Relative tolerances of wild and cultivated barley to infection by Blumeria graminis f.sp. hordei (Syn. Erysiphe graminis f.sp. hordei). II—the effects of infection on photosynthesis and respiration |
| |
Authors: | Abdellah Akhkha Donald D Clarke Peter J Dominy |
| |
Institution: | a Botany Research Laboratory, Division of Biochemistry and Molecular Biology, Institute of Biomedical and Life Sciences, University of Glasgow, Glasgow G12 8QQ, Scotland, UK;b Graham Kerr Building, Division of Environmental and Evolutionary Biology, Institute of Biomedical and Life Sciences, University of Glasgow, Glasgow G12 8QQ, Scotland, UK |
| |
Abstract: | The relative levels of tolerance of two wild barley lines (Hordeum spontaneum), B19909 and I-17-40, and one cultivated barley (Hordeum vulgare), cv. Prisma, to Blumeria graminis f.sp. hordei were determined by comparing the effects of different levels of infection on the photosynthesis and respiration rates of the third leaf. Infection caused the early onset of senescence in all three lines, and in particular in cv. Prisma, and was accompanied by decreases in gross and net photosynthesis rates, increases in respiration rates, and loss of chlorophyll. The onset of senescence occurred at approximately the same time in infected leaves of the two wild lines, but once triggered, photosynthesis rates and chlorophyll levels declined more rapidly in I-17-40 than in B19909. A burst of respiratory activity accompanied the onset of senescence, and this was greatest in cv. Prisma. Conidial production was higher in B19909, indicating a higher level of tolerance in this line. |
| |
Keywords: | Powdery mildew Erysiphe Blumeria Wild barley Cultivated barley Hordeum vulgare Hordeum spontaneum Tolerance Photosynthesis Respiration Quantum efficiency Oxygen electrodes |
本文献已被 ScienceDirect 等数据库收录! |
|