Phylogeny of the Glomerales and Diversisporales (Fungi: Glomeromycota) from actin and elongation factor 1-alpha sequences

Helgason, Thorunn; Watson, Irene J.; Young, J. Peter W.

doi:10.1016/s0378-1097(03)00802-4

Cited by 74 publications

(54 citation statements)

References 22 publications

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“…Specific 2-aa deletions (Tanabe et al, 2002) are boxed. We confirmed that this deletion is also present in the recently published sequence of the Glomales (Helgason et al, 2003). In addition to sequences used in Tanabe et al (2002Tanabe et al ( , 2004, sequences of Ichthyophonus irregularis (GenBank acc.…”

Section: Did Microsporidia Evolve From Within the Fungi?supporting

confidence: 85%

“…From these results, Schüßler et al (2001) revised the higher-level taxonomy of the Glomales: the Glomales (sensu Morton and Benny, 1990) was elevated to the new phylum Glomeromycota, and the four orders, the Archaeosporales, Diversisporales, Glomerales, and Paraglomales were revised or newly erected within the Glomeromycota. However, subsequent analyses using EF-1a and actin have not supported a phylogenetic affinity of the Glomales with higher fungi (Helgason et al, 2003). Results of an a-tubulin analysis further complicated the picture by recovering a monophyletic grouping of the Glomales and Chytridiomycota (Corradi et al, 2004).…”

Section: Relationships Within Zygomycotamentioning

confidence: 97%

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Evolutionary relationships among basal fungi (Chytridiomycota and Zygomycota): Insights from molecular phylogenetics

Tanabe

Watanabe

Sugiyama³

2005

J. Gen. Appl. Microbiol.

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Evolutionary relationships of the two basal fungal phyla Chytridiomycota and Zygomycota are reviewed in light of recent molecular phylogenetic investigation based on rDNA (nSSU, nLSU rDNA), entire mitochondrial genomes, and nuclear protein coding gene sequences (e.g., EF-1a a, RPB1). Accumulated molecular evidence strongly suggests that the two basal fungal phyla are not monophyletic. For example, the chytridiomycete order Blastocladiales appears to be closely related to the zygomycete order Entomophthorales. Within the Zygomycota, a monophyletic clade, consisting of the Dimargaritales, Harpellales, and Kickxellales, which is characterized by a shared unique septal ultrastructure, was identified. Moreover, evidence for the exclusion of zygomycete orders Amoebidiales and Eccrinales from the Fungi, and their placement at the Animal-Fungi boundary has been clearly documented. Microsporidia, a group of amitochondriate organisms currently under intensive study, is not supported as derived within the Fungi, but a fungal affinity cannot be ruled out. Taking these molecular phylogenetic studies into account, we proposed a hypothetical evolutionary framework of basal fungi.Key Words-Chytridiomycota; Fungi; Microsporidia; molecular phylogeny; nSSU rDNA; RPB1; Zygomycota J. Gen. Appl. Microbiol., 51, 267-276 (2005) Invited Review * Present address, and address reprint requests to: Dr. Junta Sugiyama, TechnoSuruga Co., Ltd. (formerly NCIMB Japan), Tokyo Office, Ogawamachi Kita Bldg. 4F, 1-8-3 Kanda Ogawamachi, Chiyoda-ku, Tokyo 101-0052, Japan. E-mail: jsugiyam@tecsrg.co.jp basal fungal phyla as suggested by accumulating molecular phylogenetic studies, especially emphasizing supra-ordinal relationships. Non-monophyletic nature of ChytridiomycotaCurrently, the Chytridiomycota contains five orders: the Blastocladiales, Chytridiales, Neocallimastigales, Monoblepharidales, and Spizellomycetales (Hawksworth et al., 1995). This classification scheme is based primarily on zoospore ultrastructure (Barr, 1990). Results of molecular phylogenetic analyses of rDNA sequences suggest that the Spizellomycetales, Neocallimastigales, and Monoblepharidales are monophyletic (James et al., 2000;Li and Heath, 1992), supporting the validity of the proposed chytrid higher-level taxonomy. The Chytridiales, however, appears to be polyphyletic as are some chytrid genera (e.g., Rhizophydium; James et al., 2000). rDNA analyses, however, have not resolved the interordinal relationships of the Chytridiomycota, which might be due to the lack of phylogenetic signal within rDNA sequences (James et al., 2000). Although taxon sampling has been limited, analysis of complete mitochondrial genome sequences has provided a clearer framework of chytridiomycete phylogeny. This analysis suggests that the Monoblepharidales branched earlier than a well-supported Chytridiales-Spizellomycetales lineage (Bullerwell et al., 2003a). In the mtDNA analysis, the phylogenetic position of the Blastocladiales is not statistically re- Barr (1980) a This classification sche...

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Section: Did Microsporidia Evolve From Within the Fungi?supporting

confidence: 85%

Section: Relationships Within Zygomycotamentioning

confidence: 97%

Evolutionary relationships among basal fungi (Chytridiomycota and Zygomycota): Insights from molecular phylogenetics

Tanabe

Watanabe

Sugiyama³

2005

J. Gen. Appl. Microbiol.

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“…Taxonomy of AMF is presently changing dramatically, and as a consequence, several new phylogenetic units have been established (Helgason et al 2003;Schüβler et al 2001b;Schwarzott et al 2001). For this reason we determined the approximate phylogenetic position of the myco-heterotrophic plant mycobionts by comparison with phylogenetic treatments, representing the basis of the new AMF taxonomy (Schüβler et al 2001b;Schwarzott et al 2001).…”

Section: Discussionmentioning

confidence: 99%

Arbuscular mycorrhizal fungi of the Glomus-group A lineage (Glomerales; Glomeromycota) detected in myco-heterotrophic plants from tropical Africa

et al. 2006

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We amplified and sequenced partial 18S rDNA of fungi in the roots of 11 African myco-heterotrophic plants out of four angiosperm families (Burmanniaceae, Thismiaceae, Triuridaceae, and Gentianaceae). The sequences were cladistically analyzed with published sequences of arbuscular mycorrhizal fungi. We show that all investigated African myco-heterotrophic plants are associated with arbuscular mycorrhizal fungi within a clade of Glomus (Glomus-group A). We reveal a fine-level mycorrhizal specificity for a particular set of arbuscular mycorrhizal fungi within Glomus-group A by Afrothismia hydra (Thismiaceae). Furthermore, we show that the roots of two myco-heterotrophic plant individuals, besides being colonized by representatives of Glomus-group A, also contain DNA of Acaulospora sp. Consequently, Acaulospora is interpreted as a facultative mycorrhizal associate.

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“…Some of them include DNA/DNA hybridization, G+C content analysis or PCR based methods, including those that detect polymorphisms in the genome, like RAPDs and AFLPs, or in certain genomic regions or genes, like RFLPs (for ribosomal RNA) or direct sequencing of these and other genomic regions (ribosomal DNA, actin gene, transcription elongation factor, beta tubulin gene, Ras protein, chitin synthase, etc.) (Bruns et al, 1991;Mehmann et al, 1994;Thon and Royse, 1999;Helgason et al, 2003).…”

Section: Molecular Approaches To Study the Form Genusmentioning

confidence: 99%

Review. Biology and systematics of the form genus Rhizoctonia

García¹,

Onco

Susan

2006

Span. j. agric. res.

191

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Members of the form genus Rhizoctonia D.C. are considered as a complex mixture of filamentous fungi, having in common the possession of a non-spored imperfect state, usually referred to as the Rhizoctonia anamorph. The group includes several of the most devastating crop pathogens like Thanatephorus cucumeris (Frank) Donk (anamorph = Rhizoctonia solani Kühn), the majority of orchid mycorrhizal symbionts (mainly belonging to genus Ceratobasidium D.P. Rogers) and a collection of saprotrophic organisms of different systematic placement. The Rhizoctonia anamorph is characterized by several common features present among members of the entire Rhizoctonia species complex. Taxa from the group have been rearranged into several groups of higher fungi, including both Ascomycota and Basidiomycota, and split into several genera, employing criteria such as the analysis and ultrastructural comparison of septal apparatus. Until very recently, classification for some of the groups within the complex has been exclusively based on criteria such as hyphal anastomosis, since other types of diagnostic features are usually scarce in these fungi. Phytopathological studies in the complex have represented the major contingent of contributions in the group, especially in the case of R. solani. Some members of the complex have been reported to be protective isolates against pathogenic members of Rhizoctonia and some other fungal pathogens. This review focuses on the knowledge of several aspects of the species of Rhizcotonia s. lato, such as its current taxonomic placement, the biology and systematics of some groups of the complex, and a revision of the methodologies employed in studying it.Additional key words: Basidiomycetes, biocontrol, Ceratobasidiaceae, Ceratobasidium, fungal diseases, methodology, taxonomy, Thanatephorus. Resumen Biología y Sistemática del género forma RhizoctoniaLos miembros del género forma Rhizoctonia D.C. son considerados como un complejo de hongos filamentosos, presentando en común una fase asexual no productora de esporas, denominada anamorfo tipo Rhizoctonia. El grupo incluye algunos importantes patógenos como Thanatephorus cucumeris (Frank) Donk (anamorfo=Rhizoctonia solani Kühn), la mayoría de especies micorrícicas de orquídeas (principalmente del género Ceratobasidium D.P. Rogers), y algunos taxones de posición taxonómica variada. El anamorfo tipo Rhizoctonia es definido por una serie de características, presentes y comunes en todos los taxones del complejo. Los taxones del grupo han sido distribuidos entre varios grupos de hongos, incluyendo Ascomicetes y Basidiomicetes, y reubicados en varios géneros de ambas clases, empleando criterios de clasificación tales como el análisis y comparación de la ultraestructura del aparato septal. Habitualmente, la clasificación en algunos de los grupos del complejo ha estado basada en la aplicación de criterios tales como la anastomosis hifal, debido a que en este tipo de hongos es escasa la presencia de un número aceptable de caracteres diagnósticos. Los trabajos ...

show abstract

Phylogeny of the Glomerales and Diversisporales (Fungi: Glomeromycota) from actin and elongation factor 1-alpha sequences

Cited by 74 publications

References 22 publications

Evolutionary relationships among basal fungi (Chytridiomycota and Zygomycota): Insights from molecular phylogenetics

Evolutionary relationships among basal fungi (Chytridiomycota and Zygomycota): Insights from molecular phylogenetics

Arbuscular mycorrhizal fungi of the Glomus-group A lineage (Glomerales; Glomeromycota) detected in myco-heterotrophic plants from tropical Africa

Review. Biology and systematics of the form genus Rhizoctonia

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