Why lose water at night? Disentangling the mystery of nocturnal sap flow, transpiration and stomatal conductance - When, where, who?

M. Zeppel, B. Logan, J. D. Lewis, N. Phillips, D. Tissue

Research output: Contribution to journalConference paperpeer-review

6 Citations (Scopus)

Abstract

Technological advancements have led to abundant evidence of nocturnal sap flow occurring in a range of species and ecosystems under varying microclimatic conditions. Here, we evaluate the physical factors that facilitate night-time water loss and explore potential advantages to this seemingly wasteful process. We discuss the microclimatic variables which affect nocturnal water fluxes, such as temperature, vapour pressure deficit, wind speed, and soil water content, as well as stem refilling, and the impact of phenology, or leaf age on nocturnal water loss. Rising CO2 and temperature affect nocturnal sap flux and stomatal conductance, with some counter-intuitive effects. Additionally, we discuss the possible role of embolism refilling, and recharge of capacitance when stomata are closed.

Original languageEnglish
Pages (from-to)307-312
Number of pages6
JournalActa Horticulturae
Volume991
DOIs
Publication statusPublished - 2013
EventInternational Workshop on Sap Flow (9th : 2013) - Ghent, Belgium
Duration: 4 Jun 20137 Jun 2013

Keywords

  • Capacitance
  • Elevated CO
  • Embolism refilling
  • Eucalyptus
  • Hydraulic redistribution
  • Nocturnal sap flow
  • Nocturnal stomatal conductance

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