Terrestrial Bacteria from Agricultural Soils: Versatile Weapons against Aflatoxigenic Fungi

Shams-Ghahfarokhi, Masoomeh; Kalantari, S.; Razzaghi‐Abyaneh, Mehdi

doi:10.5772/45918

Cited by 14 publications

(14 citation statements)

References 37 publications

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“…In fact, gene expression reductions were the most drastic in the presence of the SN7 strain that reaches 85.6%, 89.8%, and 93.1% for acOTAhal , acOTAnrps , and acOTApks , respectively (see Figure 2 ). Therefore, soil-ubiquitous bacterial strains could be used as biological antagonists on several Aspergillus species and other mycotoxigenic genera [ 36 , 37 ]. These globally distributed bacteria mainly belong to Bacillus , Streptomyces , Pseudomonas , and Agrobacterium genera.…”

Section: Resultsmentioning

confidence: 99%

OTA Prevention and Detoxification by Actinobacterial Strains and Activated Carbon Fibers: Preliminary Results

Khoury

Choque

Khoury

et al. 2018

Toxins

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Ochratoxin A (OTA) is a mycotoxin produced by several species of Aspergillus and Penicillium that contaminate food and feed raw materials. To reduce OTA contamination, we first tested in vitro, actinobacterial strains as potential biocontrol agents and afterward, through a physical decontamination method using activated carbon fibers (ACFs). Actinobacterial strains were screened for their ability to reduce OTA in solid co-culture with A. carbonarius, which is the major OTA-producing species in European vineyards. Four strains showed a high affinity for removing OTA (67%–83%) with no significant effect on fungal growth (<20%). The mechanism of action was first studied by analyzing the expression of OTA cluster genes (acOTApks, acOTAnrps, acOTAhal) by RT-qPCR showing a drastic reduction in all genes (7–15 times). Second, the ability of these strains to degrade OTA was assessed in vitro on ISP2 solid medium supplemented with OTA (100 µg/L). Two strains reduced OTA to undetectable levels. As for the physical method, high adsorption rates were obtained for ACFs at 0.8 g/L with a 50% adsorption of OTA in red wine by AC15 and 52% in grape juice by AC20 within 24 h. These promising methods could be complementarily applied toward reducing OTA contamination in food chains, which promotes food safety and quality.

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Section: Resultsmentioning

confidence: 99%

OTA Prevention and Detoxification by Actinobacterial Strains and Activated Carbon Fibers: Preliminary Results

Khoury

Choque

Khoury

et al. 2018

Toxins

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“…In a global context, aflatoxin http://dx.doi.org/10.1016/j.chemosphere.2014.07.033 0045-6535/Ó 2014 Elsevier Ltd. All rights reserved. contamination is an everlasting concern among the developing countries between the 35°N and 35°S latitude where people often rely on susceptible crops for their daily nutrition and income (Shams-Ghahfarokhi et al, 2013). Dietary exposure to aflatoxin and human aflatoxicosis is now became a threat in developing countries that previously were not concerned about this issue (Williams et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

Transport via xylem and accumulation of aflatoxin in seeds of groundnut plant

2015

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“…Before biodegradation experiment, the compatibility of cultures was tested using tryptic soy agar (TSA) medium. [ 46,47 ] The fungal culture was spot inoculated in the center of TSA plate while bacterial culture was streaked on both sides of spot. The plates were incubated at 37 °C.…”

Section: Methodsmentioning

confidence: 99%

Biodegradation by Co‐inoculated Bacteria and Fungi Alleviates Adverse Effects of Red‐S3B on Growth and Nitrogen Uptake of Wheat

Shakeel

Imran

Ashraf

et al. 2020

CLEAN Soil Air Water

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Textile wastewater contains huge quantities of nitrogen (N)‐containing azo‐dyes. Irrigation of crops with such wastewater adds toxic dyes into our healthy soils. One of the ways to prevent their entry to soils could be these waters after the dyes' biodegradation. Therefore, the present study was conducted to evaluate the impact of textile dyes on wheat growth, dye degradation efficiency of bacteria‐fungi consortium, and alleviation of dye toxicity in wheat by treatment with microbial consortium. Among dyes, Red‐S3B (3.19% N) was found to be the most toxic to germination and growth of seven‐day‐old wheat seedlings. Shewanella sp. NIAB‐BM15 and Aspergillus terreus NIAB‐FM10 were found to be efficient degraders of Red‐S3B. Their consortium completely decolorized 500 mg L−1 Red‐S3B within 4 h. Irrigation with Red‐S3B‐contaminated water after treatment with developed consortium increased root length, shoot length, root biomass, and shoot biomass of 30‐day‐old wheat seedlings by 47, 18, 6, and 25%, respectively, than untreated water. Moreover, irrigation after microbial treatment of dye‐contaminated water resulted in 20 and 51% increase in shoot N content and N uptake, respectively, than untreated water. Thus, co‐inoculation of bacteria and fungi could be a useful bioremediation strategy for the treatment of azo‐dye‐polluted water.

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Terrestrial Bacteria from Agricultural Soils: Versatile Weapons against Aflatoxigenic Fungi

Cited by 14 publications

References 37 publications

OTA Prevention and Detoxification by Actinobacterial Strains and Activated Carbon Fibers: Preliminary Results

OTA Prevention and Detoxification by Actinobacterial Strains and Activated Carbon Fibers: Preliminary Results

Transport via xylem and accumulation of aflatoxin in seeds of groundnut plant

Biodegradation by Co‐inoculated Bacteria and Fungi Alleviates Adverse Effects of Red‐S3B on Growth and Nitrogen Uptake of Wheat

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