Short communication: Dieback of rose caused by Acremonium sclerotigenum as a new causal agent of rose dieback in Iran

Mirtalebi, Maryam; Banihashemi, Z.; Sabahi, Fatemeh; Mafakheri, Hamze

doi:10.5424/sjar/2016144-9763

Cited by 5 publications

(5 citation statements)

References 20 publications

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“…Koch’s postulates were again fulfilled for A. egyptiacum as a causal agent of rose dieback in Iran’s Fars province [ 38 ]. Both isolates sequenced in the study (GenBank KU532330, KU532331) conformed to ITS barcode type 1 and had conidia in mucoid heads.…”

Section: Discussionmentioning

confidence: 99%

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The Protean Acremonium. A. sclerotigenum/egyptiacum: Revision, Food Contaminant, and Human Disease

et al. 2018

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Acremonium is known to be regularly isolated from food and also to be a cause of human disease. Herein, we resolve some sources of confusion that have strongly hampered the accurate interpretation of these and other isolations. The recently designated type species of the genus Acremonium, A. alternatum, is known only from a single isolate, but it is the closest known relative of what may be one of the planet’s most successful organisms, Acremonium sclerotigenum/egyptianum, shown herein to be best called by its earliest valid name, A. egyptiacum. The sequencing of ribosomal internal transcribed spacer (ITS) regions, actin genes, or both for 72 study isolates within this group allowed the full range of morphotypes and ITS barcode types to be elucidated, along with information on temperature tolerance and habitat. The results showed that nomenclatural confusion and frequent misidentifications facilitated by morphotaxonomy, along with misidentified early sequence deposits, have obscured the reality that this species is, in many ways, the definitive match of the historical concept of Acremonium: a pale orange or dull greenish-coloured monophialidic hyphomycete, forming cylindrical, ellipsoidal, or obovoid conidia in sticky heads or obovoid conidia in dry chains, and acting ecologically as a soil organism, marine organism, plant pathogen, plant endophyte, probable insect pathogen, human opportunistic pathogen, food contaminant, probable dermatological communicable disease agent, and heat-tolerant spoilage organism. Industrially, it is already in exploratory use as a producer of the antibiotic ascofuranone, active against trypanosomes, cryptosporidia, and microsporidia, and additional applications are in development. The genus-level clarification of the phylogeny of A. egyptiacum shows other historic acremonia belong to separate genera, and two are here described, Parasarocladium for the Acremonium radiatum complex and Kiflimonium for the Acremonium curvulum complex.

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Section: Discussionmentioning

confidence: 99%

“…A. egyptiacum has elevated heat tolerance: it is able to survive 90 °C heat treatment for 50 min [ 49 ]. Its production of sclerotia probably significantly increases its ability to survive under adverse conditions [ 38 ]. This sort of heat tolerance may facilitate the contamination of heat-disinfected foods.…”

Section: Discussionmentioning

confidence: 99%

The Protean Acremonium. A. sclerotigenum/egyptiacum: Revision, Food Contaminant, and Human Disease

et al. 2018

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“…Only Thelonectria rubi is a plant pathogen [81]. Penicillium and Acremonium were the only taxa reported as a pathogen for cut roses [63,83,84]. Acrostalagmus and Sarocladium were reported as plant pathogens in roses [85,86].…”

Section: Grafting Changes the Rhizosphere Microbiome Of Rose Sp 'Nata...mentioning

confidence: 99%

Influence of Grafting on Rootstock Rhizosphere Microbiome Assembly in Rosa sp. ‘Natal Brier’

Ramirez-Villacis

Erazo-Garcia

Quijia-Pillajo

et al. 2023

Biology

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The root microbiome is vital in plant development and health and is highly influenced by crop cultural practices. Rose (Rosa sp.) is the most popular cut flower worldwide. Grafting in rose production is a standard practice to increase yield, improve flower quality, or reduce root-associated pests and diseases. ‘Natal Brier’ is a standard rootstock used in most commercial operations in Ecuador and Colombia, leading countries in producing and exporting ornamentals. It is known that the rose scion genotype affects root biomass and the root exudate profile of grafted plants. However, little is known about the influence of the rose scion genotype on the rhizosphere microbiome. We examined the influence of grafting and scion genotype on the rhizosphere microbiome of the rootstock ‘Natal Brier’. The microbiomes of the non-grafted rootstock and the rootstock grafted with two red rose cultivars were assessed using 16S rRNA and ITS sequencing. Grafting changed microbial community structure and function. Further, analysis of grafted plant samples revealed that the scion genotype highly influences the rootstock microbiome. Under the presented experimental conditions, the rootstock ‘Natal Brier’ core microbiome consisted of 16 bacterial and 40 fungal taxa. Our results highlight that the scion genotype influences root microbe’s recruitment, which might also influence the functionality of assembled microbiomes.

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“…2004 , Zuccaro et al . 2004 , Domsch et al 2007 , Perdomo et al 2011 , Mirtalebi et al 2017 , Summerbell et al . 2018 , de Hoog et al 2020 , Pérez-Cantero & Guarro 2020 , Kim et al 2021 ).…”

Section: Introductionmentioning

confidence: 99%

“…are cosmopolitan and distributed throughout a broad range of environments. They are mainly soilborne saprobes or weak to virulent, facultative or obligate pathogens of plants, other fungi, animals or humans (Gams 1971, 1975, Alfaro-García et al 1996, Novicki et al 2003, Lin et al 2004, Domsch et al 2007, Perdomo et al 2011, Mirtalebi et al 2017, Summerbell et al 2018, de Hoog et al 2020, Pérez-Cantero & Guarro 2020, Kim et al 2021. They are regarded of great importance in agro-forestry, food storage and preservation, industry, clinical mycology and pharmaceutical industries.…”

Section: Introductionmentioning

confidence: 99%

Redisposition of acremonium-like fungi in Hypocreales

Hou

Giraldo

Groenewald

et al. 2023

Studies in Mycology

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Acremonium is acknowledged as a highly ubiquitous genus including saprobic, parasitic, or endophytic fungi that inhabit a variety of environments. Species of this genus are extensively exploited in industrial, commercial, pharmaceutical, and biocontrol applications, and proved to be a rich source of novel and bioactive secondary metabolites. Acremonium has been recognised as a taxonomically difficult group of ascomycetes, due to the reduced and high plasticity of morphological characters, wide ecological distribution and substrate range. Recent advances in molecular phylogenies, revealed that Acremonium is highly polyphyletic and members of Acremonium s. lat. belong to at least three distinct orders of Sordariomycetes, of which numerous orders, families and genera with acremonium-like morphs remain undefined. To infer the phylogenetic relationships and establish a natural classification for acremonium-like taxa, systematic analyses were conducted based on a large number of cultures with a global distribution and varied substrates. A total of 633 cultures with acremonium-like morphology, including 261 ex-type cultures from 89 countries and a variety of substrates including soil, plants, fungi, humans, insects, air, and water were examined. An overview phylogenetic tree based on three loci (ITS, LSU, rpb2) was generated to delimit the orders and families. Separate trees based on a combined analysis of four loci (ITS, LSU, rpb2, tef-1α) were used to delimit species at generic and family levels. Combined with the morphological features, host associations and ecological analyses, acremonium-like species evaluated in the present study are currently assigned to 63 genera, and 14 families in Cephalothecales, Glomerellales and Hypocreales, mainly in the families Bionectriaceae, Plectosphaerellaceae and Sarocladiaceae and five new hypocrealean families, namely Chrysonectriaceae, Neoacremoniaceae, Nothoacremoniaceae, Pseudoniessliaceae and Valsonectriaceae. Among them, 17 new genera and 63 new combinations are proposed, with descriptions of 65 new species. Furthermore, one epitype and one neotype are designated to stabilise the taxonomy and use of older names. Results of this study demonstrated that most species of Acremonium s. lat. grouped in genera of Bionectriaceae, including the type A. alternatum. A phylogenetic backbone tree is provided for Bionectriaceae, in which 183 species are recognised and 39 well-supported genera are resolved, including 10 new genera. Additionally, rpb2 and tef-1α are proposed as potential DNA barcodes for the identification of taxa in Bionectriaceae.

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Short communication: Dieback of rose caused by Acremonium sclerotigenum as a new causal agent of rose dieback in Iran

Cited by 5 publications

References 20 publications

The Protean Acremonium. A. sclerotigenum/egyptiacum: Revision, Food Contaminant, and Human Disease

The Protean Acremonium. A. sclerotigenum/egyptiacum: Revision, Food Contaminant, and Human Disease

Influence of Grafting on Rootstock Rhizosphere Microbiome Assembly in Rosa sp. ‘Natal Brier’

Redisposition of acremonium-like fungi in Hypocreales

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