Potential roles of marine fungi in the decomposition process of standing stems and leaves of <i>Spartina maritima</i>

Calado, Maria da Luz; Carvalho, Luís; Barata, Margarida; Pang, Ka−Lai

doi:10.1080/00275514.2019.1571380

Cited by 18 publications

(16 citation statements)

References 48 publications

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“…Halobyssothecium obiones is frequently reported on Spartina stems, which plays a major role in the breakdown of lignocellulosic secondary walls of plant cells and nutrient recycling (Gessner and Goos 1973 ; Newell et al 1995 ; Barata 2002 ; Calado et al 2015 , 2019 ). Our collection of Halobyssothecium obiones on Spartina sp.…”

Section: Resultsmentioning

confidence: 99%

“…and sea grass species of Halodule, Thalassia and Zostera occur (Teal 1962 ; Christian et al 1990; Newell et al 1995 ; Van Ryckegem et al 2006 ; Calado and Barata 2012 ; Dayarathne et al 2019 ). Salt marshes are distributed worldwide and are recognised as a most productive costal ecosystem, with a vital role in nutrient recycling and shoreline protection (Gessner and Kohlmeyer 1976 ; Newell et al 1995 ; Newell 1996 ; Calado et al 2015 , 2019 ). Studies on salt marsh plants, such as Spartina alterniflora, Juncus roemerianus and Phragmites australis , have been shown to support a great diversity of marine fungi akin to many mangrove plants (Fell and Hunter 1979 ; Cuomo et al 1982 , 1985 ; Poon and Hyde 1998 ; Barata 2002 ; Kohlmeyer and Volkmann-Kohlmeyer 2002 ; Wong and Hyde 2002 ; Van Ryckegem and Verbeken 2005 ; Calado and Barata 2012 ; Jones et al 2019 ).…”

Section: Introductionmentioning

confidence: 99%

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Molecular data reveals a new holomorphic marine fungus, Halobyssothecium estuariae, and the asexual morph of Keissleriella phragmiticola

et al. 2019

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This study introduces a novel holomorphic marine fungal species, Halobyssothecium estuariae (Lentitheciaceae, Pleosporales), from dead Phragmites communis. The new species has semiimmersed, subglobose or ellipsoidal, papillate, conical ascomata, clavate to subcylindrical, short pedicellate asci and 3-septate, fusoid to ellipsoidal ascospores with rounded ends, pale brown to dark brown central cells and hyaline end cells. The asexual morph has multiseptate, filiform, intercalary, catenate, branched chlamydospores that resemble Xylomyces. The asexual morph of Keissleriella phragmiticola based on combined LSU, SSU, ITS and TEF1 sequence analyses is reported. The role of molecular identification in delineating cryptic species are also discussed.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Molecular data reveals a new holomorphic marine fungus, Halobyssothecium estuariae, and the asexual morph of Keissleriella phragmiticola

et al. 2019

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“…Halobyssothecium obiones was recorded from six species of Spartina ( S. alterniflora [ 20 , 35 , 52 , 61 , 71 , 74 , 80 , 81 , 82 ], S. cynosuroides [ 35 ], S. densiflora [ 64 ], S. maritima [ 31 , 54 , 59 , 63 ], S. patens [ 36 ], S. townsendii [ 49 , 65 ], and the unidentified Spartina sp. [ 32 , 35 , 36 , 58 , 84 ]), while six Spartina spp.…”

Section: Diversity Of Fungi In Halophytesmentioning

confidence: 99%

“…Bacterial communities are the major decomposers in the latter stage of decomposition [ 27 , 28 ]. Studies in salt marsh ecosystems not only consider microbial activity and the recycling of nutrients, but also bacterial [ 29 , 30 ] and fungal diversity [ 20 , 31 , 32 ].…”

Section: Introductionmentioning

confidence: 99%

Fungal Biodiversity in Salt Marsh Ecosystems

Calabon

Jones

Promputtha

et al. 2021

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This review brings together the research efforts on salt marsh fungi, including their geographical distribution and host association. A total of 486 taxa associated with different hosts in salt marsh ecosystems are listed in this review. The taxa belong to three phyla wherein Ascomycota dominates the taxa from salt marsh ecosystems accounting for 95.27% (463 taxa). The Basidiomycota and Mucoromycota constitute 19 taxa and four taxa, respectively. Dothideomycetes has the highest number of taxa, which comprises 47.12% (229 taxa), followed by Sordariomycetes with 167 taxa (34.36%). Pleosporales is the largest order with 178 taxa recorded. Twenty-seven genera under 11 families of halophytes were reviewed for its fungal associates. Juncus roemerianus has been extensively studied for its associates with 162 documented taxa followed by Phragmites australis (137 taxa) and Spartina alterniflora (79 taxa). The highest number of salt marsh fungi have been recorded from Atlantic Ocean countries wherein the USA had the highest number of species recorded (232 taxa) followed by the UK (101 taxa), the Netherlands (74 taxa), and Argentina (51 taxa). China had the highest number of salt marsh fungi in the Pacific Ocean with 165 taxa reported, while in the Indian Ocean, India reported the highest taxa (16 taxa). Many salt marsh areas remain unexplored, especially those habitats in the Indian and Pacific Oceans areas that are hotspots of biodiversity and novel fungal taxa based on the exploration of various habitats.

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“…Fungi in the family Lulworthiaceae have been isolated from a variety of substrates and environments. Some examples include corals (Góes-Neto et al, 2020), plants located in salt marches (Calado et al, 2019), seagrass (Poli et al, 2020), Portuguese marinas (Azevedo et al, 2017), sandy beaches of the Cozumel island in Mexico (Velez et al, 2015), brown seaweed (Zuccaro et al, 2008), and driftwood (Rämä et al, 2014). The distribution of Lulworthiales fungi in marine habitats has been studied throughout the history of marine mycology (Johnson, 1958;Kohlmeyer et al, 2000;Koch et al, 2007;Rämä et al, 2014;Azevedo et al, 2017;Góes-Neto et al, 2020), but the biosynthetic potential of these fungi has not been investigated, most likely due to the special knowledge required for their isolation (Overy et al, 2019) and low growth rates.…”

Section: Introductionmentioning

confidence: 99%

Lulworthinone, a New Dimeric Naphthopyrone From a Marine Fungus in the Family Lulworthiaceae With Antibacterial Activity Against Clinical Methicillin-Resistant Staphylococcus aureus Isolates

et al. 2021

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The emergence of drug-resistant bacteria is increasing rapidly in all parts of the world, and the need for new antibiotics is urgent. In our continuous search for new antimicrobial molecules from under-investigated Arctic marine microorganisms, a marine fungus belonging to the family Lulworthiaceae (Lulworthiales, Sordariomycetes, and Ascomycota) was studied. The fungus was isolated from driftwood, cultivated in liquid medium, and studied for its potential for producing antibacterial compounds. Through bioactivity-guided isolation, a novel sulfated biarylic naphtho-α-pyrone dimer was isolated, and its structure was elucidated by spectroscopic methods, including 1D and 2D NMR and HRMS. The compound, named lulworthinone (1), showed antibacterial activity against reference strains of Staphylococcus aureus and Streptococcus agalactiae, as well as several clinical MRSA isolates with MICs in the 1.56–6.25 μg/ml range. The compound also had antiproliferative activity against human melanoma, hepatocellular carcinoma, and non-malignant lung fibroblast cell lines, with IC50 values of 15.5, 27, and 32 μg/ml, respectively. Inhibition of bacterial biofilm formation was observed, but no eradication of established biofilm could be detected. No antifungal activity was observed against Candida albicans. During the isolation of 1, the compound was observed to convert into a structural isomer, 2, under acidic conditions. As 1 and 2 have high structural similarity, NMR data acquired for 2 were used to aid in the structure elucidation of 1. To the best of our knowledge, lulworthinone (1) represents the first new bioactive secondary metabolite isolated from the marine fungal order Lulworthiales.

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Potential roles of marine fungi in the decomposition process of standing stems and leaves of Spartina maritima

Cited by 18 publications

References 48 publications

Molecular data reveals a new holomorphic marine fungus, Halobyssothecium estuariae, and the asexual morph of Keissleriella phragmiticola

Molecular data reveals a new holomorphic marine fungus, Halobyssothecium estuariae, and the asexual morph of Keissleriella phragmiticola

Fungal Biodiversity in Salt Marsh Ecosystems

Lulworthinone, a New Dimeric Naphthopyrone From a Marine Fungus in the Family Lulworthiaceae With Antibacterial Activity Against Clinical Methicillin-Resistant Staphylococcus aureus Isolates

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