Biogenic volatile organic compounds as potential carbon sources for microbial communities in soil from the rhizosphere of Populus tremula.
Catabolism of a (14)C-labelled volatile monoterpene compound (geraniol) to (14)CO(2) was investigated in soils taken from the rhizosphere at distances up to 200 cm from the trunks of three small Populus tremula trees growing at different sites in Slovenia. Emissions of limonene of up to 18 microg m(-2) h(-1) were detected from the soil surface at each site. Evolution of (14)C-labelled CO(2) was measured as a product of catabolism of (14)C-labelled geraniol introduced into the soil samples. Indigenous soil microorganisms degraded the geraniol rapidly. There was a significant difference in relative lag times and rates of catabolism along the gradient from the tree trunks, with relatively longer lag times and lower rates occurring in soil samples from the farthest point from the tree.
Owen
Susan M
SM
Department of Environmental Science, Lancaster University, Lancaster, UK. sue.owen@creaf.uab.es
Clark
Stuart
S
Pompe
Matevz
M
Semple
Kirk T
KT
D000080462:Acyclic Monoterpenes; D001419:Bacteria / Q000378:metabolism*; D002250:Carbon Radioisotopes / Q000378:metabolism*; D017753:Ecosystem; D018517:Plant Roots / Q000382:microbiology*; D032107:Populus / Q000382:microbiology*; D017524:Slovenia; D012987:Soil / Q000032:analysis; D012988:Soil Microbiology; D013729:Terpenes / Q000378:metabolism*; D014835:Volatilization
D000080462:Acyclic Monoterpenes; D002250:Carbon Radioisotopes; D012987:Soil; D013729:Terpenes; C007836:geraniol