Carbon allocation to ectomycorrhizal roots and mycelium colonising different mineral substrates
Carbon allocation to ectomycorrhizal roots and mycelium colonising different mineral substrates
复制标题
DOI：
10.1111/j.1469-8137.2004.01080.x
复制
发表时间：
2004-06-01
期刊：
影响因子：
9.4
通讯作者：
Finlay, RD
中科院分区：
文献类型：
--
作者：
Rosling, A;Lindahl, BD;Finlay, RD
外生菌根真菌大量存在于森林土壤的矿物质层中，但它们与矿物质基质的相互作用在很大程度上尚不清楚。通过对樟子松（Pinus sylvestris）幼苗的外生菌根根和菌丝体在不同无机基质上的增殖情况进行研究，利用电子自动射线照相技术（electronic auto radiography）对樟子松（Pinus sylvestris）幼苗的外生菌根根和菌丝体在不同无机基质上的碳分配模式进行了监测。与泥炭藓泥炭相比，更大部分的光合作用产生的碳被分配到矿物土壤基质。在H. crustuliniforme，碳分配显着更大的根和菌丝体殖民补丁的纯钾长石比那些补丁的石英。这些结果表明，外生菌根菌丝体可能会响应不同的矿物基质的存在下，通过调节他们的生长和活动。
Ectomycorrhizal fungi occur abundantly in the mineral horizons of forest soils, but their interactions with mineral substrates are largely unknown. We have examined the proliferation of ectomycorrhizal roots and mycelium colonising different mineral substrates.By exposing the shoots of Pinus sylvestris seedlings to air containing (CO2)-C-14, the carbon allocation patterns in intact ectomycorrhizal associations could be monitored using electronic auto radiography.In plants colonised by either Hebeloma crustuliniforme or Piloderma fallax, a larger fraction of the photosynthetically derived carbon was allocated to a mineral soil substrate compared with a Sphagnum peat. In mycorrhizal seedlings colonised by H. crustuliniforme, carbon allocation was significantly greater to roots and mycelia colonising patches of pure potassium feldspar than to those in patches of quartz.These results suggest that ectomycorrhizal mycelia may respond to the presence of different mineral substrates by regulating their growth and activity.