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A new species complex including Claviceps fusiformis and Claviceps hirtella

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Relation http://oar.icrisat.org/6142/
 
Title A new species complex including Claviceps fusiformis and Claviceps hirtella
 
Creator Pazoutová, S
Kolařík, M
Odvody, G N
Frederickson, D E
Olšovská, J
Man, P
 
Subject Millets
Genetics and Genomics
 
Description Isolates of Claviceps species with lunate to fusiform macroconidia were collected from panicoid grasses in Texas and
Zimbabwe and described as new species based on anamorphs since no teleomorphs were available. Characterization
was based upon morphology and partial sequences of rDNA and β-tubulin. The isolates grouped into two stronglysupported
clades. The first clade contained ancestral C. hirtella and C. fusiformis from pearl millet (Pennisetum
glaucum) in clade terminal position with Texas isolates from native cup grass (Eriochloa sericea) and pearl millet
grouped between them. The second clade consisted of African isolates from Urochloa and Eragrostis. The isolates from
Texas from pearl millet and buffel grass (Cenchrus ciliaris) and isolates from E. sericea were described as new species,
Sphacelia texensis and Sphacelia eriochloae, respectively. Both species had morphology, DNA markers, and alkaloid
production that was intermediate between those features exhibited in C. fusiformis and C. hirtella. The African isolates
from Urochloa and Eragrostis were also described as a new species, Sphacelia lovelessii. In shaken cultures, C. hirtella
readily produced a whole range of clavines with agroclavine and festuclavine predominating, but ergometrine was also
detected. Claviceps fusiformis produced mainly agroclavine and elymoclavine, S. eriochloae produced mainly
agroclavine, elymoclavin and festuclavine and the cultures of S. texensis contained small amounts of agroclavine and
festuclavine. Only traces of clavines were found in cultures of S. lovelessii of the second clade. The alkaloid content of
infected florets in the sphacelial (honeydew) developmental stage was also measured. Only C. fusiformis and S.
eriochloae produced alkaloids in planta at this early stage.
 
Publisher Springer Netherlands
 
Date 2008
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
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Identifier http://oar.icrisat.org/6142/1/fungalDiversity_95-111_2008.pdf
Pazoutová, S and Kolařík, M and Odvody, G N and Frederickson, D E and Olšovská, J and Man, P (2008) A new species complex including Claviceps fusiformis and Claviceps hirtella. Fungal Diversity. pp. 95-111.