Hostname: page-component-78c5997874-g7gxr Total loading time: 0 Render date: 2024-11-10T14:15:16.059Z Has data issue: false hasContentIssue false
  • English
  • Français

The effect of abscisic acid on chlorophyll fluorescence in lichens under extreme water regimes

Published online by Cambridge University Press:  01 September 1999

S. DIETZ  and
W. HARTUNG
S. DIETZ
Affiliation:
Julius-von-Sachs-Institut für Biowissenschaften, Lehrstuhl für Botanik I, Julius von Sachs Platz 2, D-97082 Würzburg, Germany
W. HARTUNG
Affiliation:
Julius-von-Sachs-Institut für Biowissenschaften, Lehrstuhl für Botanik I, Julius von Sachs Platz 2, D-97082 Würzburg, Germany
Get access

Abstract

Chlorophyll fluorescence measurements were used to test whether externally applied abscisic acid (ABA) has an effect on the desiccation tolerance of lichens and their sensitivity to constant water saturation. A surplus of ABA did not decrease the time required to regain full photosynthetic capacity after prolonged dry periods. However, an effect of ABA could be observed when lichens were permanently hydrated at moderately high temperatures. Lichens suffered less from constant saturation if ABA was added to the incubation medium. These results suggest a positive effect of ABA on membrane function.

Keywords

abscisic acidABAchlorophyll fluorescenceconstant water saturationdesiccation tolerancelichens
Type
Research Article
Information
The New Phytologist , Volume 143 , Issue 3 , September 1999 , pp. 495 - 501
Copyright
© Trustees of the New Phytologist 1999

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)