root modification and symbiosis

Root type with a large central pith and multiple alternating xylem/pholem groups

typical monocot roots

broad supporting rootsath the bases of some tropical trees

buttress roots

upward-projecting respiratory roots common in waterlogged habitats

pneumatophores

mutualistic fungal association that improves root mineral uptake, especially phosphorus

mycorrhiza

Legume root structure housing nitrogen-fixing bacteria such as Rhizobium

root nodules

supporting roots that descend from stems or branches

prop roots

adventitious supporting roots growing diagonally from lower stem nodes as in maize

stilt roots

roots that contract to pull bulbs or corms deeper into soil

contractile roots

structures of parasitic plants that penetrate a host to absorb resources

Haustoria