1. PaDIL Species Factsheet

Scientific Name: Fulvisporium restifaciens (D.E. Shaw) Vánky , , Microbotryales, Ustilentylomataceae

Common Name Austrostipa Smut Live link: http://www.padil.gov.au/aus-smuts/Pest/Main/140010

Image Library Smut Fungi of Australia Live link: http://www.padil.gov.au/aus-smuts/

Partners for Smut Fungi of Australia image library

Queensland Government https://www.daf.qld.gov.au/ 2. Species Information

2.1. Details Specimen Contact: Roger Shivas - [email protected] Author: Roger Shivas Citation: Roger Shivas (2010) Austrostipa Smut(Fulvisporium restifaciens )Updated on 11/30/2010 Available online: PaDIL - http://www.padil.gov.au Image Use: Free for use under the Creative Commons Attribution-NonCommercial 4.0 International (CC BY- NC 4.0)

2.2. URL Live link: http://www.padil.gov.au/aus-smuts/Pest/Main/140010

2.3. Facets Columella: absent Distribution: ACT, NSW, QLD, TAS, VIC Host Family: Poaceae Peridium: absent Sorus position: stems Sorus shape: indistinct (includes leaf spots) Spore balls: present Spore mass texture: granular, powdery Spore shape: globose or subglobose, irregular, ovoid to ellipsoidal, polyhedral or subpolyhedral Spore surface ornamentation: smooth Status: Native Australian Species Sterile cells: absent

2.4. Other Names Sorosporium restifaciens (D.E. Shaw) Thirum. & Neergaard Tolyposporium restifaciens D.E. Shaw

2.5. Diagnostic Notes **Sori** in the distal internode(s) of stems, when mature resembling twisted teased-out ropes, 20–50 (–90) cm long, 0.5–1.0 cm wide, consisting of vascular bundles, whereas the intervascular parenchyma is destroyed and replaced by a yellowish brown (later cinnamon-brown) granular-powdery mass of spore balls.

**Spore balls** subglobose, broadly ellipsoidal, ovoid, often elongate or slightly irregular, (12–) 16–40 (–55) × (10–) 13–32 µm, golden yellow to pale yellowish brown, translucent, composed of (1–) 5–25 (or more?) firmly cohering spores.

Spores rounded, with flattened contact sides, or ovoid, ellipsoidal, elongate, hemiglobose to subpolyhedrally irregular, 8–14 (–16) × 6–12 (–13) µm, pale golden yellow; wall smooth, 1–2 (–3) µm thick, thinner on the contact sides, thicker at the angles. In the centre of the free surface the exospore is thin, forming a round c. 2 µm wide germ pore that protrudes slightly in rehydrated spores forming a small papilla; in dehydrated spores it is depressed. Sporogenous hyphae growing between the cells of the stem parenchyma. Later, thin-walled hyaline spore ball initials are formed between the parenchyma cells, these increasing in size, becoming thick- walled and slightly pigmented; at maturity, the epidermis ruptures releasing the spore masses.

**Spore germination** resulting in 4-celled basidia 5–25 (–28) × 2–3 (–4) µm. Basidiospores sessile (without sterigmata), produced laterally and terminally, ovoid or long-ellipsoidal, 4–8 × 1.5–2.0 µm. 3. Diagnostic Images

Fulvisporium restifaciens on Austrostipa Fulvisporium restifaciens on Austrostipa aristiglumis - BRIP 45943. Scale bar = 1 cm. aristiglumis - BRIP 45943. Scale bar = 1 cm. Host symptoms: Roger Shivas DEEDI Host symptoms: Roger Shivas DEEDI

Fulvisporium restifaciens on Austrostipa sp. Fulvisporium restifaciens on Austrostipa - BRIP 14735. Scale bar = 10 µm. variabilis - BRIP 39179. Scale bar = 10 µm. Light micrograph: Roger Shivas DEEDI Scanning Electron Micrograph: Desley Tree DEEDI

Results Generated: Sunday, October 3, 2021