Investigation of antibacterial and anti-cancer activities of Streptomyces sp SRF1 culture filtrate

Sangdee, Kusavadee; Buranrat, Benjaporn; Seephonkai, Prapairat; Surapong, Nilawan; Sangdee, Aphidech

doi:10.4314/tjpr.v16i11.21

Cited by 4 publications

(2 citation statements)

References 22 publications

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“…The application of BC significantly increased the yield of soybean due to soil structure and improvement in moisture content as a result of changes in soil nitrifying bacteria. This can be attributed to the enhanced specific surface area and higher porosity as seen in the present study, which have been shown to enhance microbial activity and increase SOM (Chen et al, 2017;Ren et al, 2018;Sripreechasak et al, 2018;Sangdee et al, 2017). When BC is applied under the influence of tillage and cultivation operations, the distribution of soil compaction in the top layer of soil could be due to a dilution effect for the lighter fraction at the top layer (0-20 cm) (Soane, 1990).…”

Section: Discussionsupporting

confidence: 56%

Effect of Various Levels of Biochar Incorporation on Soybean Yields, Physical Quality and Nitrifying Bacteria of Black Soil in Northeast China

Jin¹

2019

Appl. Ecol. Env. Res.

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Maize-straw biochar (BC) was applied in a black soil area in Northeast China for investigating its effects on crop yield, soil physical properties and nitrifying bacteria. In this study, BC forms BC1, BC2 and BC3 were incorporated at levels of 15.75, 31.50 and 47.25 t ha -1 , respectively, from 2013 to 2014. The control soil was treated with chemical fertilizer (NPK). The results showed that yields of soybean were significantly improved overall due to BC applications, compared with the control. Meanwhile, average soil compaction values of 0 -20 cm deep soil were decreased from 17.9% to 47.4%. Biochar supplementation decreased the soil wilting coefficients, but increased saturated water content. The available soil water content increased from 0.211 to 0.329 cm 3 cm -3 (R 2 = 0.97), whereas the bulk density decreased from 1.42 to 1.40 g cm -3 (R 2 = 0.97) in response to BC supplementation. Unexpectedly, soybean yields began to decline at 31.50 and 47.25 t ha -1 of BC application. as well as soil aggregate stability, available water content, and capillary pores, mainly. Moreover, the BC supplementation significantly affected soil ammonia-oxidizing archaea (AOA) abundance. These results demonstrate that BC has positive potential for enhancing crop and soil properties performances in black soil at the level of 15.75 t ha -1 under continuous soybean system.

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Section: Discussionsupporting

confidence: 56%

Effect of Various Levels of Biochar Incorporation on Soybean Yields, Physical Quality and Nitrifying Bacteria of Black Soil in Northeast China

Jin¹

2019

Appl. Ecol. Env. Res.

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“…Another study found that Streptomyces spp. SRF1 culture filtrate extract had a minimum bactericidal concentration of (0.390 mg/ml) against MRSA [20].…”

Section: Discussionmentioning

confidence: 99%

The Antimicrobial Activity of Pechuel-Loeschea leubnitziae Leaf Extract and its Effect on The Expression Level of Methicillin Resistant Staphylococcus Aureus and Candida albicans Virulence-Associated Genes

Muhongo¹,

Kangogo

Bii

2022

Preprint

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The complete halt in the synthesis of new effective antimicrobial compounds is a global concern. Pathogenic microorganisms' virulence mechanisms seem to have a significant impact on their pathogenesis. The purpose of this study was to examine the antimicrobial activity of the ethanol and methanol fractions of Pechuel-Loeschea leubnitziae leaf extract, as well as its effect on the expression level of virulence-associated genes.The extract's fractions were evaluated for antimicrobial activity against Escherichia coli ATCC 25922, Pseudomonas aeruginosa ATCC 27853, Klebsiella pneumoniae (clinical), Methicillin-resistant Staphylococcus aureus, and Candida albicans ATCC 90029. The test organism's antibiogram pattern was determined. The extracts' attenuation effect on the target genes of the susceptible organisms was investigated employing relative quantification using RT-qPCR. The test organism's antibiogram pattern revealed that it was drug-resistant, intermediate, and sensitive. The extracts tested positive for antimicrobial activity against Methicillin-resistant Staphylococcus aureus and Candida albicans ATCC 90029, with zones of inhibition varying from 20.33 to 29 mm. The lowest recorded MIC value was 4.688 mg/ml, while the highest was 37.5 mg/ml. In contrast to the methanol extract, the ethanol extract had a cidal action at a lower dose. The ethanol extract's Sub-MIC (18.25 mg/ml) merely reduced the expression of the hly gene in MRSA. The MRSA virulence genes were not suppressed by the sub-MIC of methanol extract (18.25 mg/ml). Notably, the expression of als1, pbl1, and sap1 in Candida albicans ATCC 90029 was significantly attenuated when exposed to sub-MICs of ethanol extract (2,344 mg/ml) and methanol extract (9.375 mg/ml). Per the findings of this research, the leaves of P. leubnitziae could be a source of an effective antimicrobial agent in the therapy of MRSA/Candida-related disorders.

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Screening and characterization of antagonistic Streptomyces sp. JS20 from marine sediment in Vaan Island

Somasundaram,

Arulmani,

Ganesan

2024

The Microbe

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Investigation of antibacterial and anti-cancer activities of Streptomyces sp SRF1 culture filtrate

Cited by 4 publications

References 22 publications

Effect of Various Levels of Biochar Incorporation on Soybean Yields, Physical Quality and Nitrifying Bacteria of Black Soil in Northeast China

Effect of Various Levels of Biochar Incorporation on Soybean Yields, Physical Quality and Nitrifying Bacteria of Black Soil in Northeast China

The Antimicrobial Activity of Pechuel-Loeschea leubnitziae Leaf Extract and its Effect on The Expression Level of Methicillin Resistant Staphylococcus Aureus and Candida albicans Virulence-Associated Genes

Screening and characterization of antagonistic Streptomyces sp. JS20 from marine sediment in Vaan Island

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