Journal article

Publication year: 2004

Pages: 304-312

Journal: Molecular Plant-Microbe Interactions

Volume number: 17

Issue number: 3

ISSN: 0894-0282

DOI Link: https://doi.org/10.1094/MPMI.2004.17.3.304

Publisher: American Phytopathological Society

Abstract: 
Nonhost resistance of cereals to inappropriate formae speciales of Blumeria graminis is little understood. However, on the microscopic level, nonhost defense to B. graminis is reminiscent of host defense preventing fungal development by penetration resistance and the hypersensitive cell death response (HR). We analyzed histochernically the accumulation of superoxide anion radicals (O-2(-)) and hydrogen peroxide (H2O2) at sites of B. graminis attack in nonhost barley and wheat. Superoxide visualized by subcellular reduction of nitroblue tetrazolium accumulated in association with successful fungal penetration in attacked cells and in cells neighboring HR. In contrast, H2O2 accumulated in cell wall appositions beneath fungal penetration attempts or in the entire epidermal cell during HR. The data provide evidence for different roles and sources of superoxide and H2O2 in the nonhost interaction of cereals with inappropriate formae speciales of B. graminis.

Harvard Citation style: Trujillo, M., Kogel, K. and Hückelhoven, R. (2004) Superoxide and hydrogen peroxide play different roles in the nonhost interaction of barley and wheat with inappropriate formae speciales of Blumeria graminis, Molecular Plant-Microbe Interactions, 17(3), pp. 304-312. https://doi.org/10.1094/MPMI.2004.17.3.304

APA Citation style: Trujillo, M., Kogel, K., & Hückelhoven, R. (2004). Superoxide and hydrogen peroxide play different roles in the nonhost interaction of barley and wheat with inappropriate formae speciales of Blumeria graminis. Molecular Plant-Microbe Interactions. 17(3), 304-312. https://doi.org/10.1094/MPMI.2004.17.3.304