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      The mating-type locus b of the sugarcane smut Sporisorium scitamineum is essential for mating, filamentous growth and pathogenicity.

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          Abstract

          Sporisorium scitamineum is the causal agent of sugarcane smut, which is one of the most serious constraints to global sugarcane production. S. scitamineum and Ustilago maydis are two closely related smut fungi, that are predicted to harbor similar sexual mating processes/system. To elucidate the molecular basis of sexual mating in S. scitamineum, we identified and deleted the ortholog of mating-specific U. maydis locus b, in S. scitamineum. The resultant b-deletion mutant was defective in mating and pathogenicity in S. scitamineum. Furthermore, a functional b locus heterodimer could trigger filamentous growth without mating in S. scitamineum, and functionally replace the b locus in U. maydis in terms of triggering aerial filament production and forming solopathogenic strains, which do not require sexual mating prior to pathogenicity on the host plants.

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          Author and article information

          Journal
          Fungal Genet. Biol.
          Fungal genetics and biology : FG & B
          Elsevier BV
          1096-0937
          1087-1845
          Jan 2016
          : 86
          Affiliations
          [1 ] Guangdong Province Key Laboratory of Microbial Signals and Disease Control, College of Agriculture, South China Agricultural University, Guangzhou, People's Republic of China; Biotechnology Research Institute, Guangxi Academy of Agricultural Sciences, Guangxi, People's Republic of China.
          [2 ] Guangxi Key Laboratory of Biology for Crop Diseases and Insect Pests, Plant Protection Research Institute, Guangxi Academy of Agricultural Sciences, Guangxi, People's Republic of China.
          [3 ] Guangdong Province Key Laboratory of Microbial Signals and Disease Control, College of Agriculture, South China Agricultural University, Guangzhou, People's Republic of China.
          [4 ] Biotechnology Research Institute, Guangxi Academy of Agricultural Sciences, Guangxi, People's Republic of China.
          [5 ] Guangdong Province Key Laboratory of Microbial Signals and Disease Control, College of Agriculture, South China Agricultural University, Guangzhou, People's Republic of China. Electronic address: zdjiang@scau.edu.cn.
          [6 ] Guangdong Province Key Laboratory of Microbial Signals and Disease Control, College of Agriculture, South China Agricultural University, Guangzhou, People's Republic of China. Electronic address: dengyz@scau.edu.cn.
          Article
          S1087-1845(15)30046-3
          10.1016/j.fgb.2015.11.005
          26563415
          4def73d8-4f8a-43c9-b537-e99f480a65aa
          History

          Fungal pathogenicity,Mating,Solopathogenic haploid,Sugarcane smut,bE/bW heterodimeric transcriptional factor

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