Journal
MYCOLOGICAL PROGRESS
Volume 17, Issue 3, Pages 343-356Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s11557-017-1358-1
Keywords
Alternaria; Sooty head mold; Taxonomy; Alternaria kordkuyana sp nov.; Section Pseudoalternaria
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Funding
- Russian Science Foundation [14-26-00067]
- High Council for Research of the University of Tehran
- Russian Science Foundation [14-26-00067] Funding Source: Russian Science Foundation
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During the spring and summer of 2014 and 2015, wheat and barley fields in the Iranian provinces of Golestan and Alborz showed a high incidence of symptoms of black (sooty) head mold of wheat and barley. The isolation results revealed that Alternaria was associated with these symptoms. One hundred and forty isolates were collected and morphologically characterized based on the development of conidial chains with primary, secondary, and tertiary branching patterns, consistent with the three-dimensional sporulation complexity of members of Alternaria in sections Infectoriae and Pseudoalternaria. Subsequently, 16 Alternaria isolates exhibiting high morphological diversity were characterized based on extensive morphological and molecular comparisons. Phylogenetic analyses of three loci [ITS, glyceraldehyde 3-phosphate dehydrogenase (gpd), and plasma membrane ATPase (ATPase)] revealed that 15 isolates belonged to section Infectoriae but could not be assigned to phylogenetic species and one isolate represents a new species, Alternaria kordkuyana sp. nov., in section Pseudoalternaria. Morphological assessments revealed a high degree of variation among section Infectoriae isolates and that A. kordkuyana has significant morphological differences as compared to the three other species currently described in section Pseudoalternaria.
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