One of the mysteries of the English language finally explained.
An enlarged section at the base of a leaf stalk in some plants that is subject to changes of turgor, leading to movements of the leaf or leaflet.
- ‘Leaves move by means of turgor pressure changes at the pulvinus at the base of each lamina.’
- ‘When the promoter fragment was resolved into smaller portions, further elements could be identified that conferred root, pulvinus and anther expression.’
- ‘Soluble proteins were extracted from gravistimulated pulvini and subjected to protein phosphorylation reactions.’
- ‘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.’
Mid 19th century: from Latin, literally ‘cushion’.
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