Xylem ABA controls the stomatal conductance of field‐grown maize subjected to soil compaction or soil drying

F. TARDIEU*, Jianhua ZHANG, N. KATERJI, O. BETHENOD, S. PALMER, W. J. DAVIES

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

160 Citations (Scopus)

Abstract

Stomatal conductance of individual leaves was measured in a maize field, together with leaf water potential, leaf turgor, xylem ABA concentration and leaf ABA concentration in the same leaves. Stomatal conductance showed a tight relationship with xylem ABA, but not with the current leaf water status or with the concentration of ABA in the bulk leaf. The relationship between stomatal conductance and xylem [ABA] was common for variations in xylem [ABA] linked to the decline with time of the soil water reserve, to simultaneous differences between plants grown on compacted, non‐compacted and irrigated soil, and to plant‐to‐plant variability. Therefore, this relationship is unlikely to be fortuitous or due to synchronous variations. These results suggest that increased concentration of ABA in the xylem sap in response to stress can control the gas exchange of plants under field conditions.

Original languageEnglish
Pages (from-to)193-197
Number of pages5
JournalPlant, Cell and Environment
Volume15
Issue number2
DOIs
Publication statusPublished - Feb 1992

Scopus Subject Areas

  • Physiology
  • Plant Science

User-Defined Keywords

  • ABA
  • leaf water potential
  • maize
  • soil compaction
  • soil water status
  • stomatal conductance

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