title: The yeast polyadenylate-binding protein (PAB1) gene acts as a disease lesion mimic gene when expressed in plants.
abstract: We have expressed the gene (PAB1) encoding the yeast polyadenylate-binding protein (Pab1p) in tobacco. Plants that accumulate the Pab1p display a range of abnormalities, ranging from a characteristic chlorosis in leaves to a necrosis and large inhibition of growth. The severity of these abnormalities reflects the levels of yeast Pab1p expression in the transgenic plants. In contrast, no obvious differences could be seen in callus cultures between the transgene and vector control. Plants that display PAB-associated abnormalities were resistant to a range of plant pathogens, and had elevated levels of expression of a pathogenesis-related gene. These two properties--impairment of growth and induction of defense responses--indicate that the yeast PAB1 gene can act as a disease lesion mimic gene in plants.
authors.affiliation: Tobacco and Health Research Institute, University of Kentucky, Lexington 40546-0091, USA.
authors.forename: Q
authors.initials: Q
authors.lastname: Li
authors.forename: C
authors.initials: C
authors.lastname: Von Lanken
authors.forename: J
authors.initials: J
authors.lastname: Yang
authors.forename: C B
authors.initials: CB
authors.lastname: Lawrence
authors.forename: A G
authors.initials: AG
authors.lastname: Hunt
mesh_terms: D002455:Cell Division / Q000235:genetics; D046508:Culture Techniques; D004274:DNA, Recombinant; D015870:Gene Expression; D009868:Oomycetes / Q000472:pathogenicity; D010935:Plant Diseases / Q000235:genetics* / Q000382:microbiology; D018515:Plant Leaves / Q000235:genetics / Q000382:microbiology; D030821:Plants, Genetically Modified / Q000235:genetics / Q000254:growth & development / Q000382:microbiology; D010947:Plants, Toxic; D039102:Poly(A)-Binding Proteins; D011549:Pseudomonas / Q000472:pathogenicity; D016601:RNA-Binding Proteins / Q000235:genetics*; D012441:Saccharomyces cerevisiae / Q000737:chemistry; D014026:Nicotiana / Q000235:genetics* / Q000254:growth & development / Q000382:microbiology; D014027:Tobacco Mosaic Virus / Q000472:pathogenicity; D014170:Transformation, Genetic; D019076:Transgenes / Q000235:genetics
chemical_list: D004274:DNA, Recombinant; D039102:Poly(A)-Binding Proteins; D016601:RNA-Binding Proteins