Activity of the desert truffle Terfezia boudieri Chatin, against associated soil microflora

Dib-Bellahouel, Soulef; Fortas, Zohra

doi:10.5897/ajmr2014.6881

Cited by 4 publications

(1 citation statement)

References 56 publications

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“…This study showed obviously that TMM bacteria were about 10 2 CFU/g dry matter higher than fungi or both E. coli and P. aeruginosa. A similar study carried out by Dib-Bellahouel and Fortas (2014) [30] showed an estimated total count about 8.3 to 8.6 × 10 7 CFU/g of dry soil, while fungal genera present only 8.6 × 10 4 to 4.5 × 10 5 CFU/g. Thus, it is possible to suggest that the number of bacteria and fungi in adhered soil is balanced by the Truffle presence, this suggestion need to be more demonstrated in other studies.…”

Section: Microbial Presence In the Adhered Soil Of T Aestiviummentioning

confidence: 84%

Sanitizing Method Effects on Depending-Culture Microorganisms in <i>Tuber aestivium</i>

Romdhane¹,

Saidi²,

Deshaware³

et al. 2015

AiM

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Tuber aestivum/uncinatum has been widely used as food, food additives, and traditional medicine. Truffles are extremely perishable with a short postharvest life quality requiring a special handling for marketing in order to delay its deterioration. This study aimed to assess the effects of different sanitizing methods on superficial Tuber aestivium quality ascocarp. The results showed that the best treatment was obtained by immersing the Truffle ascocarps in boiling water for 1 or 2 min where counts of total mesophilic microoraganisms (TMM) were respectively 81 and 7 CFU per g of dry Truffle ascocarps biomass, respectively. However, the highest TMM was obtained after rinsing Truffle ascocarps in 2% NaOH where recovery was 10 8 CFU per g of dry Truffle ascocarps biomass. Treatments applied to disinfect Truffle ascocarps were classified by increasing degree of efficiency as follows to reduce the microbial load expressed in CFU/g: Dipping in boiling water (2 min) 7 ± 3.41; dipping in boiling water (1 min) 81 ± 25.8, rinsing with alcohol 2.10 2 ± 13; rinsing with tap water 6.10 3 ± 36; rinsing with H2O2 6.10 4 ± 2; brushing 2.10 5 ± 28 and rinsing with NaOH 10 8 ± 15.

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Section: Microbial Presence In the Adhered Soil Of T Aestiviummentioning

confidence: 84%

Sanitizing Method Effects on Depending-Culture Microorganisms in <i>Tuber aestivium</i>

Romdhane¹,

Saidi²,

Deshaware³

et al. 2015

AiM

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Beneficial native bacteria improve survival and mycorrhization of desert truffle mycorrhizal plants in nursery conditions

Navarro‐Ródenas¹,

Berná²,

Lozano-Carrillo

et al. 2016

Mycorrhiza

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Sixty-four native bacterial colonies were isolated from mycorrhizal roots of Helianthemum almeriense colonized by Terfezia claveryi, mycorrhizosphere soil, and peridium of T. claveryi to evaluate their effect on mycorrhizal plant production. Based on the phylogenetic analysis of the 16S rDNA partial sequence, 45 different strains from 17 genera were gathered. The largest genera were Pseudomonas (40.8 % of the isolated strains), Bacillus (12.2 % of isolated strains), and Varivorax (8.2 % of isolated strains). All the bacteria were characterized phenotypically and by their plant growth-promoting rhizobacteria (PGPR) traits (auxin and siderophore production, phosphate solubilization, and ACC deaminase activity). Only bacterial combinations with several PGPR traits or Pseudomonas sp. strain 5, which presents three different PGPR traits, had a positive effect on plant survival and growth. Particularly relevant were the bacterial treatments involving auxin release, which significantly increased the root-shoot ratio and mycorrhizal colonization. Moreover, Pseudomonas mandelii strain 29 was able to considerably increase mycorrhizal colonization but not plant growth, and could be considered as mycorrhiza-helper bacteria. Therefore, the mycorrhizal roots, mycorrhizosphere soil, and peridium of desert truffles are environments enriched in bacteria which may be used to increase the survival and mycorrhization in the desert truffle plant production system at a semi-industrial scale.

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Evaluation of antimicrobial activity of Terfezia arenaria extracts collected from Saharan desert against bacteria and filamentous fungi

et al. 2019

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Different desert truffles, collected from Algerian Saharan soils, were identified and their capacity to produce bioactive substances with antimicrobial activity was analyzed. Based on morphological characterization using Melzer's reagent staining, the collected strains were identified as Terfezia arenaria. The bioactive substances from T. arenaria were extracted using the following techniques: maceration with methanol and Soxhlet with dichloromethane. The former led to a yield much higher than that of the latter (i.e., 15% and 0.48%, respectively). Both extracts presented antifungal activities against all the tested strains (i.e., A. niger, Penicillium sp., and C. albicans). However, the dichloromethane extracts showed much higher antibacterial activities against all the tested bacteria (i.e., S. aureus, E. faecalis, E. coli, and P. aeruginosa) than the methanol extracts. The thin layer chromatography of both extracts confirmed the presence of polyphenols and flavonoids.

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Activity of the desert truffle Terfezia boudieri Chatin, against associated soil microflora

Cited by 4 publications

References 56 publications

Sanitizing Method Effects on Depending-Culture Microorganisms in <i>Tuber aestivium</i>

Sanitizing Method Effects on Depending-Culture Microorganisms in <i>Tuber aestivium</i>

Beneficial native bacteria improve survival and mycorrhization of desert truffle mycorrhizal plants in nursery conditions

Evaluation of antimicrobial activity of Terfezia arenaria extracts collected from Saharan desert against bacteria and filamentous fungi

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Activity of the desert truffle Terfezia boudieri Chatin, against associated soil microflora

Cited by 4 publications

References 56 publications

Sanitizing Method Effects on Depending-Culture Microorganisms in &lt;i&gt;Tuber aestivium&lt;/i&gt;

Sanitizing Method Effects on Depending-Culture Microorganisms in &lt;i&gt;Tuber aestivium&lt;/i&gt;

Beneficial native bacteria improve survival and mycorrhization of desert truffle mycorrhizal plants in nursery conditions

Evaluation of antimicrobial activity of Terfezia arenaria extracts collected from Saharan desert against bacteria and filamentous fungi

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Sanitizing Method Effects on Depending-Culture Microorganisms in <i>Tuber aestivium</i>

Sanitizing Method Effects on Depending-Culture Microorganisms in <i>Tuber aestivium</i>