Ustilago filiformis (Schrank) Rostr. 1890

on Glyceria

Ustilago filiformis on Glyceria maxima

Glyceria maxima, Belgium, prov. Antwerp, Balen, Griesbroek © Carina Van Steenwinkel

Ustilago filiformis on Glyceria maxima

sori with intact and ruptured epidermis

Ustilago filiformis on Glyceria maxima

the spore mass looks blackish brown…

Ustilago filiformis: spores

… but under the microscope the 5-7 µm alrge, smooth spores appear hyaline

gall

Sori form long, dark parallel striae over the leaves, sometimes also the sheaths and culm; they contain an olive-brown, powdery mass of spores. Spores 3-6 µm, smooth. The fungus is systemic; infected plants usually do not flower.

hostplants

Poaceae, monophagous

Glyceria arundinacea, declinata, fluitans, lithuanica, maxima, nemoralis, notata.

Losa España reports the species also from Catabrosa aquatica; in the illustration he presents the spores are in irregular clumps, what reminds of Jamesdicksonia dactylidis, but the size of the spores clearly points to filiformis.

synonyms

Ustilago longissima (Sowerby) Meyen, 1841.

references

Ainsworth & Sampson (1950a), Almaraz (1998a), Astiz Gasso, Lovisolo & Perelló (2015a), Buhr (1964b), Doppelbauer & Doppebaur (1973a), Jage, Klenke, Kruse ao (2016a), Jage, Kruse, Kummer ao (2013a), Jage, Scholler & Klenke (2010a), Klenke & Scholler (2015a), Kozłowska, Mułenko & Heluta (2015a), Losa España (1942a, 1944a), Lutz & Vánky (2009a), Savchenko & Heluta (2012a), Scholler & Schubert (1993a), Scholz & Scholz (2013a), Tomasi (2014a), Tóth (1994a), Vanderweyen & Fraiture (2014a), Vánky (1994a), Vánky & Abbasi (2013a), Zwetko (1993a).

23/03/2017

pub 25.v.2017 · mod 12.viii.2017