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Citation for Study 12423

Citation title: "Characterization of Alternaria isolates from the infectoria species-group and a new taxon from Arrhenatherum, Pseudoalternaria arrhenatheria sp. nov.".

Study name: "Characterization of Alternaria isolates from the infectoria species-group and a new taxon from Arrhenatherum, Pseudoalternaria arrhenatheria sp. nov.".

This study is part of submission 12423 (Status: Published).

Citation

Lawrence D.P., Gannibal P.B., Dugan F., & Pryor B. 2013. Characterization of Alternaria isolates from the infectoria species-group and a new taxon from Arrhenatherum, Pseudoalternaria arrhenatheria sp. nov. Mycological Progress, .

Authors

• Lawrence D.P. (submitter) 530-6752-6745
• Gannibal P.B.
• Dugan F.
• Pryor B.

Abstract

The infectoria species-group within the genus Alternaria was originally conceived by Simmons in 1993 and was based upon common morphological characteristics that included the development of conidial chains with primary, secondary, and tertiary branching resulting in substantial three-dimensional complexity. These characters can overlap to varying degrees with numerous taxa in another Alternaria group, the alternata species-group, making species-group differentiation difficult. However, members of the infectoria species-group are also distinguished from other small-spored Alternaria species based upon colony characteristics that typically include white or nearly white floccose colonies on DRYES medium and clumps of sporulation islands on low sugarmedia such as V8 agar, PCA, and weak PDA. In addition, the infectoria species-group contains representatives that are known to produce teleomorphs (Lewia), whereas the members of the alternata species-group and other Alternaria speciesgroups are strictly asexual. In this study, an assemblage of isolates recovered from varied hosts from the west coast of the United States were examined based upon morphological characters and compared to previously described members of the infectoria species-group. These isolates and members of the infectoria species-group typically produce arachnoid vegetative hyphae with multiple primary conidiophores, whereas other small-spored Alternaria species produce primary conidiophores predominately directly from the agar surface. Additionally, molecular phylogenetic analyses resolved these isolates and members of the infectoria speciesgroup as distinctly nested amongst other sexual taxa in Allewia (Embellisia anamorph) and Macrospora (Nimbya anamorph) and phylogenetically distant to asexual lineages of Alternaria. One taxon among these isolates was novel and clustered with the asexual A. rosae in a distinct clade basal to all other members of the infectoria species-group. A new genus is proposed, Pseudoalternaria gen. nov. and a new taxon is described, Pseudoalternaria arrhenatheria sp. nov.. Moreover, a second taxon is reclassified, Pseudoalternaria rosae comb. nov.

Keywords

Alternaria, systematics

External links

• DOI: 10.1007/s11557-013-0910-x

About this resource

• Canonical resource URI: http://purl.org/phylo/treebase/phylows/study/TB2:S12423
• Other versions: Nexus NeXML
• Show BibTeX reference

  		@ARTICLE{TreeBASE2Ref20478,
  	 author = {Daniel Paul Lawrence and Philipp B Gannibal and Frank  Dugan and Barry M.  Pryor},
  	 title = {Characterization of Alternaria isolates from the infectoria species-group and a new taxon from Arrhenatherum, Pseudoalternaria arrhenatheria sp. nov.},
  	 year = {2013},
  	 keywords = {Alternaria, systematics},
  	 doi = {10.1007/s11557-013-0910-x},
  	 url = {http://},
  	 pmid = {},
  	 journal = {Mycological Progress},
  	 volume = {},
  	 number = {},
  	 pages = {},
  	 abstract = {The infectoria species-group within the genus
  Alternaria was originally conceived by Simmons in 1993
  and was based upon common morphological characteristics
  that included the development of conidial chains with primary,
  secondary, and tertiary branching resulting in substantial
  three-dimensional complexity. These characters can overlap
  to varying degrees with numerous taxa in another Alternaria
  group, the alternata species-group, making species-group differentiation
  difficult. However, members of the infectoria
  species-group are also distinguished from other small-spored
  Alternaria species based upon colony characteristics that typically
  include white or nearly white floccose colonies on
  DRYES medium and clumps of sporulation islands on low
  sugarmedia such as V8 agar, PCA, and weak PDA. In addition,
  the infectoria species-group contains representatives that are
  known to produce teleomorphs (Lewia), whereas the members
  of the alternata species-group and other Alternaria speciesgroups
  are strictly asexual. In this study, an assemblage of
  isolates recovered from varied hosts from the west coast of
  the United States were examined based upon morphological
  characters and compared to previously described members of
  the infectoria species-group. These isolates and members of
  the infectoria species-group typically produce arachnoid
  vegetative hyphae with multiple primary conidiophores,
  whereas other small-spored Alternaria species produce primary
  conidiophores predominately directly from the agar
  surface. Additionally, molecular phylogenetic analyses resolved
  these isolates and members of the infectoria speciesgroup
  as distinctly nested amongst other sexual taxa in
  Allewia (Embellisia anamorph) and Macrospora (Nimbya
  anamorph) and phylogenetically distant to asexual lineages
  of Alternaria. One taxon among these isolates was novel and
  clustered with the asexual A. rosae in a distinct clade basal to
  all other members of the infectoria species-group. A new
  genus is proposed, Pseudoalternaria gen. nov. and a new
  taxon is described, Pseudoalternaria arrhenatheria sp. nov..
  Moreover, a second taxon is reclassified, Pseudoalternaria
  rosae comb. nov.}
  }
  		

• Show RIS reference

  		TY  - JOUR
  ID  - 20478
  AU  - Lawrence,Daniel Paul
  AU  - Gannibal,Philipp B
  AU  - Dugan,Frank 
  AU  - Pryor,Barry M. 
  T1  - Characterization of Alternaria isolates from the infectoria species-group and a new taxon from Arrhenatherum, Pseudoalternaria arrhenatheria sp. nov.
  PY  - 2013
  KW  - Alternaria
  KW  - systematics
  UR  - http://dx.doi.org/10.1007/s11557-013-0910-x
  N2  - The infectoria species-group within the genus
  Alternaria was originally conceived by Simmons in 1993
  and was based upon common morphological characteristics
  that included the development of conidial chains with primary,
  secondary, and tertiary branching resulting in substantial
  three-dimensional complexity. These characters can overlap
  to varying degrees with numerous taxa in another Alternaria
  group, the alternata species-group, making species-group differentiation
  difficult. However, members of the infectoria
  species-group are also distinguished from other small-spored
  Alternaria species based upon colony characteristics that typically
  include white or nearly white floccose colonies on
  DRYES medium and clumps of sporulation islands on low
  sugarmedia such as V8 agar, PCA, and weak PDA. In addition,
  the infectoria species-group contains representatives that are
  known to produce teleomorphs (Lewia), whereas the members
  of the alternata species-group and other Alternaria speciesgroups
  are strictly asexual. In this study, an assemblage of
  isolates recovered from varied hosts from the west coast of
  the United States were examined based upon morphological
  characters and compared to previously described members of
  the infectoria species-group. These isolates and members of
  the infectoria species-group typically produce arachnoid
  vegetative hyphae with multiple primary conidiophores,
  whereas other small-spored Alternaria species produce primary
  conidiophores predominately directly from the agar
  surface. Additionally, molecular phylogenetic analyses resolved
  these isolates and members of the infectoria speciesgroup
  as distinctly nested amongst other sexual taxa in
  Allewia (Embellisia anamorph) and Macrospora (Nimbya
  anamorph) and phylogenetically distant to asexual lineages
  of Alternaria. One taxon among these isolates was novel and
  clustered with the asexual A. rosae in a distinct clade basal to
  all other members of the infectoria species-group. A new
  genus is proposed, Pseudoalternaria gen. nov. and a new
  taxon is described, Pseudoalternaria arrhenatheria sp. nov..
  Moreover, a second taxon is reclassified, Pseudoalternaria
  rosae comb. nov.
  L3  - 10.1007/s11557-013-0910-x
  JF  - Mycological Progress
  VL  - 
  IS  - 
  ER  -