Hodge Angela
Department of Biology, The University of York, PO Box 373, York, YO10 5YW, UK.
New Phytol. 2001 Sep;151(3):725-734. doi: 10.1046/j.0028-646x.2001.00200.x.
• The contribution of different arbuscular mycorrhizal fungi (AMF) to nutrient capture from an organic patch, and the subsequent impact on root proliferation was investigated. • Organic patches were created with glycine labelled with N and C. This allowed decomposition (as CO release) and uptake of nutrients (as C and N enrichments in the plant tissues) to be followed. Changes in root responses were followed in situ by the use of minirhizotrons and compared to responses in control (H O) patches. • Although there were differences in internal colonization and external mycelium production among the three AMF tested, none of the fungi responded to the presence of the glycine patch, and N and C capture was no different to uncolonized controls. However, the presence of glycine affected the manner in which colonized roots responded, particularly below the patch. The presence of AMF affected the decomposition of glycine. • Root responses to the presence of N-rich patches appear more important than AMF responses.
• 研究了不同丛枝菌根真菌（AMF）对从有机斑块中获取养分的贡献，以及随后对根系增殖的影响。
• 用标记有氮和碳的甘氨酸创建有机斑块。这使得能够追踪分解过程（以二氧化碳释放量表示）和养分吸收情况（以植物组织中的碳和氮富集量表示）。通过使用微根窗原位追踪根系反应的变化，并与对照（水）斑块中的反应进行比较。
• 尽管在所测试的三种AMF之间，内部定殖和外部菌丝体产生存在差异，但没有一种真菌对甘氨酸斑块的存在做出反应，并且氮和碳的捕获与未定殖的对照没有差异。然而，甘氨酸的存在影响了定殖根系的反应方式，特别是在斑块下方。AMF的存在影响了甘氨酸的分解。
• 根系对富含氮的斑块的反应似乎比AMF的反应更重要。
