| Definition |
Roots that form specifically at the root-shoot junction (e.g. Arabidopsis and bean) |
Roots that form on the hypocotyl
(e.g. bean and tomato) |
Nodal roots that form below soil level as part of normal postembryonic development (e.g. rice, wheat, and maize) |
Nodal roots that form above soil level as part of normal postembryonic development (e.g. maize) |
Roots that form from nodes (e.g. strawberry and grass rhizomes) |
Roots that form from internode
(e.g. ivy) |
Roots used for physical support (e.g. mangroves, where they also aid in aeration via lenticels and aerenchyma) |
| Induced by |
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| Flood |
|
Flood-induced hypocotyl roots |
Flood-induced crown roots |
Flood-induced brace roots |
Flood-induced nodal roots |
Flood-induced stem roots |
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| Burial (including layering in propagation) |
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Burial-induced nodal roots |
Burial-induced stem roots |
|
| Etiolation |
|
Etiolation-induced hypocotyl roots |
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| Wound |
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Wound-induced stem roots |
Wound-induced prop roots |
| Heavy metals |
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Heavy-metal-induced crown roots |
Heavy metal-induced brace roots |
Heavy metal-induced nodal roots |
Heavy metal-induced stem roots |
|
| Nutrient |
|
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Nutrient-induced crown roots |
Nutrient-induced brace roots |
Nutrient-induced nodal roots |
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