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Physiology and Biochemistry

Changed Metabolic Pathways and the Germination of Alternaria solani Spores. Paul E. Waggoner, The Connecticut Agricultural Experiment Station, New Haven, CT 06504; J. -Y. Parlange, The Connecticut Agricultural Experiment Station, New Haven, CT 06504. Phytopathology 67:1007-1011. Accepted for publication 28 February 1977. Copyright © 1977 The American Phytopathological Society, 3340 Pilot Knob Road, St. Paul, MN 55121. All rights reserved.. DOI: 10.1094/Phyto-67-1007.

Antimycin A slows the germination of Alternaria solani spores, and further slowing is caused by a concentration of salicyl hydroxamic acid (SHAM) that is ineffective alone. Germination is slowed more when antimycin and SHAM are applied some time after wetting of the spores than when they are applied at the time of wetting. A brief exposure of the spores to the chemicals at the time of wetting did not slow germination, a brief exposure later caused significant slowing, and additional exposures did not cause additional slowing.