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    Two new sponge species (Demospongiae: Chalinidae and Suberitidae) isolated from hyperarid mangroves of Qatar with notes on their potential antibacterial bioactivity.

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    Date
    2020-05-13
    Author
    Giraldes, Bruno Welter
    Goodwin, Claire
    Al-Fardi, Noora A A
    Engmann, Amanda
    Leitão, Alexandra
    Ahmed, Asma A
    Ahmed, Kamelia O
    Abdulkader, Hadil A
    Al-Korbi, Halah A
    Al Easa, Hala Sultan Saif
    Ahmed Eltai, Nahla O
    Hanifi-Moghaddam, Pejman
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    Abstract
    This study presents the taxonomic description of two new sponge species that are intimately associated with the hyperarid mangrove ecosystem of Qatar. The study includes a preliminary evaluation of the sponges' potential bioactivity against pathogens. Chalinula qatari sp. nov. is a fragile thinly encrusting sponge with a vivid maroon colour in life, often with oscular chimneys and commonly recorded on pneumatophores in the intertidal and shallow subtidal zone. Suberites luna sp. nov. is a massive globular-lobate sponge with a greenish-black colour externally and a yellowish orange colour internally, recorded on pneumatophores in the shallow subtidal zone, with large specimens near the seagrass ecosystem that surrounds the mangrove. For both species, a drug extraction protocol and an antibacterial experiment was performed. The extract of Suberites luna sp. nov. was found to be bioactive against recognized pathogens such as Staphylococcus epidermidis, Staphylococcus aureus and Enterococcus faecalis, but no bioactive activity was recorded for Chalinula qatari sp. nov. This study highlights the importance of increasing bioprospecting effort in hyperarid conditions and the importance of combining bioprospecting with taxonomic studies for the identification of novel marine drugs.
    DOI/handle
    http://dx.doi.org/10.1371/journal.pone.0232205
    http://hdl.handle.net/10576/14987
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