期刊
PLANT SIGNALING & BEHAVIOR
卷 2, 期 2, 页码 125-126出版社
TAYLOR & FRANCIS INC
DOI: 10.4161/psb.2.2.3970
关键词
Aglaophyton major; endomycorrhiza; Glomeromycota; Nothia aphylla; Early Devonian; Rhynie chert
资金
- National Science Foundation [EAR-0542170]
- Alexander von Humboldt-Foundation [V-3.FLF-DEU/1064359]
- Deutsche Forschungsgemeinschaft [Ke 584/13-1]
Rhizomatous axes of Nothia aphylla, a land plant from the 400-myr-old Rhynie chert, host a fungus that closely resembles Glomites rhyniensis (Glomeromycota), the endomycorrhizal fungus of the Rhynie chert plant Aglaophyton major. However, G. rhyniensis is an intercellular endophyte that becomes intracellular exclusively within a well-defined region of the cortex, while the fungus in N. aphylla initially is intracellular but later becomes intercellular in the cortex. We hypothesize that N. aphylla displays an alternative mode of colonization by endomycorrhizal fungi, perhaps related to the peculiar internal anatomy of the lower portion of the rhizomatous axis, in which the radial arrangement of cells, along with the virtual absence of intercellular spaces, provides no intercellular infection pathway into the cortex.
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