Owen Susan M, Clark Stuart, Pompe Matevz, Semple Kirk T
Department of Environmental Science, Lancaster University, Lancaster, UK.
FEMS Microbiol Lett. 2007 Mar;268(1):34-9. doi: 10.1111/j.1574-6968.2006.00602.x. Epub 2007 Jan 15.
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.
在斯洛文尼亚不同地点生长的三棵小叶杨树干周围距离达200厘米的根际土壤中，研究了一种（14）C标记的挥发性单萜化合物（香叶醇）向（14）CO₂的分解代谢。在每个地点的土壤表面检测到高达18微克 米⁻² 小时⁻¹的柠檬烯排放。作为引入土壤样品中的（14）C标记香叶醇分解代谢的产物，测定了（14）C标记CO₂的释放量。土壤中的土著微生物迅速降解了香叶醇。沿着从树干开始的梯度，分解代谢的相对滞后时间和速率存在显著差异，在距离树木最远点的土壤样品中，滞后时间相对较长，速率较低。
