VIEW ARTICLE

Physiology and Biochemistry

Effect of Temperature and Moisture on Tenuazonic Acid Production by Alternaria tenuissima. A. B. Young, Former graduate student, Department of Botany, Plant Pathology and Microbiology, Auburn University Agricultural Experiment Station, Auburn, AL 36830, Present address of senior author: 18718 S.E. 400th Street, Enumclaw, WA 98022; N. D. Davis(2), and U. L. Diener(3). (2)(3)Professors, Department of Botany, Plant Pathology and Microbiology, Auburn University Agricultural Experiment Station, Auburn, AL 36830. Phytopathology 70:607-609. Accepted for publication 21 November 1979. Copyright 1980 The American Phytopathological Society. DOI: 10.1094/Phyto-70-607.

The optimum temperature for tenuazonic acid (TZA) production by Alternaria tenuissima AUA 843 in 2% yeast extract–4% sucrose medium was 20 C. On cottonseed, maximum production of TZA also was obtained at 20 C. The limiting seed moisture content for mycelium growth and TZA production on cottonseed was approximately 14.9%, with highest production of mycelium and TZA occurring at 37.5% seed moisture content.