Rhizosphere

Rhizosphere [ Botany ]

Dictionary of botanic terminology - index of names

The soil zone immediately surrounding a growing plant root system, normally the location of large populations of microorganisms

The rhizosphere is a special environment near the root itself, together with that volume of soil which it influences that is, a few millimetres from the root. That zone of the soil is modified as a result of the uptake and deposition of substances by a growing root and by the increased number of microorganisms (eg Rhizobia) that live there, in association with plant roots. The microbial growth is stimulated by root exudates (the rhizosphere effect).
It is also the site where nutrients are transformed for take-up by the plant.

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