Natural populations and habitats are spatially heterogeneous: organisms and the resources they use are not uniformly distributed over space or time, but instead are found in different degrees of aggregation. The rhizosphere, that region of soil surrounding plant roots where microbial activity is influenced by the root, is one of the most microbiologically active habitats on earth. The rhizoplane, the innermost boundary of the rhizosphere, is the surface of the plant root including root hairs, and is a hot spot of plant–microbe activity. Bacteria and fungi on the rhizoplane are favorably positioned to intercept root exudates, and rhizoplane sites are points of root interaction with plant pathoens as well as beneficial microbes.
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Knudsen, G.R., Dandurand, LM. (2007). Analysis Of Spatial Patterns Of Rhizoplane Colonization. In: Franklin, R.B., Mills, A.L. (eds) The Spatial Distribution of Microbes in the Environment. Springer, Dordrecht. https://doi.org/10.1007/978-1-4020-6216-2_5
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