rhizoplanen.
/ˈrʌɪzə(ʊ)pleɪn/, U.S. /ˈraɪzəˌpleɪn/ Biology.
The external surface of a plant root with any adherent particulate material; the microenvironment constituted by this. Frequently attributive. Cf. rhizosphere n.
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the world > plants > part of plant > root > [noun] > root-ball or rhizoplane
root ball1837
rhizoplane1949
1949 F. E. Clark in Adv. Agronomy 1 246 It would be more logical to speak of this microflora in terms of the root surfaces than in terms of the soil adjacent to the roots of plants. This goal can be obtained by the use of the term, rhizoplane. The rhizoplane is defined as the external surfaces of plant roots together with any closely adhering particles of soil or debris.
1961 Canad. Jrnl. Bot. 39 175 Infestation of the roots of tomato seedlings with naturally occurring rhizoplane fungi.
1975 Sydowia Annales Mycologici 27 312 (title) A list of fungi isolated from rhizosphere, rhizoplane and soil.
1985 Soil Biol. & Biochem. 17 714/1 In our experiments many of the rhizoplane bacteria would be embedded in mucigel, but it seems that few of them could degrade it.
2005 Plant Physiol. 139 1066/1 Electron microscopy observations of the rhizoplane showed bacterial colonies to be also closely associated with sloughing root cap cells.
This entry has been updated (OED Third Edition, June 2010; most recently modified version published online March 2022).
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n.1949