New herbicide-degrading microorganisms for the biogenic synthesis of silver nanoparticles

IF 3.4 3区生物学 Q3 MICROBIOLOGY

Archives of Microbiology Pub Date : 2026-09-21 DOI:10.1007/s00203-026-05199-5

Juraeva Rokhila Nazarovna, Ergashev Rustam Baxtiyor ugli, Baymurzaev Erkin Nukusbay uli, Jalilov Javlon Zafar ugli, Turakulov Fozil Mamarayim ugli, Garafutdinov Ravil Rinatovich

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Abstract

Herbicide-resistant microorganisms were investigated for their potential in pendimethalin biodegradation and the biogenic synthesis of silver nanoparticles (AgNPs). Among the selected strains, Acinetobacter radioresistens R27, Bacillus pumilus R25, and Streptomyces variabilis R35 demonstrated pronounced pendimethalin-degrading activity. At a herbicide concentration of 125 mg/L, biomass increases after 7 days reached 87.5%, 92.0%, and 58.5%, while pendimethalin degradation efficiencies were 92.5%, 86.0%, and 62.0%, respectively. A. radioresistens R27 exhibited the highest degradation efficiency. Biogenic AgNP synthesis was confirmed by UV–Vis spectroscopy and X-ray diffraction, which demonstrated a face-centred cubic crystalline structure. The synthesized AgNPs showed predominantly spherical morphology, with particle sizes varying depending on the biosynthesis conditions. AgNPs synthesized using A. radioresistens R27 at 75 mg/L exhibited a zeta potential of − 20.5 mV. The synthesized AgNPs demonstrated pronounced concentration-dependent antifungal activity against Aspergillus flavus, Alternaria alternata, and Fusarium oxysporum. Thus, the investigated microorganisms, particularly A. radioresistens R27, demonstrated a combination of high pendimethalin-degrading capacity and biogenic AgNP synthesis associated with pronounced antifungal activity.

Graphical abstract

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生物合成纳米银的新型除草剂降解微生物。

研究了抗除草剂微生物在二甲甲烷生物降解和银纳米颗粒（AgNPs）生物合成中的潜力。在所选菌株中，放射耐药不动杆菌R27、杆状芽孢杆菌R25和变异性链霉菌R35表现出明显的苯二甲基甲烷降解活性。当除草剂浓度为125 mg/L时，7 d后生物量增加87.5%、92.0%和58.5%，对二甲甲烷的降解效率分别为92.5%、86.0%和62.0%。耐辐射菌R27的降解效率最高。通过紫外-可见光谱和x -射线衍射证实了AgNP的生物源性合成，并证实其为面心立方晶体结构。合成的AgNPs主要呈球形，粒径随生物合成条件的不同而变化。在75 mg/L浓度下，用a . radioresistens R27合成AgNPs的zeta电位为- 20.5 mV。合成的AgNPs对黄曲霉、互交霉和尖孢镰刀菌具有明显的浓度依赖性抗真菌活性。因此，所研究的微生物，特别是a . radioresistens R27，表现出高对二甲甲烷降解能力和生物源AgNP合成的结合，并具有明显的抗真菌活性。

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来源期刊

Archives of Microbiology 生物-微生物学

CiteScore

4.90

自引率

3.60%

发文量

601

审稿时长

3 months

期刊介绍： Research papers must make a significant and original contribution to microbiology and be of interest to a broad readership. The results of any experimental approach that meets these objectives are welcome, particularly biochemical, molecular genetic, physiological, and/or physical investigations into microbial cells and their interactions with their environments, including their eukaryotic hosts. Mini-reviews in areas of special topical interest and papers on medical microbiology, ecology and systematics, including description of novel taxa, are also published. Theoretical papers and those that report on the analysis or ''mining'' of data are acceptable in principle if new information, interpretations, or hypotheses emerge.