The production of uredia and telia in Uromyces pisi is shown to depend on the pH of the host tissue. Uredia and telia develop in tissues with pH above and below 6.3–6.5 respectively, confirming previous findings in cereal rusts and extending them to dicotyledons.
Benada J. (1967): The dependence on the pH of the host tissue for the production of Uredia and Telia in Uramyces pisi (Pers.) de Bary. – Česká Mykologie 21(2): 90–91.