Tello, SA; Silva-Flores, P; Agerer, R; Halbwachs, H; Beck, A; Peršoh, D: Hygrocybe virginea is a systemic endophyte of Plantago lanceolata, Mycological Progress, accepted (2013)

Species of Hygrocybe (waxcaps) are mostly colorf ul mushrooms, which are characteristic of undisturbed grasslands. These fungi are endangered in many places worldwide, but their biology remains a my stery: while isotopic signatures indicate that waxcaps are neither mycorrhizal nor saprotrophic, they were recently observed in plant roots and molecularly detected in aboveground tissues. We aimed to establish a model system of Plantago lanceolata plants colonized by H. coccinea for future detailed studies of the plant–fungus association, and species-specific primers were designed to control infection success and screen environmental samples for waxcaps. The experimentally treated plants grown from surface-sterilized seeds were indeed colonized by waxcaps after 22 weeks of incubation. However, the fungal infection was independent from the experimental treatment and apparently resulted from infected seeds. Screening of field material confirmed that at least one species, i.e., H. virginea, is a maternally transmitted endophytic fungus associated with P. lanceolata. In the experiments, it obviously expanded to the roots during or after seed germination. The endophytic growth is also consistent with the carbon isotopic signature of Hygrocybe, which deviates less from the host plants’ signature than known from ectomycorrhizal associations. However, waxcaps obviously acquire nitrogen (N) from a source outside the plant, like mycorrhizal fungi do. The extensive root system of P. lanceolata is hy pothesized to facilitate reaching of nitrogen sources for Hygrocybe which are enriched in the heavier 15N isotope.

Upcoming ...

BayCEER Colloquium:
Th. 2017-10-26
Electrical imaging of subsurface nano- and micro-scale particle injections for in situ groundwater remediation
Ökologisch-Botanischer Garten:
Th. 2017-10-26
Blumen.Berge.Erlebtes: Finissage
Su. 2017-11-05
Eiserne Reserve: Pflanzen mit Wintersteher-Früchten
Su. 2017-11-05
Leibniz, die Welt und wir - Malerei, Lithografie, Installation
Su. 2017-11-12
Unwiderstehlich: BlütendüftVortrag: Wild- und Nutzpflanzen
Weather research site
Luftdruck (356m): 970.4 hPa
Lufttemperatur: 10.0 °C
Niederschlag: 1.5 mm/24h
Sonnenschein: <1 h/d
Wind (Höhe 17m): 11.8 km/h
Wind (Max.): 26.3 km/h
Windrichtung: SW

Globalstrahlung: 52 W/m²
Lufttemperatur: 6.3 °C
Niederschlag: 3.3 mm/24h
Sonnenschein: <1 h/d
Wind (Höhe 32m): 12.0 km/h
Wind (Max.): 27.3 km/h