Intracellular colonization ofRhododendron andVaccinium roots byCenococcum geophilum, Geomyces pannorum andMeliniomyces variabilis
Intracellular colonization ofRhododendron andVaccinium roots byCenococcum geophilum, Geomyces pannorum andMeliniomyces variabilis
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Cenoccum geophilum、Geomyces pannorum 和 Meliniomyces variabilis 在杜鹃和越橘根的细胞内定植
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发表时间：
2008
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通讯作者：
M. Vosátka
中科院分区：
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作者：
M. Vohník;M. Fendrych;J. Albrechtová;M. Vosátka
通过4个离体试验验证了地生空球藻（Cenococcum geophilumFr.）（菌株CGE-4）、腐营养型Geomyces pannorum（Link）Sigler &卡迈克尔（GPA-1）和一种常见的根相关的、可能形成杜鹃花类菌根（ErM）的Meliniomyces variabilisHambleton & Sigler（MVA-1）。以一种典型的ErM真菌Rhizoscyphus ericae（Read）Zhuang & Korf（RER-1）为对照。所有菌株均能在越橘微扦插根中定殖：GPA-1偶尔产生类似ErM的菌丝环，MVA-1和RER-1表现出典型的ErM定殖模式。CGE-4菌丝在新形成的根上和周围生长旺盛，很少穿透肿胀的根皮细胞，形成细胞内松散的环。除CGE-4菌株能促进杜鹃花微插穗生根外，其它菌株均不能促进杜鹃花微插穗生根，但CGE-4菌株也能促进杜鹃花微插穗生长。幼苗广泛分布的外生菌根真菌C. geophilum有可能定殖非EcM根，并支持它们的发展，这可能影响杜鹃花科植物的整体生长。如图G所示。pannorum，类似ErM的结构可能由迄今为止不被认为是杜鹃花科菌根的真菌形成。
Fourin vitro experiments were set up to verify the colonization potential of ectomycorrhizal (EcM)Cenococcum geophilumFr. (strain CGE-4), saprotrophicGeomyces pannorum (Link)Sigler & Carmichael (GPA-1) and a frequent root-associated, potentially ericoid mycorrhiza (ErM)-formingMeliniomyces variabilisHambleton & Sigler (MVA-1) in roots ofRhododendron andVaccinium. A typical ErM fungus,Rhizoscyphus ericae (Read)Zhuang & Korf (RER-1), was included for comparison. All fungal strains intracellularly colonized rootedVaccinium microcuttings: GPA-1 occasionally produced hyphal loops similar to ErM, MVA-1 and RER-1 exhibited a typical ErM colonization pattern. CGE-4 hyphae grew vigorously on and around newly formed roots and rarely penetrated turgescent rhizodermal cells forming intracellular loose loops. Rooting ofRhododendron sp. microcuttings was not promoted by any fungal strain except CGE-4, which also promoted the most vigorous growth ofRhododendron ponticum L. seedlings. The widespread EcM fungusC. geophilum has a potential to colonize non-EcM roots and support their development which may influence overall growth of ericaceous plants. As shown forG. pannorum, structures resembling ErM may be formed by fungi that are to date not regarded as ericoid mycorrhizal.