Microfungi on Dracaena and Rhododendron in limestone outcrop areas

Name: Napalai Chaiwan

keyword: Ascomycota

ThaSH: Fungi

; China

ThaSH: Fungi -- Classification

; Dothideomycetes

ThaSH: Taxonomy

; Dracaena

ThaSH: Phylogeny

; Italy

ThaSH: Fungi -- Phylogeny

; Phylogeny

ThaSH: Biology -- Classification

; Rhododendron

; Russia

; Saprobic

; Sordariomycetes

; Taxonomy

Abstract: Limestone outcrops are a special type of landscape that is formed by the dissolution of soluble rocks. It is a geologic formation shaped by rocky desertification of soluble rock, characterized by calcium-rich, phosphorus-limited, slightly alkaline, soil-eroded, land degradation. Many countries obtained species of fungi from limestone outcrops (India, Slovakia) and this specific area comprises a high diversity of fungi. Limestone outcrops in Southwest China are one of the largest areas. They are rich in biodiversity, with many plant species. Thailand has high mountains of limestone outcrops in Chiang Mai and south of Thailand. There have been several taxonomic studies of microfungi on dicotyledon and monocotyledon plants. Dracaena is a monocotyledon plant which belongs to Agavaceae and consists of about 550–600 species in 18 genera. Dracaena is found in South and Southeast Asia. Rhododendron is a dicotyledon plant which belongs to Ericaceae. Rhododendron distribution is found in Southeast Asia. Microfungi on Dracaena and Rhododendron have long been studied based on morphological characteristics while few studies have been done based on both morphology and phylogeny. Both plant hosts can be found in Southeast Asia. The saprobic fungi are mainly known as decomposers of organic matter and the activity of these organisms is essential for the endless functioning of the earth’s ecosystems as the producers of nutrients. In this study, we focused on saprobic fungi on Dracaena and Rhododendron from China and Thailand and their characterization was based on both morphological and multi-gene molecular phylogenies. Twelve known saprobic species from Dracaena: Bipolaris coffeana, Colletotrichum dracaenophilum, Colletotrichum gigasporum, Colletotrichum truncatum, Curvularia lunata, Lasiodiplodia thailandica, Longididymella clematidis, Malaysiasca phaii, Ochroconis musae, Sarcopodium vanilla, Zasmidium citrigriseum and Zasmidium mansonii and twelve novel species: Cladosporium dracaenae, Cladosporium dracaenicola, Colletotrichum dracaenae-marginatae, Colletotrichum dracaenigenum, Lasiodiplodia dracaenae, Lasiodiplodia dracaenigenum, Neoleptosporella camporesiana, Pestalotiopsis dracaenicola, Septorioidaplosporella dracaenae, Torula dracaenae, Zygosporium dracaenae and Zygosporium dracaenicola were studied. Six saprobic species from Rhododendron: Cladosporium anthropophilum, Cladosporium tenuissimum, Colletotrichum gloeosporioides, Colletotrichum karsti, Colletotrichum godetiae and Diaporthe nobilis and including four novel species: Colletotrichum dracaenigenum, Discosia rhododendricola, Neokalmusia rhododendronicola, Neopestalotiopsis rhododendricola were studied. For all these species detailed descriptions, the geographical distribution of species and notes with updated phylogenetic trees are provided. The Greater Mekong Subregion is a biodiversity hotspot including Yunnan Province, China and Thailand. During the last few decades, microfungi from the Greater Mekong Subregion on different substrates have been рuƅlished and reclassified, and many new species have been introduced. The available data have not been integrated into a specific platform where all data can be easily retrieved. The webpage https://gmsmicrofungi.org: is an onlіne database providing updated information on microfungi in the Greater Mekong Subregion. This ѡеbsitе is a portal to comprehensive information on microfungi and updated notes of species reроrted from the Greater Mekong Subregion, with easily аᴄᴄessible and searchable functions. In addition, Six new species Calophoma humulicola, Cytospora fraxiicola, Cytospora rosigena, Cytospora salicis-albae, Nodulosphaeria aquilegiae, Uzbekistanica pruni, and Nodulosphaeria aquilegiae, a new record from Italy and Russia have been included in the study and provided an updated nomenclature based on both morphological and multi-gene molecular phylogenies.

; Thailand

Mae Fah Luang University. Learning Resources and Educational Media Center

Address: CHIANG RAI

Email: library@mfu.ac.th

Name: Hyde, Kevin David,

Role: Advisor

Modified: 2567-01-29

Issued: 2023-04-08

วิทยานิพนธ์/Thesis

application/pdf

eng

DegreeName: Doctor of Philosophy

Level: Doctoral Degree

Descipline: Biological Sciences

Grantor: Mae Fah Luang University

©copyrights Mae Fah Luang University

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