Definition of pulvinus in English:
pulvinus
nounPlural pulvini pʌlˈvʌɪnəs-ˈvēnəs
Botany An enlarged section at the base of a leaf stalk in some plants, which is subject to changes of rigidity leading to movements of the leaf or leaflet.
Example sentencesExamples
- Soluble proteins were extracted from gravistimulated pulvini and subjected to protein phosphorylation reactions.
- When the promoter fragment was resolved into smaller portions, further elements could be identified that conferred root, pulvinus and anther expression.
- With the exception of petiole length, pulvinus length and stipule length, the other leaf characteristics overlap between the two species.
- The ion flux occurs within seconds after gravistimulation and establishes pH gradients across roots and maize pulvini.
- Leaves move by means of turgor pressure changes at the pulvinus at the base of each lamina.
Origin
Mid 19th century: from Latin, literally 'cushion'.