Rust Fungi of Southeast Asia

Tranzschelia discolor (Fuckel) Tranzschel & M.A. Litv.

Synonyms
Puccinia discolor Fuckel
Puccinia pruni-spinosae f. discolor (Fuckel) J.C. Fisch.
Tranzschelia pruni-spinosae var. discolor (Fuckel) Dunegan

Description
Uredinia on lower leaf surface, subepidermal, erumpent, round, yellow; paraphyses intrasoral, capitate, subhyaline to pale yellowish brown, 36-45 × 12-15 µm; wall 1.0 µm thick, thickened at apex (2.5-4.0 µm).

Urediniospores cylindrical, ellipsoidal, obovoid to oval, apex obtuse, subhyaline to yellowish brown at apex, 28-38 × 14-17 µm; wall 2.0 µm thick, apex thickened (5.0-6.0 µm), echinulate.

Telia on lower leaf surface, subepidermal, erumpent, dome-shaped, black, peridium and paraphyses present.

Teliospores cylindrical, apex rounded, 2 celled, reddish brown, 27-40 × 19-23 µm; wall 1.5-3.0 µm thick, 3.5-4.0 µm thick at apex, verrucose, pedicel persistent, up to 33 µm.

Specimens cited in description:
- BRIP 58385

Hosts
Host family:
- Rosaceae

Host species:
- Prunus persica

Distribution
Vietnam

Highslide JS
Tranzschelia discolor on Prunus persica - BRIP 58385.
Highslide JS
Tranzschelia discolor on Prunus persica - BRIP 58385.
Scale bar = 1 cm.
Highslide JS
Paraphyses of Tranzschelia discolor on Prunus persica - BRIP 58385.
Scale bar = 10 µm.
Highslide JS
Urediniospores of Tranzschelia discolor on Prunus persica - BRIP 58385.
Scale bar = 10 µm.
Highslide JS
Teliospores of Tranzschelia discolor on Prunus persica - BRIP 58385.
Scale bar = 10 µm.