Definition of transpiration stream in English:

transpiration stream

noun

Botany
  • The flow of water through a plant, from the roots to the leaves, via the xylem vessels.

    • ‘Mass flow of solution towards the root in the transpiration stream tends to compress the zones of oxygenation and nitrification and extend the zone of depletion.’
    • ‘Na+ is transported to shoots in the rapidly moving transpiration stream in the xylem, but can only be returned to roots via the phloem.’
    • ‘This scenario implies that water will be taken up by the xylem parenchyma whenever the water potential in the transpiration stream is high.’
    • ‘Xylem flow carries the transpiration stream and is normally entirely acropetal.’
    • ‘The transpiration stream through the xylem transports cytokinins, as well as ABA, from the root to the shoot.’

Pronunciation:

transpiration stream

/ˌtran(t)spəˈrāSHən ˌstrēm/