Arbuscular mycorrhizal hyphosphere as a soil nutrient turnover hotspot

Vortragender: Dr. Jan Jansa, Laboratory of Fungal Biology, Institute of Microbiology of the Czech Academy of Sciences, Prague (Homepage)
Do. 25.11.2021 (12:15-13:45), online-only

Arbuscular mycorrhizal fungi (AMF) efficiently take up mineral nutrients such as phosphorus and nitrogen (N) from the soil solution, and trade them for organic carbon with their host plants. Acquisition of nutrients bound in organic forms by the AMF under unsterile soil conditions has previously been reported, assuming an important role of soil prokaryotes, yet without proper mechanical understanding. Here a synthetic approach to study involvement of such inter-kingdom interactions in utilization of organic nutrients is presented, employing 15N-labelled chitin (an organic N source) added to AM fungal (Rhizophagus irregularis) hyphosphere under in vitro conditions, with or without other microorganisms. Upon presence of Paenibacillus sp., the AMF and their associated host plant obtained several-fold larger quantities of N from the chitin than they did with other bacteria, whether chitinolytic or not. Moreover, upon adding a protist Polysphondylium pallidum to the hyphosphere with Paenibacillus sp., the gain of N from chitin by the AMF and the associated plant further and significantly increased, pointing to soil microbial loop as the underlying mechanism.

 

*** invited by Johanna Pausch, Agroecology



Export as iCal: Export iCal
Aktuelle Termine


BayCEER-Kolloquium:
Do. 09.12.2021
Understanding mycorrhizal functions across scales
Do. 16.12.2021
Abschiedsvorlesung: Wozu lassen sich Modelle von Ökosystemen verwenden?
Digitale Vortragsreihe KlimaDiskurse (bayklif):
Di. 14.12.2021
Tropisches Eis? Die Macht der Kunst im Kampf um 1.5°
Di. 11.01.2022
Wie gelingt die Energiewende? Soziale Innovationen als Motor der Transformation
Ökologisch-Botanischer Garten:
So. 02.01.2022
Führung | Mit kühlem Kopf ins Neue: Winterspaziergang
Wetter Versuchsflächen
Luftdruck (356m): 960.6 hPa
Lufttemperatur: -0.2 °C
Niederschlag: 0.4 mm/24h
Sonnenschein: 1 h/d
Wind (Höhe 17m): 9.9 km/h
Wind (Max.): 24.1 km/h
Windrichtung: SO

...mehr
Globalstrahlung: 102 W/m²
Lufttemperatur: -2.8 °C
Niederschlag: 0.0 mm/24h
Sonnenschein: <1 h/d
Wind (Höhe 32m): 0.0 km/h

...mehr
Diese Webseite verwendet Cookies. weitere Informationen