Purple myxomycete pustular fungus

Purple myxomycete pustular fungus
Purple myxomycete pustular fungus
Systematics
Class : Sordariomycetes Subclass : Hypocreomycetidae Order : Crust ball mushrooms (Hypocreales) Family : Bionectriaceae Genre : Nectriopsis Type : Purple myxomycete pustular fungus
Scientific name
Nectriopsis violacea
( JC Schmidt ex. Fr. ) Maire

The violet myxomycete pustular fungus ( Nectriopsis violacea , syn .: Nectria violacea ) is a hose fungus from the order of the crust ball-like mushrooms (Hypocreales), which lives parasitically on the yellow tan blossom .

features

Macroscopic features

The host's aethalium , the yellow tufted flower, is completely overgrown by a pale purple hyphae that appears dotted with the densely sown dark purple perithecia sunk into the mycelium . These are 0.2 to 0.4 mm wide, round to pear-shaped, hairy on the outside and only have a thin cell wall.

Microscopic features

The cylindrical tubes measure (40) 50-60 x 3-5 microns. Inside there are eight cylindrical spores that reach 5–6 × 2–2.5 micrometers. They are simply septate , smooth, and hyaline.

The number of chromosomes is n = 4.

Characteristics on culture media

The colony grows on cornmeal dextrose agar about 2-3 cm in a week, with a white mycelium, slightly wavy at the edge, which forms only a little aerial mycelium. On oatmeal agar, a felty mycelium with a diameter of 3 to 5 cm, which consists of concentric rings, is formed in one week. On so-called V8 agar, the mycelium is also tomentose, but purple in the center and whitish only towards the edge. Unbranched or smooth phialides standing together in twos or threes are formed as conidiophores on all three nutrient media . They are 30-50 micrometers long and slightly tapered towards the tip. There the elliptical conidia are formed in individual, slimy heads . These are smooth-walled, hyaline, and measure 6–9.5 × 2–3 micrometers.

Species delimitation

The purple myxomycete pustular fungus is almost unmistakable due to its color and its occurrence on the yellow tan blossom. However, the closely related Nectriopsis nigricans also occurs on the yellow tan flower, but has white perithecia and a whitish hyphae.

Ecology and diffusion

The yellow tan blossom is the only host of Nectriopsis violacea

Nectriopsis violacea grows exclusively on the yellow tan blossom ( Fuligo septica ). It is relatively rare and can be found in summer and autumn. The species is widespread in Europe and North America, particularly in swamps, where the yellow tan blossom lives on Sphagnum .

Systematics

Nectriopsis violacea was first described by Schmidt in 1817 described and then by Fries as Sphaeria violacea published. For a long time the species was then assigned to the genus Nectria . Maire then placed the species in the genus Nectriopsis in 1911 . This genus includes species that have round or slightly pointed ascospores and perithecia embedded in a hypen plexus. The minor crop form was described as Acremonium fungicola in 1971.

swell

literature

• Svengunnar Ryman & Ingmar Holmåsen: mushrooms . Bernhard Thalacker Verlag, Braunschweig 1992. ISBN 3-8781-5043-1 , p. 688.

Individual evidence

1. ↑ ^{a b c} Svengunnar Ryman & Ingmar Holmåsen: Mushrooms. Bernhard Thalacker Verlag, Braunschweig 1992, ISBN 3-8781-5043-1
2. ^ ^{A b c d e f} Gary J. Samuels, 1973: The Myxomyceticolous Species of Nectria . Mycologia 65: pp. 401-420.
3. ↑ ^{a b} Clark T. Rogerson and Steven L. Stephenson, 1993: Myxomyceticolous Fungi. Mycologia, Vol. 85: pp. 456-469.

Web links

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