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Eukaryotic ribosomes are essential for proliferation, differentiation, and cell growth. RPs26 is a ribosomal subunit structural protein involved in the growth and development process. Little is known about the function of  PsRPs26  in pathogenic fungi. In this study, we isolated the RPs26 gene,  PsRPs26 , from  Puccinia striiformis  f. sp.  tritici  ( Pst ).  PsRPs26  contains a eukaryotic-specific Y62–K70 motif and is more than 90% identical with its ortholog gene in other fungi. PsRPs26 was found to be localized in both the nucleus and cytoplasm. Expression of  PsRPs26  increased when wheat seedlings were inoculated with the  Pst  CYR31 isolate. Moreover, knockdown of  PsRPs26  by a host-induced gene silencing system inhibited growth and limited urediospore production in  Pst . Our discovery that  PsRPs26  may contribute to the pathogenicity of  Pst  and open a new way in the pathogenic function of  PsRPs26  in cereal rust fungi.

PsRPs26, a 40S Ribosomal Protein Subunit, Regulates the Growth and Pathogenicity of Puccinia striiformis f. sp. Tritici