title: Cloning, sequence and characterization of a sunflower (Helianthus annuus L.) pathogen-induced gene showing sequence homology with auxin-induced genes from plants.
abstract: The establishment of a plant-pathogen interaction involves changes in gene expressions in both organisms. To isolate Helianthus annuus genes whose expression is induced during processes of resistance to Plasmopara halstedii, a comparison of the expression pattern of healthy sunflowers was made with sunflowers infected with 2 races of P. halstedii, either virulent or avirulent, using differential display of mRNA. A full-length cDNA, HaAC1, representing a sunflower gene whose expression is enhanced during early stages of the incompatible interaction, was isolated. Different timing of RNA accumulation is observed between compatible and incompatible combinations. Sequence analysis and database search revealed significant homology with auxin-induced genes from plants. The expression of this gene, is also induced after treatment with 2,4-dichlorophenoxyacetic acid (2,4-D), salicylic acid (SA) and wounding.
authors.affiliation: GREAT, UA Université-INRA Organisation et Variabilité des Génomes Végétaux, Université Blaise Pascal, Aubière, France.
authors.forename: F
authors.initials: F
authors.lastname: Mazeyrat
authors.forename: S
authors.initials: S
authors.lastname: Mouzeyar
authors.forename: P
authors.initials: P
authors.lastname: Nicolas
authors.forename: D
authors.initials: D
authors.lastname: Tourvieille de Labrouhe
authors.forename: G
authors.initials: G
authors.lastname: Ledoigt
mesh_terms: D015084:2,4-Dichlorophenoxyacetic Acid / Q000494:pharmacology; D000595:Amino Acid Sequence; D003001:Cloning, Molecular; D018076:DNA, Complementary / Q000737:chemistry / Q000235:genetics / Q000302:isolation & purification; D018744:DNA, Plant / Q000032:analysis / Q000235:genetics; D005658:Fungi / Q000502:physiology; D018507:Gene Expression Regulation, Developmental; D018506:Gene Expression Regulation, Plant; D017343:Genes, Plant / Q000235:genetics*; D006368:Helianthus / Q000187:drug effects / Q000235:genetics* / Q000382:microbiology; D006540:Herbicides / Q000494:pharmacology; D007210:Indoleacetic Acids / Q000494:pharmacology*; D008969:Molecular Sequence Data; D012333:RNA, Messenger / Q000187:drug effects / Q000235:genetics / Q000378:metabolism; D017422:Sequence Analysis, DNA; D017386:Sequence Homology, Amino Acid
chemical_list: D018076:DNA, Complementary; D018744:DNA, Plant; D006540:Herbicides; D007210:Indoleacetic Acids; D012333:RNA, Messenger; D015084:2,4-Dichlorophenoxyacetic Acid