of biogenic silver and copper oxide nanoparticles from a single strain of T.harzianum with antifungal activity against four phytopathogens of interest in Uruguay. Furthermore, the synthesis of the biogenic nanoparticles was faster and more efficient than previous reports using other fungi. In conclusion, this work reveals that biogenic metallic nanoparticles from T. harzianum TA2 can be considered as candidates for the control of phytopathogens affecting important crops.
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CiteScore
2.50
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0.00%
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审稿时长
11 weeks
期刊介绍: Chemistry—A European Journal is a truly international journal with top quality contributions (2017 ISI Impact Factor: 5.16). It publishes a wide range of outstanding Reviews, Minireviews, Concepts, Full Papers, and Communications from all areas of chemistry and related fields.
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