Microbial diversity and abundance in the hot springs on the west coast of Saudi Arabia as a potential source of novel industrial products

AlSaade, Kholod; Ashy, Ruba; Al-Fassi, F. A.; Al-Judaibi, Awatif

doi:10.21608/mb.2022.134787.1055

Cited by 2 publications

(1 citation statement)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Many hot springs contain hot natural sulphur water that is spread in several areas serving as tourist destinations, health retreats, and wellness centres in the Kingdom. 10,11 Most studies have focused on hot springs in the southwestern regions of the Kingdom, such as the Gizan, Al-Lith, and Tabuk regions, [10][11][12][13][14] however, the northern regions of the Kingdom, especially the Al-Jouf region, remain relatively unexplored.…”

Section: Introductionmentioning

confidence: 99%

Characterization and Identification of Thermophilic Bacteria Isolated from Different Sites Located in Al-Jouf Region, Saudi Arabia

Saidan,

Jarboui,

Alsharari

et al. 2024

J. Pure Appl. Microbiol.

View full text Add to dashboard Cite

This study aims to investigate the morphological and biochemical characteristics of thermophilic bacteria isolated from thermophilic biotopes in the Al-Jouf region of Saudi Arabia for the first time. Additionally, the production of thermostable bacterial enzymes (proteases, amylases, cellulases, gelatinases, and lipases) was investigated. Six main bacterial species were identified via 16S rRNA sequencing and phylogenetic analysis. Twenty water and soil samples were collected from several thermophilic sites in the Dumat Al-Jandal and Al-Qurayyat cities. In total, 28 bacterial strains were isolated and biochemically characterized. Most isolated strains showed high protease and amylase production. 46 and 28% of isolated strains showed the production of cellulase and gelatinase, respectively. However, lipase production was not observed in any isolated bacteria. Four Bacillus licheniformis and two Bacillus subtilis strains exhibited high GC content (55%). Our findings suggest thermophilic bacteria as a source of thermostable enzymes for pharmaceutical and industrial applications.

show abstract

Section: Introductionmentioning

confidence: 99%

Characterization and Identification of Thermophilic Bacteria Isolated from Different Sites Located in Al-Jouf Region, Saudi Arabia

Saidan,

Jarboui,

Alsharari

et al. 2024

J. Pure Appl. Microbiol.

View full text Add to dashboard Cite

show abstract

Natural hydrogen potential and basaltic alteration in the Asal–Ghoubbet rift, Republic of Djibouti

Pasquet¹,

Idriss²,

Ronjon-Magand³

et al. 2023

BSGF - Earth Sci. Bull.

View full text Add to dashboard Cite

The Asal–Ghoubbet active rift in the Republic of Djibouti is a site of interest for geothermal energy and natural hydrogen, and previous studies have indicated that dihydrogen (H2) emanates from this rift. However, the well-known serpentinization reaction does not appear to be the main mechanism generating H2 at this site. Rather, the H2 is generated as follows: (1) by alteration of basaltic lava at depth via reaction with seawater flowing from Ghoubbet Bay towards Lake Asal; (2) by simple degassing of the volcanic chamber located a few kilometers below the Fiale Caldera in the rift axis; or (3) as a result of pyritization processes via the oxidation of H2S. Analysis of microorganisms did not indicate any production or consumption of H2, CO2, or CH4; therefore, it is unlikely that microorganisms affected H2 gas contents measured at the surface. However, air contamination at fumaroles is typically considerable and may limit interpretation of such processes. Drill cuttings from the Fiale 1 (F1) and Gale le Goma 1 (Glc1) wells (located on the inner and outer rift margins, respectively) were analyzed to determine where H2 is generated. Total rock analyses indicated distinct zones at depths of 464 m and 280 m for F1 and Glc1, respectively, representing the boundary between the Asal and Stratoïd Basalts. 57Fe Mössbauer analyses show a decrease in the percentage of Fe3+ at depth, indicating that Fe2+-rich material, particularly in the Stratoïd Basalts, may be a source of H2. Based on well data from the rift center and the outer rift margin, it is evident that H2 is present at the surface in the rift axis and that this area offers good remnant potential because of the presence of Fe-rich chlorite. Conversely, few H2 emissions were measured at the surface on the outer rift margins, although well data showed some H2 (~0.25%) at depth. The presence of a cap rock in the rift axis has not yet been proven; however, the high loss on ignition and the mineralogy in well Glc1 may indicate that the rocks are sufficiently altered to offer potential as a seal. If so, the rift margins would offer greater exploration potential than the rift center.

show abstract

Microbial diversity and abundance in the hot springs on the west coast of Saudi Arabia as a potential source of novel industrial products

Cited by 2 publications

References 38 publications

Characterization and Identification of Thermophilic Bacteria Isolated from Different Sites Located in Al-Jouf Region, Saudi Arabia

Characterization and Identification of Thermophilic Bacteria Isolated from Different Sites Located in Al-Jouf Region, Saudi Arabia

Natural hydrogen potential and basaltic alteration in the Asal–Ghoubbet rift, Republic of Djibouti

Contact Info

Product

Resources

About