title: Identification of the down-regulated genes in a mat1-2-deleted strain of Gibberella zeae, using cDNA subtraction and microarray analysis.
abstract: Gibberella zeae (anamorph: Fusarium graminearum), a self-fertile ascomycete, is an important pathogen of cereal crops. Here, we have focused on the genes specifically controlled by the mating type (MAT) locus, a master regulator of sexual developmental process in G. zeae. To identify these genes, we employed suppression subtractive hybridization between a G. zeae wild-type strain Z03643 and the isogenic self-sterile mat1-2 strain T43deltaM2-2. Both reverse Northern and cDNA microarray analyses using 291 subtractive unigenes confirmed that 58.8% (171 genes) were significantly down-regulated in T43deltaM2-2. Among these, 98 could be either manually or automatically annotated based on known functions of their possible homologs. Northern blot analysis revealed that all of the genes examined were differentially regulated by MAT1-2 during sexual development. This study is the first report on the set of genes that are transcriptionally altered by the deletion of MAT1-2 during sexual reproduction in G. zeae.
authors.affiliation: School of Agricultural Biotechnology and Center for Agricultural Biomaterials, Seoul National University, Seoul 151-921, Republic of Korea.
authors.forename: Seung-Ho
authors.initials: SH
authors.lastname: Lee
authors.forename: Sanghyeob
authors.initials: S
authors.lastname: Lee
authors.forename: Doil
authors.initials: D
authors.lastname: Choi
authors.forename: Yin-Won
authors.initials: YW
authors.lastname: Lee
authors.forename: Sung-Hwan
authors.initials: SH
authors.lastname: Yun
mesh_terms: D015152:Blotting, Northern; D018076:DNA, Complementary / Q000235:genetics; D004271:DNA, Fungal / Q000235:genetics; D017353:Gene Deletion; D015966:Gene Expression Regulation, Fungal; D005800:Genes, Fungal; D049770:Genes, Mating Type, Fungal; D005874:Gibberella / Q000235:genetics* / Q000502:physiology; D009693:Nucleic Acid Hybridization; D020411:Oligonucleotide Array Sequence Analysis; D012333:RNA, Messenger / Q000032:analysis
chemical_list: D018076:DNA, Complementary; D004271:DNA, Fungal; D012333:RNA, Messenger