Rhizosphere microbiome metagenomics of gray mangroves (Avicennia marina) in the Red Sea

Hanin S. Alzubaidy, Magbubah Essack, Tareq Majed Yasin Malas, Ameerah Bokhari, Olaa Amin Motwalli, Frederick Kinyua Kamanu, Suhaiza Jamhor, Noor Azlin Mokhtar, Andre Antunes, Marta Simoes, Intikhab Alam, Salim Bougouffa, Feras Fawzi Lafi, Vladimir B. Bajic, John A.C. Archer

Research output: Contribution to journalArticlepeer-review

65 Scopus citations

Abstract

Mangroves are unique, and endangered, coastal ecosystems that play a vital role in the tropical and subtropical environments. A comprehensive description of the microbial communities in these ecosystems is currently lacking, and additional studies are required to have a complete understanding of the functioning and resilience of mangroves worldwide. In this work, we carried out a metagenomic study by comparing the microbial community of mangrove sediment with the rhizosphere microbiome of Avicennia marina, in northern Red Sea mangroves, along the coast of Saudi Arabia. Our results revealed that rhizosphere samples presented similar profiles at the taxonomic and functional levels and differentiated from the microbiome of bulk soil controls. Overall, samples showed predominance by Proteobacteria, Bacteroidetes and Firmicutes, with high abundance of sulfate reducers and methanogens, although specific groups were selectively enriched in the rhizosphere. Functional analysis showed significant enrichment in ‘metabolism of aromatic compounds’, ‘mobile genetic elements’, ‘potassium metabolism’ and ‘pathways that utilize osmolytes’ in the rhizosphere microbiomes. To our knowledge, this is the first metagenomic study on the microbiome of mangroves in the Red Sea, and the first application of unbiased 454-pyrosequencing to study the rhizosphere microbiome associated with A. marina. Our results provide the first insights into the range of functions and microbial diversity in the rhizosphere and soil sediments of gray mangrove (A. marina) in the Red Sea.
Original languageEnglish (US)
Pages (from-to)626-636
Number of pages11
JournalGene
Volume576
Issue number2
DOIs
StatePublished - Nov 10 2015

ASJC Scopus subject areas

  • Genetics

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