Publications by authors named "Samantha C Karunarathna"

China has a huge area of diverse landscapes and is believed to conceive incredibly high fungal diversity. To systematically and promptly report Chinese fungal species, we initiate the series of here. In the first paper of this series, we focus on plant-inhabiting fungi.

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species exhibit a wide range of ecological roles, including plant, animal, or human pathogens, as well as epiphytes, saprophytes, or endophytes, predominantly associated with cultivated cereals. In this study, several fungal isolates with similar characteristics in the genus were recovered from various poaceous hosts (Poales plants) in different locations in Iran during 2012‒2022. Based on the morphological characteristics and multilocus phylogeny of the translation elongation factor-1 alpha (), glyceraldehyde-3-phosphate dehydrogenase (), and the internal transcribed spacer (ITS-rDNA) genes, the studied isolates were assigned to five species, of which , sp.

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The evolution of a species can be understood in the context of two major concepts-the cryptic species concept and the phenotypic noise concept. The former represents morphologically indistinguishable but genetically distinct evolutionary lineages, while the latter represents the phenotypic variations of an isogenic population. Although the concept of cryptic species currently represents a general topic, its effect on other aspects of biology, such as biodiversity, ecology, evolutionary biology, and taxonomy, is still unclear.

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Macadamia trees, the most economically important Proteaceae perennial crop, are globally renowned for their edible nuts. During our surveys of microfungi associated with macadamia in China and Thailand, we isolated three saprobic fungi from dead macadamia branches. Our multigene phylogenetic analyses (ITS, LSU, SSU, 1-α, 2, and loci), genealogical concordance phylogenetic species recognition (GCPSR) with a pairwise homoplasy index (PHI) test, and morphological characteristics led to the discovery of two new species, and , and one new record, .

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plays an important role in the natural ecosystem and has significant economic value. Some species of this genus have been cultivated in Asia, America, and Europe. This study describes four edible species of , two of which were newly discovered.

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Saprobic fungi are known for their critical role in decomposition and nutrient cycling. The study of saprobic fungi is equally important, as it helps in understanding their ecological roles and identifying their hidden diversity. This study focused on saprobic fungi on , which is poorly studied compared to economically important hosts like coffee, tea, and rubber.

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Protoplasts are essential tools for genetic manipulation and functional genomics research in fungi. This study systematically optimized protoplast preparation conditions and examined transcriptional changes throughout the preparation and regeneration processes to elucidate the molecular mechanisms underlying the formation and regeneration of protoplasts in . The results indicated an optimal protoplast yield of 5.

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This study is based on three terrestrial saprobic fungi associated with in Guangdong and Yunnan provinces in China. All isolated species matched with generic concepts of . Detailed morphological characteristics and combined multigene phylogeny of LSU, SSU, and TEF revealed that the new isolates represent two new species ( and ), and one new host and geographical record ().

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Article Synopsis
  • Green mold disease is a significant concern for the production of an important edible mushroom in China, leading to economic losses.
  • Two new fungal pathogens were identified as responsible for this disease through analyses of certain genetic markers.
  • Pathogenicity tests confirmed the ability of these pathogens to cause symptoms similar to those seen in infected mushrooms, supporting their identification as the causal agents.
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This study aimed to investigate the morphological characteristics and phylogenetic relationships of three new species of from the southern parts of India. The analyses of the ITS and nLSU regions revealed the novelty of these species, which have been named , , and . All three species possess pileate basidiomes, a monomitic hyphal system in the context, and the presence of cystidioles and setae.

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(Omphalotaceae, Agaricales) specimens collected in Thailand were investigated based on morphological characteristics and molecular phylogenetic analyses. In the present study, two species are introduced as new to science, namely and . Phylogenetic analyses were carried out based on the internal transcribed spacer (nrITS) and nuclear ribosomal RNA large subunit (nrLSU) regions, and the results revealed that the two new taxa are distinct species within .

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is the third largest rust genus of the order with more than 200 described species. It is an important rust genus that has undergone tremendous taxonomic changes. This genus produces teliospores united into a head on a compound pedicel composed of two to several hyphae with autoecious, macro-, demi- to hemi-, and, more rarely, microcyclic modes of their life cycle which provide it a unique identity and have proved helpful in the identification of the genus.

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Article Synopsis
  • - Bats are a major group of mammals with a unique immune system and play a role in spreading diseases (zoonoses) and fungi, affecting plants, animals, and humans.
  • - In Yunnan Province, China, researchers identified 75 fungal species from bats, with 36 being known pathogens and 39 non-pathogenic; the majority (77%) belonged to the Ascomycota group.
  • - Although there have been studies on fungi associated with bats, there's a significant gap in research regarding their role as carriers of fungi, emphasizing the need to understand their ecological impact.
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During a survey of the diversity of lignicolous fungi in Yunnan Province, China, we collected and identified five microfungi species from dead woody litters of trees in terrestrial habitats. Through both morphological comparisons and phylogenetic analyses of multi-gene sequences, we identified two taxa as new species and three collections as new host records within Pleosporales. is introduced as a sexual morph in Lophiostomataceae, is introduced as a hyphomycetous fungi in Phaeoseptaceae, and as a first report of sexual morph in .

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Article Synopsis
  • The update discusses recent changes to affiliations, indicating shifts in relationships or partnerships.
  • It may outline the implications of these changes for involved parties, such as new opportunities or challenges.
  • The overall aim is to inform stakeholders about the current status and future directions related to the affiliations.
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Article Synopsis
  • Genetic studies on mushrooms are being transformed by CRISPR-Cas9 and RNA interference, enhancing our understanding of their roles in agriculture, medicine, and conservation.
  • CRISPR-Cas9 provides precise genome editing capabilities, while RNA interference helps improve crop yield and resistance to pests and diseases.
  • These innovations not only aid in the conservation of rare mushroom species but also hold potential for discovering new medicinal compounds and promoting sustainable cultivation practices.
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Phytopathogenic species pose a significant threat to global plant health, resulting in estimated annual economic losses exceeding USD (US Dollars) 68 billion in the agriculture and forestry sectors worldwide. To combat this pervasive menace effectively, a comprehensive understanding of the biology, ecology, and plant infection mechanisms of these pathogens is imperative. This comprehensive review critically examines various aspects of spp.

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The tropical areas in southern and south-western Yunnan are rich in fungal diversity. Additionally, the diversity of seed flora in Yunnan Province is higher than in other regions in China and the abundant endemic species of woody plants provide favourable substrates for fungi. Rubber plantations in Yunnan Province are distributed over a large area, especially in Xishuangbanna.

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During our investigation of saprophytic fungi in Guizhou and Hainan provinces, China, three hyphomycetes were collected from terrestrial and freshwater habitats. Based on morphological characteristics and phylogenetic analyses of combined ITS, LSU, 1-α, and 2 sequence data, two new species are introduced: and . Additionally, one known species, , previously unreported from , is newly reported.

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The complex, predominantly reported from East Asia, Mesoamerica and Caribbean countries, was circumscribed into as one of the new genera, based on morphological and phylogenetic data. The present paper describes four new species of from India. Morphological characteristics and phylogenetic analyses, based on ITS and nLSU data, delimited the new species, which are named , , and .

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(Lange) Imbach is the most widely cultivated mushroom in the world. wet bubble disease is one of the most severe diseases of white button mushrooms and is caused by the fungal pathogen . The pathogen causes a drastic reduction in mushroom yield because of malformation and deterioration of the basidiomes.

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Endophytic microbes are a ubiquitous group of plant-associated communities that colonize the intercellular or intracellular host tissues while providing numerous beneficial effects to the plants. All the plant species are thought to be associated with endophytes, majorly constituted with bacteria and fungi. During the last two decades, there has been a considerable movement toward the study of endophytes associated with coffee plants.

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Article Synopsis
  • The study identifies a new species of soil-borne fungi found in southwest China, which interacts with other fungal species as hosts.
  • The research expands the knowledge of fungal host relationships by documenting several new host records across species from China and Thailand.
  • Identification methods included morphological observations and genetic analysis of specific DNA regions, with detailed descriptions, illustrations, and phylogenetic trees provided for clarity.
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Fungi live different lifestyles-including pathogenic and symbiotic-by interacting with living plants. Recently, there has been a substantial increase in the study of phytopathogenic fungi and their interactions with plants. Symbiotic relationships with plants appear to be lagging behind, although progressive.

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