root_system_classification

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• Label: Root system morphology
• Entity URI: https://w3id.org/APD/traits/trait_0012112
• Type: categorical
• Definition: A root system morphology trait [TO:0000985] which are categorical [STATO:0000252] trait values that capture the branchiness [PATO:0002009] and texture [PATO:0000150] of the root system [PO:0025025] and the root system depth [TO:0001058].;Categorical root system descriptions that indicate the branchiness and texture of the root system and the depth of the root system.
• Additional comments: The trait values listed are those specified in the root system classification scheme proposed by Cannon in 1949.
• Allowed values:

  value	description
  type_i	The primary root is fibrous or fleshy and is relatively long; mesophytic.
  type_ii	The primary root is relatively short and is fibrous. Roots are well branched in a dry habitat but branch little in one that is wet.
  type_iii	The primary root is usually long and fibrous. The first order lateral roots are well branched and are usually short; they are rather evenly distributed along the primary root; xerophytic.
  type_iv	The primary root is usually long and slender like that of Type II. The first order lateral roots are well branched. Those closest to the surface of the ground, or not far below, are relatively long; xerophytic and mesophytic.
  type_ix	Adventitious roots that arise on the aerial stem and branches of some herbaceous taxa, shrubs, and trees; on creepers, vines, and runners; and on subterranean rhizomes and stolons.
  type_v	The primary root is divided-forked or branched-and fibrous, and with few first order lateral roots, or, in age, apparently with none; xerophytic.
  type_vi	The primary root is usually as in Type V. The first order lateral roots are mostly on the upper portion of the primary root and are thus relatively superficial; xerophytic or in well aerated sandy soil where the rainfall is not light.
  type_vii	Adventitious roots that are in one group and arise on a short horizontal, or vertical, axis of the shoot. They are fibrous or fleshly; mesophytic and hydrophytic.
  type_viii	Adventitious roots that are in one group and are fibrous and fleshy, or fibrous and thick. The fibrous adventitious roots are absorbing-anchoring roots and are usually with laterals to the second order; meophytic.

See the AusTraits Plant Dictionary (https://w3id.org/APD/traits/trait_0012112) for additional information about this trait.

Coverage

For this trait, AusTraits includes a total of 30 records. This includes:

• data for 22 species.
• data for 12 families.
• data from 1 datasets (see the portal Citations tab for a list of sources)