Inhibitory Effects of Cu2O/SiO2 on the Growth of Microcystis aeruginosa and Its Mechanism

Fan, Gongduan; Bao, Minchen; Wang, Bo; Wu, Shimin; Lingxi, Luo; Li, Binhui; Lin, Jiuhong

doi:10.3390/nano9121669

Cited by 14 publications

(5 citation statements)

References 39 publications

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“…However, serving as light-harvesting pigments and an energy transfer medium in photosystems [44,49], the contents of chlorophyll-a and carotenoids in algal cells only decreased slightly by all the treatments (Figure 5). This agrees with previous studies indicating that chlorophyll-a and carotenoids were more resistant to UV radiation or oxidation, compared to protein [12,50]. This study also assessed the activities of two important intracellular antioxidant enzymes (SOD and CAT) in algal cells (Figure 6).…”

Section: The Inactivation Of H Akashiwo Cells By Uv/kmnosupporting

confidence: 89%

Efficient Inactivation and Removal of a Harmful Marine Algae—Heterosigma akashiwo—By UV-Assisted Permanganate Oxidation

Zeng,

Chen,

Jin

et al. 2023

Water

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Harmful algal blooms (HABs) caused by Heterosigma akashiwo are occurring in coastal waters frequently, posing a great risk to marine environments and subsequent treatment processes like desalination. UV-assisted permanganate oxidation (UV/KMnO4) is recognized as an innovative advanced oxidation process. This study investigated the inactivation and removal efficiencies of H. akashiwo cells by UV/KMnO4. Algal cells were effectively disintegrated into fragments by UV/KMnO4. Also, the degradation of photosynthetic pigments, membrane lipid peroxidation, and severe oxidative stress in algal cells was observed. The removal efficiency of algal cells reached 80.2% by 20 min of UV/KMnO4 oxidation, with a KMnO4 dosage of 5 mg L−1. In addition, the residual algal cells could be completely removed by a subsequent self-settling process, without an additional coagulation procedure. The fragmentation of algal cells caused by UV/KMnO4 may facilitate the formation of algal flocs, thereby improving the cell settleability. Furthermore, UV254 was significantly reduced by UV/KMnO4, which is expected to reduce the formation of disinfection byproducts and membrane fouling. This study elucidates that UV/KMnO4 can be a promising technique for the efficient treatment of harmful marine algae.

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Section: The Inactivation Of H Akashiwo Cells By Uv/kmnosupporting

confidence: 89%

Efficient Inactivation and Removal of a Harmful Marine Algae—Heterosigma akashiwo—By UV-Assisted Permanganate Oxidation

Zeng,

Chen,

Jin

et al. 2023

Water

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“…The activities of superoxide dismutase (SOD) and catalase (CAT) and the contents of glutathione (GSH) and malondialdehyde (MDA) were measured to estimate the effect of IV‐B20 on the antioxidant system of C. michiganensis subsp. michiganensis cells 39,40 . Compound IV‐B20 (100 μL) was added to 100 mL bacterial culture (OD 595 = 0.6) to the final concentrations of 4 μg/mL and 8 μg/mL.…”

Section: Methodsmentioning

confidence: 99%

“…michiganensis cells. 39,40 Compound IV-B20 (100 μL) was added to 100 mL bacterial culture (OD 595 = 0.6) to the final concentrations of 4 μg/mL and 8 μg/mL. The culture was incubated at 28 °C with shaking at 180 rpm for 0.5, 3, and 6 h. DMSO was used as a blank control.…”

Section: In Vitro Enzyme Inhibition Bioassaymentioning

confidence: 99%

Uracil hydrazones: design, synthesis, antimicrobial activities, and putative mode of action

Zhou,

Li,

Zeng

et al. 2023

Pest Management Science

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BACKGROUNDCrop diseases caused by plant pathogenic fungi and bacteria have led to substantial losses in global food production. Chemical pesticides have been widely employed as a primary means to mitigate these issues. Nevertheless, the persistent and excessive use of pesticides has resulted in the emergence of microbial resistance. Moreover, the improper application and excessive utilization of pesticides can contribute to environmental pollution and the persistence of pesticide residues. Consequently, the development of novel and highly effective bactericides and fungicides to combat plant pathogens holds immense practical importance.RESULTSA series of uracil hydrazones IV‐B was deliberately designed and evaluated for their antimicrobial efficacy. The results of bioassays indicated that most IV‐B exhibited > 80% inhibition against the fungal species Monilia fructigena and Sclerotium rolfsii, as well as the bacterial species Clavibacter michiganensis subsp. michiganensis, Xanthomonas oryzae pv. oryzae, and Ralstonia solanacearum, at 50 μg/mL in vitro. In vivo, IV‐B20 showed 89.9% of curative and 71.8% of protective activities against C. michiganensis subsp. michiganensis at 100 μg/mL superior to thiodiazole copper and copper hydroxide. IV‐B20 also showed excellent protective activity against M. fructigena (96.3% at 200 μg/mL) and S. rolfsii (80.4% at 1000 μg/mL), which were greater than chlorothalonil and equivalent to thifluzamide. Mechanistic studies revealed that IV‐B20 induced oxidative damage in pathogenic bacteria and promoted the leakage of cellular contents.CONCLUSIONThis study suggests that IV‐B20 with uracil hydrazone skeleton has great potential as an antimicrobial candidate. These lays a foundation for its practical application in agriculture.This article is protected by copyright. All rights reserved.

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“…Agricultural systems face severe challenges from stressors, including salt and drought, demanding creative strategies to increase stress tolerance. Furthermore, the necessity of strong defense mechanisms is highlighted by the sensitivity of plants and cyanobacteria to pathogenic agents [ 183 ].…”

Section: Stress Tolerance and Disease Resistancementioning

confidence: 99%

Exploring Sustainable Agriculture with Nitrogen-Fixing Cyanobacteria and Nanotechnology

Nawaz,

Gu,

Fahad

et al. 2024

Molecules

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The symbiotic relationship between nitrogen-fixing cyanobacteria and plants offers a promising avenue for sustainable agricultural practices and environmental remediation. This review paper explores the molecular interactions between nitrogen-fixing cyanobacteria and nanoparticles, shedding light on their potential synergies in agricultural nanotechnology. Delving into the evolutionary history and specialized adaptations of cyanobacteria, this paper highlights their pivotal role in fixing atmospheric nitrogen, which is crucial for ecosystem productivity. The review discusses the unique characteristics of metal nanoparticles and their emerging applications in agriculture, including improved nutrient delivery, stress tolerance, and disease resistance. It delves into the complex mechanisms of nanoparticle entry into plant cells, intracellular transport, and localization, uncovering the impact on root-shoot translocation and systemic distribution. Furthermore, the paper elucidates cellular responses to nanoparticle exposure, emphasizing oxidative stress, signaling pathways, and enhanced nutrient uptake. The potential of metal nanoparticles as carriers of essential nutrients and their implications for nutrient-use efficiency and crop yield are also explored. Insights into the modulation of plant stress responses, disease resistance, and phytoremediation strategies demonstrate the multifaceted benefits of nanoparticles in agriculture. Current trends, prospects, and challenges in agricultural nanotechnology are discussed, underscoring the need for responsible and safe nanoparticle utilization. By harnessing the power of nitrogen-fixing cyanobacteria and leveraging the unique attributes of nanoparticles, this review paves the way for innovative, sustainable, and efficient agricultural practices.

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Inhibitory Effects of Cu2O/SiO2 on the Growth of Microcystis aeruginosa and Its Mechanism

Cited by 14 publications

References 39 publications

Efficient Inactivation and Removal of a Harmful Marine Algae—Heterosigma akashiwo—By UV-Assisted Permanganate Oxidation

Efficient Inactivation and Removal of a Harmful Marine Algae—Heterosigma akashiwo—By UV-Assisted Permanganate Oxidation

Uracil hydrazones: design, synthesis, antimicrobial activities, and putative mode of action

Exploring Sustainable Agriculture with Nitrogen-Fixing Cyanobacteria and Nanotechnology

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