Journal
FUNGAL GENETICS AND BIOLOGY
Volume 45, Issue -, Pages S15-S21Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.fgb.2008.04.005
Keywords
pheromone receptor; homeodomain; Sporisorium reilianum; Ustilago hordei; Malassezia globosa
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Smut fungi are basidiomycete plant pathogens that pose a threat to many important cereal crops. In order to be pathogenic on plants, smut fungal cells of compatible mating-type need to fuse. Fusion and pathogenicity are regulated by two loci, a and b, which harbor conserved genes. The functions of the encoded mating-type complexes have been well-studied in the model fungus Ustilago maydis and will be briefly reviewed here. Sequence comparison of the mating-type loci of different smut and related fungi has revealed that these loci differ substantially in structure. These structural differences point to an evolution from tetrapolar to bipolar mating behavior, which might have occurred several independent times during fungal speciation. (c) 2008 Elsevier Inc. All rights reserved.
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