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The effect of humidity on the expression of partial resistance to powdery mildew in barley

Authors: NEWTON, A.C.

Journal: Plant Pathology

Volume: 42

Issue: 3

Pages: 364-367

eISSN: 1365-3059

ISSN: 0032-0862

DOI: 10.1111/j.1365-3059.1993.tb01513.x

Abstract:

Seedling leaves of four cultivars of barley, three of which express partial resistance, were inoculated with powdery mildew (Erysiphe graminis f.sp. hordei) and enclosed in an apparatus which enabled accurate control of humidity, air speed and temperature. Infection frequency was always greater at high humidity (>95%) than at low humidity (40–50%). Cultivar 7204 (Ethiopian) showed a greater reduction in infection frequency at both 12 and 16°C, and more reduction in biomass per colony at 16°C under low humidity than the other cultivars. The potential for exploiting such differences in barley breeding is discussed. Copyright © 1993, Wiley Blackwell. All rights reserved

Source: Scopus