Differential effects of spot blotch on photosynthesis and grain yield in two barley cultivars

Barley spot blotch (SB), caused by Cochliobolus sativus, is an important barley disease which causes extensive grain yield losses. These losses may not always correlate directly with the amount of diseased leaf area. Two barley cultivars, Quebracho (susceptible to SB) and Carumbé (with intermediate...

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Bibliographic Details
Published in:European journal of plant pathology 2014-07, Vol.139 (3), p.471-480
Main Authors: Hoffman, Esteban, Viega, Luis, Glison, Nicolás, Castro, Ariel, Pereyra, Sylvia, Pérez, Carlos
Format: Article
Language:English
Subjects:
Agriculture
Barley
Biomedical and Life Sciences
Bipolaris sorokiniana
Cochliobolus sativus
Crop yield
Cultivars
Ecology
field experimentation
Field tests
filling period
Fungicides
grain yield
greenhouses
Growing season
Hordeum vulgare
inoculum
leaf area
Leaves
Life Sciences
Photosynthesis
physiological response
Plant diseases
Plant growth
Plant Pathology
Plant Sciences
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Summary:Barley spot blotch (SB), caused by Cochliobolus sativus, is an important barley disease which causes extensive grain yield losses. These losses may not always correlate directly with the amount of diseased leaf area. Two barley cultivars, Quebracho (susceptible to SB) and Carumbé (with intermediate susceptibility to SB), were compared in field experiments in 2003, 2004 and 2006. Plots of each cultivar were either inoculated with C. sativus or protected with fungicide under field conditions to generate contrasting treatments: i) diseased, and ii) free of disease, respectively. SB severity over the growing season, photosynthetic rate on leaves with no visible symptoms and grain yield were assessed for each treatment and year. There was no treatment effect on cv. Carumbé, while cv. Quebracho showed a significant yield reduction, even though SB severity during the grain filling period was
ISSN:0929-1873
1573-8469
DOI:10.1007/s10658-014-0404-y