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The majority of plants, strictly speaking, do not have roots; they have mycorrhiza. A mycorrhiza is a symbiotic association of a fungus with plant roots, found in the majority of plant species. The most widely distributed mycorrhizal 'type', both through the plant kingdom (formed by about 80% of all vascular plants) and geographically, is an endomycorrhiza formed by the Glomeromycota and called arbuscular mycorrhiza (AM). In this, hyphae colonize plant cells and produce finely branched structures (the arbuscules). This symbiosis feeds most land plants with nutrients from the soil.
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