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On the influence of abiotic stress conditions on growth of barley and bean and their predisposition for pathogens

On the influence of abiotic stress conditions on growth of barley and bean and their predisposition for pathogens

Zeitschrift fuer Pflanzenkrankheiten und Pflanzenschutz 93(6): 561-573

Shorttime changes of environmental conditions stressed barley and bean and affected plant growth and their predisposition for various pathogens. Moderate stress intensities (low or high temperatures, water or light deficits) increased the susceptibility to Erysiphe graminis var. hordei or Uromyces phaseoli and reduced disease level of spot blotch caused by Cochliobolus sativus, respectively. There was only little effect on plant growth in that case. Intensive stress as a result of combinations of unfavorable environmental conditions or longtime continuance of moderate stress reduced the plant growth and turned the predisposing effect to the opposite: after the treatment, plants were more resistant to diseases caused by biotrophic fungi, whereas there was increased susceptibility to the perthotrophic fungus. High intensities of fertilization acted as an additional stress and intensified the plant reaction to environmental alterations. The variation of the predisposition is discussed in relation to stress intensity.

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Accession: 006027873

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Influence of abiotic stress conditions on growth of barley and bean and their predisposition for pathogens. Zeitschrift fur Pflanzenkrankheiten und Pflanzenschutz = Journal of plant diseases and protection 93(6): 561-573, 1986

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