Biomass and length of intraradical and extraradical mycorrhizal mycelium under ambient (aCO 2) and elevated (eCO 2) atmospheric CO 2 was investigated using a non-destructive in vivo experimental model system. Time-course experiments allowed measurements of intact extraradical mycelium spreading from mycorrhizal roots of Prunus cerasifera micropropagated plants inoculated with the arbuscular mycorrhizal fungus Glomus mosseae, in controlled environmental chambers. The length of extraradical mycelium was significantly increased at the highest CO 2 concentration, ranging from 10.7 to 20.3 m at aCO 2 and eCO 2, respectively. The biochemical determination of mycelial glucosamine content allowed the evaluation of intraradical and extraradical fungal biomass, which were 2 and 3 times larger at eCO 2 than at aCO 2. Present data show that Glomus mosseae responds to increases of CO 2 concentrations producing larger mycorrhizal networks which may potentially represent carbon sink agents in soil ecosystems. © 2010 German Mycological Society and Springer.
Fungal biomass production in response to elevated atmospheric CO2 in a Glomus mosseae–Prunus cerasifera model system
AVIO L;MORINI, STEFANO;GIOVANNETTI, MANUELA
2012-01-01
Abstract
Biomass and length of intraradical and extraradical mycorrhizal mycelium under ambient (aCO 2) and elevated (eCO 2) atmospheric CO 2 was investigated using a non-destructive in vivo experimental model system. Time-course experiments allowed measurements of intact extraradical mycelium spreading from mycorrhizal roots of Prunus cerasifera micropropagated plants inoculated with the arbuscular mycorrhizal fungus Glomus mosseae, in controlled environmental chambers. The length of extraradical mycelium was significantly increased at the highest CO 2 concentration, ranging from 10.7 to 20.3 m at aCO 2 and eCO 2, respectively. The biochemical determination of mycelial glucosamine content allowed the evaluation of intraradical and extraradical fungal biomass, which were 2 and 3 times larger at eCO 2 than at aCO 2. Present data show that Glomus mosseae responds to increases of CO 2 concentrations producing larger mycorrhizal networks which may potentially represent carbon sink agents in soil ecosystems. © 2010 German Mycological Society and Springer.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
