THE INFLUENCE OF SOIL-MOISTURE AND FLOODING ON FORMATION OF VA-ENDOMYCORRHIZAE AND ECTOMYCORRHIZAE IN POPULUS AND SALIX
THE INFLUENCE OF SOIL-MOISTURE AND FLOODING ON FORMATION OF VA-ENDOMYCORRHIZAE AND ECTOMYCORRHIZAE IN POPULUS AND SALIX
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DOI：
10.1007/bf02220718
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发表时间：
1989-07-01
期刊：
影响因子：
4.9
通讯作者：
LODGE, DJ
中科院分区：
文献类型：
--
作者：
LODGE, DJ
发现外生菌根真菌的原生混合物[主要是Gigaspora calospora、G. margarita、Glomus sp.]主要感染田间和对照实验中非常潮湿但排水良好的土壤中的杨树和柳根（0至-0.2 MPa），而VA-内生菌根真菌的原生混合物感染根部的时间要长得多。 土壤湿度范围更广（淹至-3.4 MPa）。尽管湿度梯度实验表明，潮湿土壤中的内生菌根形成量比非常干燥或淹没的土壤中的多，但这种模式在沿排水梯度的田间横断面中却相反。田间 VA 内生菌根真菌的感染率最低，而外生菌根真菌的感染率较高，这表明真菌共生体之间可能存在拮抗作用。外生菌根形成的狭窄湿度范围，以及内生菌根真菌和外生菌根真菌之间的拮抗作用，显然结合起来产生了自然界中发现的菌根分布。
Native mixtures of ectomycorrhizal fungi [predominantly Gigaspora calospora, G. margarita, Glomus sp.] were found to infect Populus and Salix roots primarily in very moist but well drained soils in both the field and in controlled experiments (0 to -0.2 MPa), whereas native mixtures of VA-endomycorrhizal fungi infected roots over a much wider range of soil moisture (flooded to -3.4 MPa). Although a moisture gradient experiment showed endomycorrhizal formation was greater in moist soil than in very dry or flooded soils, this pattern was reversed in field transects along drainage gradients. Infection by VA-endomycorrhizal fungi in the field was the lowest where infection by ectomycorrhizal fungi was high, which suggests possible antagonism among the fungal symbionts. The narrow moisture range for ectomycorrhizal formation, and antagonism among endo- and ectomycorrhizal fungi, apparently combine to produce the mycorrhizal distributions found in nature.