Mating type idiomorphs of Pyrenophora teres in Turkey

Pyrenophora teres f. maculata (Ptm) and Pyrenophora teres f. teres (Ptt) causes spot form and net form of net blotch diseases of barley, respectively. Although both forms of P. teres are morphologically similar, their symptoms and genetic background differ. In this study, 175 single spore (109 Ptm and 66 Ptt) isolates obtained from different regions of Turkey were evaluated for their mating type distribution and prevalence. Fungal isolates of both forms were verified using species-speci.c polymerase chain reaction (PCR) primers. For mating type determination studies, duplex PCR was performed using MAT-specific single nucleotide polymorphism primers. Sixty and 49 of 109 Ptm isolates were found as MAT1-1 and MAT1-2 types, respectively and 43 and 23 of 66 Ptt isolates were found as MAT1-1 and MAT1-2 types, respectively. These results show the possibility of sexual reproduction among the Ptm isolates in Turkey and Ptt population of Central Anatolia, Turkey. However, the overall pattern of Ptt isolates did not support the sexual reproduction hypothesis in Turkey. Sexual reproduction in the life cycle of P. teres is important since it could lead to genetic and pathogenic variation. As a result of new sexual combinations more virulent pathotypes of P. teres may occur

Certification and the American Phytopathological Society

The profession of plant pathology strives to improve the health and safety of the public through improved plant health systems. This includes the benefits afforded by well-managed urban landscapes and abundant food and fiber. However, the proud glow of the profession of plant pathology has dimmed over the past 20 years to the point that some members of the American Phytopathological Society (APS), the principal professional society of plant pathologists in the United States, are not sure what a plant pathologist should know or what a plant pathologist is responsible for (Phytopathology News 30:162). Without a unified, positive direction for the profession of plant pathology, we will see continued dissolution of academic plant pathology departments to departments such as microbiology, ecology, and plant science. We lament that the public doesn’t understand who we are, and we seek ways to change that public perception. Plant pathology can be divided into two major components: (i) the science of plant pathology, and (ii) the profession of plant pathology. The basic research discoveries that lead to the development of the scientific principles of plant pathology provide the foundation for the profession. The profession of plant pathology is the application of those scientific principles in production agriculture, forestry, and urban settings to benefit the public by safely reducing the negative impact of plant diseases