Diversity of Endophytic and Rhizosphere Soil Fungi of Avicennia marina in Maravakadu Mangrove Forest

Selvakumar, Vijayalakshmi; Panneerselvam, A.; Vijayakumar, N.; Savery, M. A. J. R.; Thajuddin, Nooruddin

doi:10.9790/3008-09272428

Cited by 1 publication

(1 citation statement)

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“…Highest counts are often found in soil surfaces or in roots and rhizomes, and some studies related their growth peak with higher humidity [14] , [15] . Unfortunately, information on fungal diversity in mangrove rhizospheres, the soil zone located in and around the active roots, is lacking and is mostly based on culture-dependent assessments [16] , [17] , [18] . As is well known and widely reported, traditional culturing techniques only succeed in isolating a very limited percentage of microorganisms and fail to capture the full microbial diversity present in the environment [19] .…”

Section: Introductionmentioning

confidence: 99%

Soil and Rhizosphere Associated Fungi in Gray Mangroves (Avicennia Marina) from the Red Sea — A Metagenomic Approach

Simões

Antunes

Ottoni

et al. 2015

Genomics, Proteomics &Amp; Bioinformatics

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Covering a quarter of the world’s tropical coastlines and being one of the most threatened ecosystems, mangroves are among the major sources of terrestrial organic matter to oceans and harbor a wide microbial diversity. In order to protect, restore, and better understand these ecosystems, researchers have extensively studied their microbiology, yet few surveys have focused on their fungal communities. Our lack of knowledge is even more pronounced for specific fungal populations, such as the ones associated with the rhizosphere. Likewise, the Red Sea gray mangroves (Avicennia marina) remain poorly characterized, and understanding of their fungal communities still relies on cultivation-dependent methods. In this study, we analyzed metagenomic datasets from gray mangrove rhizosphere and bulk soil samples collected in the Red Sea coast, to obtain a snapshot of their fungal communities. Our data indicated that Ascomycota was the dominant phylum (76%–85%), while Basidiomycota was less abundant (14%–24%), yet present in higher numbers than usually reported for such environments. Fungal communities were more stable within the rhizosphere than within the bulk soil, both at class and genus level. This finding is consistent with the intrinsic patchiness in soil sediments and with the selection of specific microbial communities by plant roots. Our study indicates the presence of several species on this mycobiome that were not previously reported as mangrove-associated. In particular, we detected representatives of several commercially-used fungi, e.g., producers of secreted cellulases and anaerobic producers of cellulosomes. These results represent additional insights into the fungal community of the gray mangroves of the Red Sea, and show that they are significantly richer than previously reported.

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Section: Introductionmentioning

confidence: 99%