pneumatode

English

From Ancient Greek πνεῦμα (pneûma) (breath) and ὁδός (hodós) (pathway)[1]

pneumatode (plural pneumatodes)

(botany, histology) A group of cells with spiral secondary wall thickenings, present in a velamen; acts as an airway for gas exchange for respiration or photosynthesis
(botany, histology) A group of cells presumed to be specialised as an airway for ventilation of particular tissues[2]
- Corley and Tinker:
  The roots of palms are characterised by pneumatodes on both underground and aerial roots. These have been supposed to ventilate the underground roots, but direct physiological evidence for this is lacking.[2]

Jaeger, Edmund Carroll. A source-book of biological names and terms. Publisher=Thomas, Springfield, Ill 1959. isbn=0-398-06179-3
R. H. V. Corley and P. B. H. Tinker. The Oil Palm. Publisher=Wiley 2015 isbn=978-1-118-95330-3. Page 144

单词	pneumatode
释义	pneumatode English Etymology From Ancient Greek πνεῦμα (pneûma) (breath) and ὁδός (hodós) (pathway)[1] Noun pneumatode (plural pneumatodes) (botany, histology) A group of cells with spiral secondary wall thickenings, present in a velamen; acts as an airway for gas exchange for respiration or photosynthesis (botany, histology) A group of cells presumed to be specialised as an airway for ventilation of particular tissues[2] Corley and Tinker: The roots of palms are characterised by pneumatodes on both underground and aerial roots. These have been supposed to ventilate the underground roots, but direct physiological evidence for this is lacking.[2] References Jaeger, Edmund Carroll. A source-book of biological names and terms. Publisher=Thomas, Springfield, Ill 1959. isbn=0-398-06179-3 R. H. V. Corley and P. B. H. Tinker. The Oil Palm. Publisher=Wiley 2015 isbn=978-1-118-95330-3. Page 144
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