Einfluß von Phosphat auf die Bildung von Tentoxin durch Alternaria alternata (Fr.) Keissler

✍ Scribed by Dr. B. Brückner; I. Hänel; F. Hänel; R. Tröger

• Publisher: John Wiley and Sons
• Year: 2007
• Tongue: English
• Weight: 447 KB
• Volume: 23
• Category: Article
• ISSN: 0233-111X
• DOI: 10.1002/jobm.19830230905

✦ Synopsis

AEternaria alternata (FR.) KEISSLER produces a phytotoxic substance tentoxin. The influence of inorganic phosphate on the formation of this secondary metabolite was analyzed. Distinct phases of growth and metabolite formation can be defined. The first phase shows exponential growth, high Qo,, protein and nucleic acid values and a rapid uptake of inorganic phosphate from the medium. The second phase shows linear growth and active tentoxin formation takes place. The highest yields of tentoxin are obtained, when inorganic phosphate in the medium was limited. The phosphate level also influences the ATP-pool of the mycelium. The role of ATP as an effector in phosphate mediated control of tentoxin synthesis was discussed.

Alternaria alternata (FR.) KEISSLER (Alternaria tenuzs auct.) bildet die phytotoxische

Substanz Tentoxin, die bei verschiedenen dikotylen Pflanzen starke Chlorosen an den Keimbllittern hervorruft. In den letzten Jahren konnten die Struktur, der Wirkungsmechanismus sowie chemische und physikalische Eigenschaften dieses Tetrapeptids aufgeklart werden (FULTON et al. 1965, HALLOIN et al. 1970). uber die Regulations-