Term Information

Accession
PO:0025352
Name
tubercle
Ontology
plant_anatomy
Synonyms
podaria (exact, plural), podarium (exact), 小塊茎、塊根 (Japanese, exact)
Alternate IDs
None
Definition
An enlarged leaf base (PO:0020040) that is fused with adjacent shoot axis (PO:0025029) tissue. Source: JSTOR:3093870, ISBN:9780881928501
Comment
Found in cacti and other succulents. The upper part of a leaf from which a tubercle develops is usually shed early in development. Tubercles are often conical, but they may merge with those directly above and below to form ribs, as in saguaro (Carnegiea), or they may elongate, as in species of pincushion cacti (Mammillaria). In species with tubercles, the areole bud (PO:0025353) is often found at the distal end of the tubercle. The areole bud originates in the leaf axil (PO:0009023) of the leaf that becomes the tubercle, but is displaced to the tip through elongation of the tubercle.
Subset
None
Feedback
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Parents of tubercle (PO:0025352)
subject[Reorder by subject] relation[Reorder by relation] object[Reorder by object]
tubercle [is_a relation] is_a  leaf base (PO:0020040)
tubercle [BFO:0000050 relation] BFO:0000050  vascular leaf (PO:0009025)

This term has no children.

PO_GIT
175