Journal article

Publication year: 2022

Pages: 82-90

Journal: Journal of Phytopathology

Volume number: 170

Issue number: 2

ISSN: 0931-1785

eISSN: 1439-0434

DOI Link: https://doi.org/10.1111/jph.13057

Publisher: Wiley

Abstract: 
Non-host resistance is the resistance of plants against all so-called non-adapted pathogens, and is considered the most durable and efficient immune system of plants. We investigated barley powdery mildew (Blumeria graminis f.sp. hordei, Bgh)-triggered defence responses in seven wheat genotypes, and the induction of resistance by this non-host pathogen to challenge infection with leaf rust, Puccinia triticina Eriks (formerly known as Puccinia recondita f.sp. tritici). Bright-field and ultraviolet microscopy revealed that although the germination of conidia on non-host wheat leaves was generally lower than on host barley leaves, the 100% germination on Mv Mambo and only 50% germination on Mv 1 wheat genotypes are the two extremes. If we consider only the germinated conidia, papilla formation was the most frequently observed interaction on Mv 2 (90%) and Mv 4 (88%) genotypes. Epidermal cell death was pronounced on Mv Mambo (31%), but rare on Mv 2 (10%) and Mv 4 (11%), and a mesophyll hypersensitive response could even be detected. At sites of penetration attempts accumulation of H2O2 was shown by 3,3 '-diaminobenzidine staining. Ascorbate peroxidase, glutathione S-transferase and catalase enzyme activities were augmented by 24.5%, 40.4%, and 21.5%, respectively, in wheat leaves 2 days after Bgh infection. Primary inoculation with Bgh, although with high variability, reduced the number of pustules in all wheat genotypes at first and third leaf stages upon inoculation with leaf rust races 12 and 61 by 10%-70% depending on the genotype, leaf stage and rust race.

Harvard Citation style: Barna, B., Mate, G., Preuss, J., Harrach, B., Gullner, G., Manninger, K., et al. (2022) Defence responses triggered by Blumeria graminis f.sp. hordei in non-host wheat genotypes results in a decrease in Puccinia triticina infection, Journal of Phytopathology, 170(2), pp. 82-90. https://doi.org/10.1111/jph.13057

APA Citation style: Barna, B., Mate, G., Preuss, J., Harrach, B., Gullner, G., Manninger, K., & Fodor, J. (2022). Defence responses triggered by Blumeria graminis f.sp. hordei in non-host wheat genotypes results in a decrease in Puccinia triticina infection. Journal of Phytopathology. 170(2), 82-90. https://doi.org/10.1111/jph.13057