scholarly journals Morphological and Phylogenetic Analyses Reveal a New Species of Ceratocystiopsis (Ophiostomataceae, Ophiostomatales) Associated with Ips subelongatus in Inner Mongolia (China) with Weak Host Pathogenicity

Forests ◽  
2021 ◽  
Vol 12 (12) ◽  
pp. 1795
Author(s):  
Zheng Wang ◽  
Ya Liu ◽  
Caixia Liu ◽  
Zhenyu Liu ◽  
Lijun Liang ◽  
...  
Keyword(s):  
Dna Sequences ◽  
Inner Mongolia ◽  
Bark Beetles ◽  
Phylogenetic Analyses ◽  
Morphological Characteristics ◽  
Optimal Growth ◽  
Ophiostomatoid Fungi ◽  
Main Host ◽  
Asexual State ◽  
Ips Subelongatus

Ophiostomatoid fungi are known for their associations with bark beetles, and some species are important sources of tree diseases. Ceratocystiopsis is a genus of the ophiostomatoid fungi in order Ophiostomatales. The shortage of DNA barcodes for many species in this genus has resulted in the presence of many unnamed cryptic species. In this study, Ceratocystiopsis subelongati sp. nov. associated with Ips subelongatus infesting Pinus sylvestris var. mongolica in Inner Mongolia, China, was identified and described based on phylogenetic inference of multi-gene DNA sequences and morphological characteristics. The species is characterized by a hyalorhinocladiella- to sporothrix-like asexual state and an optimal growth temperature of 30 °C. Artificial inoculation tests in the field showed that it is mildly pathogenic to five-year-old larch trees, the main host of I. subelongatus. It is also the first described Ceratocystiopsis species associated with I. subelongatus in China. This discovery should provide new avenues for studying the symbiosis between bark beetles and ophiostomatoid fungi.

scholarly journals Differential patterns of ophiostomatoid fungal communities associated with three sympatric Tomicus species infesting pines in south-western China, with a description of four new species

MycoKeys ◽  
2019 ◽  
Vol 50 ◽  
pp. 93-133 ◽  
Author(s):  
Wang HuiMin ◽  
Zheng Wang ◽  
Fu Liu ◽  
Cheng Xu Wu ◽  
Su Fang Zhang ◽  
...  
Keyword(s):  
Dna Sequences ◽  
Bark Beetles ◽  
Phylogenetic Analyses ◽  
Large Subunit ◽  
Forest Health ◽  
Elongation Factor ◽  
Distinct Species ◽  
Western China ◽  
Ophiostomatoid Fungi ◽  
Additional Species

Bark beetles and their associated fungi, which cause forest decline and sometimes high mortality in large areas around the world, are of increasing concern in terms of forest health. ThreeTomicusspp. (T.brevipilosus,T.minorandT.yunnanensis) infect branches and trunks ofPinusyunnanensisandP.kesiyain Yunnan Province, in south-western China.Tomicusspp. are well known as vectors of ophiostomatoid fungi and their co-occurrence could result in serious ecological and economic impact on local forest ecosystems. Nonetheless, knowledge about their diversity, ecology, including pathogenicity and potential economic importance is still quite rudimentary. Therefore, an extensive survey of ophiostomatoid fungi associated with theseTomicusspecies infestingP.yunnanensisandP.kesiyawas carried out in Yunnan. Seven hundred and seventy-two strains of ophiostomatoid fungi were isolated from the adult beetles and their galleries. The strains were identified based on comparisons of multiple DNA sequences, including the nuclear ribosomal large subunit (LSU) region, the internal transcribed spacer regions 1 and 2, together with the intervening 5.8S gene (ITS) and the partial genes of β-tubulin (TUB2), elongation factor 1α (TEF1-α) and calmodulin (CAL). Phylogenetic analyses were performed using maximum parsimony (MP) as well as maximum likelihood (ML). Combinations of culture features, morphological characters and temperature-dependent growth rates were also employed for species identification. Eleven species belonging to five genera were identified. These included six known species,Esteyavermicola,Leptographiumyunnanense,Ophiostomabrevipilosi,O.canum,O.minusandO.tingensand four novel taxa, described asGraphilbumanningense,O.aggregatum,SporothrixpseudoabietinaandS.macroconidia. A residual strain was left unidentified asOphiostomasp. 1. The overall ophiostomatoid community was by far dominated by three species, representing 87.3% of the total isolates; in decreasing order, these wereO.canum,O.brevipilosiandO.minus. Furthermore, the ophiostomatoid community of each beetle, although harbouring a diversity of ophiostomatoid species, was differentially dominated by a single fungal species;Ophiostomacanumwas preferentially associated with and dominated the ophiostomatoid community ofT.minor, whereasO.brevipilosiandO.minuswere exclusively associated with and dominated the ophiostomatoid communities ofT.brevipilosusandT.yunnanensis, respectively. Eight additional species, representing the remaining 12.7% of the total isolates, were marginal or sporadic. These results suggested that sympatricTomicuspopulations are dominated by distinct species showing some level of specificity or even exclusivity.

scholarly journals Descriptions of four new dextral land snails of the genus Camaena (Gastropoda, Eupulmonata, Camaenidae) from south China

ZooKeys ◽  
2020 ◽  
Vol 996 ◽  
pp. 37-58
Author(s):  
Pei Wang ◽  
Mei-Ling Hu ◽  
Jun-Hong Lin ◽  
Hai-Fang Yang ◽  
Xiao-Jing Li ◽  
...  
Keyword(s):  
New Species ◽  
South China ◽  
Dna Sequences ◽  
Reproductive System ◽  
Phylogenetic Analyses ◽  
Morphological Characteristics ◽  
Land Snails ◽  
Shell Morphology ◽  
Molecular Phylogenetic ◽  
Living Environments

In this study, four new dextral camaenid from China are reported, based on shell morphology, reproductive system anatomy, and molecular phylogenetic analyses: Camaena funingensis Zhou, Wang & Lin, sp. nov., Camaena gaolongensis Zhou, Wang & Lin, sp. nov., Camaena maguanensis Zhou, Wang & Hu, sp. nov., and Camaena yulinensis Zhou, Wang & Hu, sp. nov. Detailed descriptions of the morphological characteristics including shells and genitalia, DNA sequences, and living environments of the four new species are provided, with further comparisons with congeners.

scholarly journals Molecular and morphological evidence reveal a new genus and species in Auriculariales from tropical China

MycoKeys ◽  
2018 ◽  
Vol 35 ◽  
pp. 27-39 ◽  
Author(s):  
Hai-Sheng Yuan ◽  
Xu Lu ◽  
Cony Decock
Keyword(s):  
New Species ◽  
Dna Sequences ◽  
Type Species ◽  
New Genus ◽  
Phylogenetic Analyses ◽  
Strong Support ◽  
Morphological Characteristics ◽  
Morphological Evidence ◽  
New Genus And Species ◽  
Tropical China

Grammatuslabyrinthinusgen. et sp. nov. is proposed based on DNA sequences data and morphological characteristics. It is known so far from southern, tropical China. The new species is characterised by an annual, resupinate basidiocarp with a shallow, subporoid hymenophore, a hymenium restricted to the bottom of the tubes, a dimitic hyphal system, presence of encrusted skeletocystidia and dendrohyphidia, longitudinally septate basidia and smooth, oblong-ellipsoid to cylindrical, acyanophilous basidiospores. Phylogenetic analyses based on ITS + nLSU DNA sequences data indicate that G.labyrinthinus belongs to Auriculariaceae in which it has an isolated position. Phylogenetic inferences show G.labyrinthinus to be related to Heteroradulum. However, the ITS sequences similarity between G.labyrinthinus and H.kmetii, the type species of Heteroradulum, were 89.84% and support the establishment of the new genus. Inversely, Heteroradulumsemis clustered with G.labyrinthinus with strong support and it is transferred to Grammatus.

Molecular and morphological diagnostic markers for the Himalayan Ips DeGeer species (Coleoptera: Curculionidae: Scolytinae)

Zootaxa ◽  
2011 ◽  
Vol 3128 (1) ◽  
pp. 47 ◽  
Author(s):  
ABDUL A. BUHROO ◽  
FERENC LAKATOS
Keyword(s):  
Dna Sequences ◽  
Bark Beetles ◽  
Phylogenetic Analyses ◽  
Sequence Divergence ◽  
Morphological Characters ◽  
The Body ◽  
Specific Sequence ◽  
Haplotype Variation ◽  
Mitochondrial Cytochrome Oxidase ◽  
I Gene

Morphological and molecular analyses of Ips bark beetles collected in the eastern and northwestern Himalayan area resulted in the diagnosis of three species—Ips stebbingi, I. longifolia and I. schmutzenhoferi. These three species can be distinguished by morphological characters, including the frontal setae, the body size and the shape and position of the spines on the elytral declivity. DNA sequences of the mitochondrial Cytochrome Oxidase I gene were analyzed to detect haplotype variation within each of the species. A phylogenetic analysis was performed on our data plus data from GenBank. Considerable amount of intra-specific sequence divergence was found in I. longifolia, ranging between 0.2%−2.5%. Intra-specific sequence divergence in I. stebbingi ranged from 0.2%−1.1% and in I. schmutzenhoferi it varied by 0.2%. Interspecific sequence divergence was high among the three species: 7.4−8.6% between I. longifolia and I. stebbingi, 11.9−12.2% between I. stebbingi and I. schmutzenhoferi, and 11.5−12.6% between I. longifolia and I. schmutzenhoferi. Phylogenetic analyses revealed Himalayan Ips species to be monophyletic and unrelated to other Asian species. Ips stebbingi and I. longifolia were sister taxa and I. schmutzenhoferi was distinguished from I. stebbingi.

scholarly journals Filamentous Fungi and Yeasts Associated with Mites Phoretic on Ips typographus in Eastern Finland

Forests ◽  
2021 ◽  
Vol 12 (6) ◽  
pp. 743
Author(s):  
Riikka Linnakoski ◽  
Ilmeini Lasarov ◽  
Pyry Veteli ◽  
Olli-Pekka Tikkanen ◽  
Heli Viiri ◽  
...  
Keyword(s):  
Filamentous Fungi ◽  
Dna Sequences ◽  
Yeast Species ◽  
Phylogenetic Analyses ◽  
Fungal Species ◽  
Ips Typographus ◽  
Ophiostomatoid Fungi ◽  
Spruce Bark ◽  
Blue Stain ◽  
Fungal Associates

The European spruce bark beetle (Ips typographus) has become a major forest pest in Finland in recent years. The beetle is a well-known vector of mainly ophiostomatoid fungi causing blue-stain of timber and pathogens that have the ability to amplify the insect damage. It also vectors other associated organisms, such as phoretic mites. The ecology of these mites remains poorly understood, including their associations with fungi. In this study, we considered filamentous fungi and yeasts associated with mites phoretic on I. typographus. Fungal identifications were based on DNA sequences and phylogenetic analyses of the ITS and/or partial β-tubulin gene regions. Fifteen fungal species were detected, including eight yeasts and seven filamentous fungi. Eleven percent of the beetles carried mites and of these 74% carried at least one fungal species. An average of two fungal species were carried per mite. The most commonly found filamentous fungi were Grosmannia penicillata (25%), Ophiostoma bicolor (19%), O. ainoae (12%) and O. brunneolum (12%). Of the yeast species, the most commonly found was Wickerhamomyces bisporus (47%). This study is the first to report yeasts associated with I. typographus and its phoretic mites in Finland. Majority of the filamentous fungal species found are those previously reported in association with I. typographus. The results also confirmed that many of the fungal species commonly found on I. typographus are also associated with its phoretic mites. However, the nature of the symbiosis between the mites, beetles and fungal associates remains to be understood.

scholarly journals Identification of Colletotrichum Species Associated with Blueberry Anthracnose in Sichuan, China

Pathogens ◽  
2020 ◽  
Vol 9 (9) ◽  
pp. 718
Author(s):  
Xuan Liu ◽  
Xiaojuan Zheng ◽  
Muhammad Ibrahim Khaskheli ◽  
Xiaofang Sun ◽  
Xiaoli Chang ◽  
...  
Keyword(s):  
Dna Sequences ◽  
Phylogenetic Analyses ◽  
Morphological Characteristics ◽  
Economic Losses ◽  
Single Spore ◽  
Purification Method ◽  
Colletotrichum Fructicola ◽  
Pathogenicity Tests ◽  
Colletotrichum Spp ◽  
Important Disease

Anthracnose caused by Colletotrichum spp. is an important disease of blueberries and results in large economic losses for blueberry growers. Samples of anthracnose were collected from six main blueberry cultivation areas in Sichuan Province. In total, 74 Colletotrichum isolates were obtained through a single-spore purification method and identified to the species through morphological characteristics and phylogenetic analyses based on partial DNA sequences of glyceraldehyde-3-phosphate dehydrogenase (GAPDH), internal transcribed spacer (ITS) regions, and the β-tubulin (TUB2), actin (ACT) and calmodulin (CAL) genes. Among all species, Colletotrichum fructicola was the most dominant species, with an isolation percentage of up to 66.2% in Sichuan, followed by Colletotrichum siamense (17.6%), C. kahawae (5.4%), C. karstii (5.4%), C. nymphaeae (2.7%) and C. sichuaninese (2.7%). Pathogenicity tests showed all species were able to cause typical anthracnose symptoms on blueberry leaves and stems. Colletotrichum fructicola was the predominant species with strong aggressiveness. Moreover, C. fructicola, C. kahawae, C. sichuaninese and C. nymphaeae are first reported here to cause blueberry anthracnose. This study provides a comprehensive reference for the association of different Colletotrichum spp., which may support the sustainable management of blueberry anthracnose.

scholarly journals Ophiostomatoid fungi vectored by bark beetles and colonizing trees of Pinus sylvestris in Sumy region (Ukraine)

2020 ◽  
pp. 22-29
Author(s):  
Kateryna Davydenko ◽  
Denys Baturkin
Keyword(s):  
Pinus Sylvestris ◽  
Scots Pine ◽  
Bark Beetle ◽  
Dna Sequences ◽  
Bark Beetles ◽  
Forest Damage ◽  
Ophiostomatoid Fungi ◽  
Primary Role ◽  
Pine Seedlings ◽  
Pine Trees

K. Davydenko[1], D. Baturkin[2] Intensive mortality of Pinus sylvestris trees has recently been observed in the Sumy region in eastern Ukraine. There are two pine bark beetle species (Ips acuminatus and Ips sexdentatus), which spread resulted in considerable forest damage in Ukraine. The study of ophiostomatoid fungi vectored by bark beetles is very important to assess total harm of these insects. Therefore, the aim of our research was i) to identify ophiostomatoid fungi associated with weakened and dying Scots pine trees infested by bark beetles in the Sumy region; ii) to test the pathogenicity of these ophiostomatoid fungi to evaluate their potential threat to Scots pine. The fungi were isolated from bark beetle galleries and identified based on morphological properties and DNA sequences. In total, eight ophiostomatoid fungi (Graphium sp., Grosmannia sp.1, Ophiostoma bicolor, O. ips, O. canum, O. piceae, O. minus, Ophiostoma sp.1) were isolated from Scots pine trees infested by bark beetles. Scots pine seedlings were inoculated with eight fungi and sterile medium (control) to evaluate their pathogenicity. The inoculated seedlings were examined finally in 6 month after inoculation. Inoculation with O. minus produced significantly largest lesions and only this fungus caused mortality of pine seedlings. In total, all eight fungal species inoculated caused resin exudation and staining the bark around inoculations in Scots pine seedlings and five fungi caused different rate of seedlings decline. The size of stained sapwood was also greater following O. minus inoculations than other fungi or the control. All ophiostomatoid fungi caused significantly longer necrotic lesions and more occlusions in the sapwood than the controls. Therefore, based on the ability of various ophiostomatoid fungi to weaken and kill pine seedlings and stain sapwood, O. minus was the most dangerous species for Scots pine trees, followed by Graphium sp. and Ophiostoma sp.1. The occurrence of ophiostmatoid fungi in the sapwood of Scots pine is consistent with the concept of their primary role in the colonization of the fresh sapwood of trees in the succession of microorganisms during wood decay.    

scholarly journals A simple PCR-based approach for rapid detection of Ips typographus and Ips duplicatus in the presence of (associated) symbionts and parasites

2020 ◽  
Author(s):  
Matthias Becker ◽  
Stephan König ◽  
Björn Hoppe
Keyword(s):  
Dna Sequences ◽  
Bark Beetles ◽  
Insect Pests ◽  
Plant Protection ◽  
Phylogenetic Analyses ◽  
Dna Amplification ◽  
Marker Genes ◽  
Individual Organism ◽  
Ips Duplicatus ◽  
Mediterranean Plant

Abstract In plant pest diagnosis, Sanger sequencing of marker genes (DNA-barcoding) is the most applied and appropriate method for the identification of insects. Standard PM7/129 of the European and Mediterranean Plant Protection Organization (EPPO) includes a number of primers and PCR protocols for diagnosing insect pests. LCO1490 and HCO2198 primers recommended herein were shown to be excellent tools for amplifying a fragment of the COI gene from a vast range of arthropods. The COI barcoding region is available for thousands of arthropod taxa in public databases and ready-to-use for evolutionary studies. However, we found that LCO1490 and HCO2198 primers are not working for bark beetles of genus Ips. The attempt to amplify this gene fragment from an individual organism using the barcoding primers led to DNA amplification of associated wasps and nematodes, which were apparently vectored by the beetle. Thus, new primers for Ips that bind specifically to another (non-barcoding) region of the COI gene were developed in the past years. These primers were successfully applied in phylogenetic analyses of this genus, resulting in the adverse effect that COI-based Ips phylogenies cannot be expanded to higher systematic categories without sequencing the outgroups (as they are not available in databases yet). Here we provide new primers for Ips that differ significantly from DNA sequences of Ips-associated wasps and nematodes and bind to a COI fragment that largely overlaps with the barcoding region proposed in the EPPO standard. Furthermore, using these primers we developed a quick PCR-based test for detecting Ips duplicatus, a quarantine pest currently emerging in many European countries.

Phylogenetic, Morphological, and Pathogenic Characterization of Alternaria Species Associated with Fruit rot of Mandarin in California

Plant Disease ◽  
2020 ◽  
Author(s):  
Fei Wang ◽  
Seiya Saito ◽  
Themis Michailides ◽  
Chang-Lin Xiao
Keyword(s):  
Phylogenetic Analysis ◽  
Rna Polymerase Ii ◽  
Dna Sequences ◽  
Phylogenetic Analyses ◽  
Morphological Characteristics ◽  
Central Valley ◽  
Fruit Rot ◽  
Postharvest Diseases ◽  
Plasma Membrane Atpase ◽  
Alternaria Species

Alternaria rot caused by Alternaria species is one of the major postharvest diseases of mandarin fruit in California. The aims of this study were to identify these Alternaria species using phylogenetic analyses and morphological characteristics and test their pathogenicity to mandarin. Decayed mandarin fruit exhibiting Alternaria rot symptoms were collected from three citrus fruit packinghouses in the Central Valley of California. In total, 177 Alternaria isolates were obtained from decayed fruit and preliminarily separated into three groups representing three species (A. alternata, A. tenuissima and A. arborescens) based on the colony characterization and sporulation patterns. To further identify these isolates, phylogenetic analysis was conducted based on DNA sequences of the second largest subunit of RNA polymerase II (RPB2), plasma membrane ATPase (ATPase) and Calmodulin gene regions in combination with morphological characters. Of the 177 isolates, 124 isolates (70.1%) were identified as A. alternata and 53 isolates (29.9 %) were A. arborescens. The isolates initially identified as A. tenuissima based on the morphological characteristics could not be separated from those of A. alternata in phylogenetic analysis and thus considered A. alternata. Pathogenicity tests showed that both Alternaria species were pathogenic on mandarin fruit at both 5°C and 20°C. Our results indicated that two Alternaria species, A. alternata and A. arborescens, were responsible for Alternaria rot of mandarin fruit in California with A. arborescens causing fruit rot on mandarin being reported for the first time.

scholarly journals New Species of Talaromyces (Fungi) Isolated from Soil in Southwestern China

Biology ◽  
2021 ◽  
Vol 10 (8) ◽  
pp. 745
Author(s):  
Zhi-Kang Zhang ◽  
Xin-Cun Wang ◽  
Wen-Ying Zhuang ◽  
Xian-Hao Cheng ◽  
Peng Zhao
Keyword(s):  
New Species ◽  
Dna Sequences ◽  
Growth Rates ◽  
Phylogenetic Analyses ◽  
Morphological Characteristics ◽  
Soil Samples ◽  
Southwestern China ◽  
Biodiversity Hotspots ◽  
Conservation Areas ◽  
Global Biodiversity

Southwestern China belongs among the global biodiversity hotspots and the Daba Mountains are recognized as one of the priority conservation areas. During the exploration of fungal biodiversity from soil samples collected from Mount Daba, two species of Talaromyces were discovered as new to science based on phylogenetic analyses and morphological comparisons. Talaromyces chongqingensis sp. nov. is a sister taxon of T. minioluteus and T. minnesotensis in the section Trachyspermi; and T. wushanicus sp. nov., affiliated to the section Talaromyces, is closely related to T. cnidii and T. siamensis. The new species differ from their sisters in DNA sequences, growth rates, and morphological characteristics. Descriptions and illustrations of them are provided in detail.

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