Stöckel, M; Meyer, C; Gebauer, G: The degree of mycoheterotrophic C gain in green, variegated and vegetative albino individuals of Cephalanthera damasonium is related to leaf chlorophyll concentrations, New Phytologist, 189, 790-796 (2011), doi:10.1111/j.1469-8137.2010.03510.x

• Achlorophyllous variants of some forest orchids are known to reach almost the same size as their green forms. These vegetative albino forms cover their entire carbon (C) demand through fungi that simultaneously form ectomycorrhizae with trees, while green variants partially draw on C from photosynthesis and C from fungal hosts. Here, we investigate whether the amount of C derived from either source is proportional to leaf chlorophyll concentration. The discovery of two Cephalanthera damasonium populations with variegated leaves enabled a continuous bridging of leaf chlorophyll concentrations between green and albino forms.

• Leaves of 27 green, variegated and albino individuals of C. damasonium were compared for chlorophyll concentrations, C sources (as characterized by 13C abundances) and total C and nitrogen (N) concentrations.

• We found a linear relationship between leaf chlorophyll concentrations and the proportional reliance on fungi as a C source. Furthermore, we show that the shift in C gain through mycoheterotrophic means significantly changes leaf total C and N concentrations.

• Our results document that partial mycoheterotrophy in C. damasonium is not a static nutritional mode but a flexible mechanism related inter alia to leaf chlorophyll concentrations. The change in proportional reliance on fungi as a C source affects leaf chemical composition.

Upcoming ...

BayCEER Colloquium:
Th. 2022-01-27
BayCEER Member Assembly
Digitale Vortragsreihe KlimaDiskurse (bayklif):
Tu. 2022-02-08
10.000 Klafter Holz oder eine grüne Menschenfreude?
Ecological-Botanical Garden:
Su. 2022-02-06
Führung | Edel und gut? Tropenhölzer und heimische Alternativen
Su. 2022-02-20
Vortrag "Zwischen Elburs und Zagros: Auf botanischer Sammelreise im Irak"
Su. 2022-03-06
Sonntagsführung | Angepasst! Tropische Schmetterlinge und ihre Raupen-Futterpflanzen
Weather research site
Luftdruck (356m): 988.6 hPa
Lufttemperatur: 1.6 °C
Niederschlag: 0.0 mm/24h
Sonnenschein: <1 h/d
Wind (Höhe 17m): 2.3 km/h
Wind (Max.): 4.0 km/h
Windrichtung: SW

Globalstrahlung: 2 W/m²
Lufttemperatur: -1.9 °C
Niederschlag: 0.0 mm/24h
Sonnenschein: <1 h/d
Wind (Höhe 32m): 0.0 km/h

This site makes use of cookies More information