Weiteres zur Keimungsphysiologie von Puccinia graminis tritici (Pers.) Erickss. u. Henn.

Die Aktivität einiger Enzyme des Kohlenhydratstoffwechsels in Weizenkeimpflanzen nach Infektion mit Puccinia graminis tritici

“…Damit ist die Frage der Zuordnung der Enzymaktivitatsanderung autgeworfen. Diese bleibt solange offen, wie es nodi unmoglich ist, die Partner zu trennen oder wirtsfrele Infektlonshyphen in Kultur zu nehmen (GARTNER und FUCHS 1960). Es erscheint wahrscheinlich, dafi die In der dritten Phase festzustellende starke Steigerung aller mit demHMP-Weg verbundenen Enzymsysteme zu einem grofien Anteil dem Pilz, vor allem den Sporen, zuzuordnen Ist.…”

The Physiology of Rust Uredospores

“…Gystein and glutathione increased both growth and differentiation of infection structures on a buffered silica gel medium containing glucose, mineral salts, a high concentration of iron and undenatured egg yolk; pyridoxin promoted growth but not differentiation (32). Gystein was effective in the absence of egg yolk but glutathione was not; a later report indicated that egg yolk could be replaced by coconut milk (33). An interesting feature of these results is the activity of the two-SH containing reducing substances.…”

“…The differentiation of infection structures on water or on a range of artificial media is promoted by Zn++ (15,56,58), by cystein and glutathione (32,33), by unidentified, volatile stimulants (2, 30), by pelargonaldehyde (31), by exposure to the proper conditions of light and temperature (24,46) and by contact with artificial membranes (19,20,46). Of these, treatment with ALLEN'S stimulant and the manipulation of light and temperature are by far the most effective.…”