The Co-occurrence and Morphological Continuum Between Ericoid Mycorrhiza and Dark Septate Endophytes in Roots of Six European Rhododendron Species
The Co-occurrence and Morphological Continuum Between Ericoid Mycorrhiza and Dark Septate Endophytes in Roots of Six European Rhododendron Species
复制标题
DOI：
10.1007/s12224-011-9098-5
复制
发表时间：
2011-03
影响因子：
1.2
通讯作者：
M. Vohník;J. Albrechtová
中科院分区：
文献类型：
--
作者：
M. Vohník;J. Albrechtová
杜鹃花科植物的根际真菌种类繁多，但最常见的是子囊菌属的杜鹃花科植物菌根真菌和暗隔内生菌（DSE），其次是担子菌属真菌和球状纲丛枝菌根真菌。研究了杜鹃花属6种欧洲本土杜鹃花属植物毛根中杜鹃花类真菌（ErM）、DSE共生体、外生真菌（EcM）和丛枝真菌（AM）的分布和形态多样性，结果表明：在所有被筛选植物中，EcM和AM均不存在，而ErM和DSE共生体同时存在;（2）它们的水平呈负相关，表明杜鹃花科植物在某些生境中对某些根-菌共生体有偏好; iii）最高的ErM定殖发生在南欧和中欧的站点，而最高的DSE定殖发生在芬兰北方的亚北极站点和喀尔巴阡山脉的亚高山站点，表明杜鹃花科根真菌协会的纬度/海拔变化; iv）一些菌丝体可以同时形成对应于ErM和DSE关联的结构，这偶尔导致独特的外生菌根定殖，包括细胞间薄壁组织网和细胞内菌丝线圈。这些结果表明，ErM真菌和DSE在欧洲杜鹃和ErM和DSE协会之间的形态连续的根之间的频繁的相互作用。新的外生菌根类型值得进一步研究。
Ericaceae associate with a wide spectrum of root mycobionts, but the most common are ascomycetous ericoid mycorrhizal fungi and dark septate endophytes (DSE), followed by basidiomycetous fungi and glomeracean arbuscular mycorrhizal fungi. We investigated distribution and morphological diversity of ericoid mycorrhizae (ErM), DSE associations, ectomycorrhizae (EcM) and arbuscular mycorrhizae (AM) in hair roots of six European nativeRhododendronspecies and found thati) while EcM and AM were absent, ErM and DSE associations were simultaneously present in all screened plants;ii) their levels were negatively correlated, suggesting Ericaceae preference for certain root-fungus association in certain habitats;iii) the highest ErM colonization occurred at sites in southern and central Europe, while the highest DSE colonization was found in a subarctic site in northern Finland and in a subalpine site in the Carpathians, suggesting a latitudinal/altitudinal shift in Ericaceae root-fungus associations;iv) some mycelia could simultaneously form structures corresponding to ErM and DSE association, which occasionally resulted in a unique ectendomycorrhizal colonization comprising an intercellular parenchymatous net and intracellular hyphal coils. These results indicate frequent interactions between ErM fungi and DSE in roots of European rhododendrons and a morphological continuum between ErM and DSE associations. The new ectendomycorrhizal type deserves further investigation.