The rhizosphere(根际) Width not to scale Layer of soil surrounding the -Root- growing root that is affected by the root(concept) pidermal and cortical cells Usually a few mm wide, up to lysed and invaded say 1 cm(no sharp boundary) by bacteria Extent depends on plant properties; e.g 20 CIm Root hair length density Micro-organisms Rhizodeposition(exudates etc) with microbial and plant mucilages spreading into the sd Nutrient uptake versus supply Sloughed root cap celis Root cap Mycorrhizospheres'(菌根际)can extend many cm RoviraThe rhizosphere(根际) Rovira 1960? • Layer of soil surrounding the growing root that is affected by the root (concept) • Usually a few mm wide, up to say 1 cm (no sharp boundary)* • Extent depends on plant properties; e.g. - Root hair length & density - Rhizodeposition (exudates etc) - Nutrient uptake versus supply Width not to scale * ‘Mycorrhizospheres’ (菌根际)can extend many cm c