Sporisorium doidgeae (Zundel) Langdon & Full.

Synonyms

Sorosporium andropogonis-micranthi Y. Ling & T.L. Chen
Sorosporium andropogonis-micranthi (Y. Ling & T.L. Chen) Vánky
Sphacelotheca capillipedii L. Ling
Sphacelotheca doidgeae Zundel
Sphacelotheca pakistanica S. Ahmad
Sporisorium capillipedii (L. Ling) L.Guo

Description

Sori variable, sometimes destroying the entire inflorescence, or only some branches of the inflorescence, or some racemes or some spikelets of a raceme, cylindrical, irregularly branched or compound, often with intact inflorescence branches or groups of spikelets, 1070 mm long, 14 mm wide, partly hidden by the distal leaf sheath, initially covered by a brown peridium that ruptures irregularly, flakes away, exposing the dark brown semi-agglutinated to powdery mass of loose spore balls, spores and sterile cells surrounding a simple or irregularly branched columella.

Spore balls ephemeral, when young subglobose, ellipsoidal, 80100 µm diam., dark brown, composed of 50200? spores surrounded by a hyaline coat of hyphae which gelatinises and disappears at maturity.

Spores when mature solitary, globose, subglobose to ellipsoidal to subpolyhedrally slightly irregular, 8.0–10.5 (–12) × 8.0–9.5 µm, yellowish brown; wall uniformly c. 0.5 µm thick, apparently smooth to finely and densely punctate or verruculose-echinulate; spore profile ±smooth, in SEM densely and finely verruculose between short spines.

Sterile cells in irregular groups or in chains; individual cells irregular, with 1 or several flattened sides, rarely globose, 611 (–15) × 510 µm, hyaline, collapsed in old specimens; wall c. 0.5 µm thick, smooth.

Hosts
   
Host family: Poaceae
   
Host species: Bothriochloa bladhii (Retz.) S.T.Blake
Bothriochloa ewartiana (Domin) C.E.Hubb.
Bothriochloa fecundum S.T.Blake
Capillipedium parviflorum (R.Br.) Stapf
Capillipedium spicigerum S.T.Blake
Dichanthium tenue (R.Br.) A.Camus

Distribution

States & Territories: NT, NSW, QLD

Comments

Sporisorium doidgeae is distinguished from other smut fungi on Bothriochloa, Capillipedium and Dichanthium, by its sori, which often destroy some branches of the inflorescence, some racemes or some spikelets. Thus, the sori are often attached to intact inflorescence branches or groups of spikelets.