Phylogenic analysis revealed an expanded C₂H₂-homeobox subfamily and expression profiles of C₂H₂ zinc finger gene family in Verticillium dahliae

Gene
Dianguang XiongChengming Tian

Abstract

C2H2 zinc finger (CZF) proteins are a major class of transcription factors that play crucial roles in fungal growth, development, various stress responses, and virulence. Little genome-wide data is available regarding the roles of CZF proteins in Verticillium dahliae, a destructive pathogen that causes vascular wilt disease in more than 200 plant species. We identified a total of 79 typical CZF genes in V. dahliae. Comparative analysis revealed that four plant pathogenic fungi, V. dahliae, Fusarium oxysporum, Magnaporthe oryzae, and Botrytis cinerea, have comparable numbers of predicted CZF genes with similar characteristics. Phylogenetic analysis identified a C2H2-homeobox subfamily in V. dahliae containing seven genes with similar gene structures. V. dahliae and F. oxysporum (Hypocreomycetidae) have more genes of this subfamily than M. oryzae (Sordariomycetidae) and B. cinerea (Leotiomycetes). Furthermore, gene-expression analysis of the smoke tree wilt fungus V. dahliae strain XS11 using digital gene-expression profiling and RT-qPCR revealed that a number of CZF genes were differentially expressed during microsclerotia formation, nutritional starvation, and simulated in planta conditions. Furthermore, the expression profiles...Continue Reading

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