Open Access Open Access  Restricted Access Subscription or Fee Access
Cover Image

Frost-acclimation of photosynthesis in overwintering Mediterranean holm oak, grown in Central Europe

Ellen Pflug, Wolfgang Brüggemann
  • Ellen Pflug
    Department of Ecology, Evolution and Diversity, Goethe University Frankfurt, Germany
  • Wolfgang Brüggemann
    Department of Ecology, Evolution and Diversity, Goethe University Frankfurt; Biodiversity and Climate Research Centre, Frankfurt, Germany | w.brueggemann@bio.uni-frankfurt.de

Abstract

As a consequence of global change, forestry in Central Europe has to expect and be prepared for an increase of hot and dry summers in the near future. In two model plantations of the Mediterranean holm oak (Quercus ilex L.) in Central Europe (Rhine-Main basin) we tested its potential as a future forestry tree for drought-threatened stands by studying its overwintering strategy under harsh winter conditions. During prolonged frost periods, chronic photoinhibition was developed, which lasted until the end of the frost period. Nearly all plants survived minimum temperatures of - 16 to -18°C and their photosynthetic apparatus recovered completely during late winter. A detailed study of the temperature dependence of chlorophyll (chl) fluorescence parameters of the OJIP test revealed statistically significant correlations between minimum temperature and maximum quantum yield of primary photochemistry (Fv/Fm), absorption rate/reaction centre (ABS/RC), dissipation rate/reaction centre (DI0/RC) and electron transport rate/reaction centre (ET0/RC) as well as with the deepoxidation state (DES) of the xanthophyll pigments. The DES correlated with Fv/Fm, ABS/RC, DI0/RC and ET0/RC. It is concluded, that from the point of view of the winter hardiness of the photosynthetic apparatus, Q. ilex should be further investigated as a potential future forestry tree also for very dry and warm stands in Central Europe under the scenarios of climate change.

Keywords

chlorophyll fluorescence, OJIP test, xanthophyll cycle

Full Text:

PDF
HTML
Submitted: 2011-01-13 13:40:37
Published: 2012-03-07 15:14:10
Search for citations in Google Scholar
Related articles: Google Scholar
Abstract views:
3356

Views:
PDF
368
HTML
28

Article Metrics

Metrics Loading ...

Metrics powered by PLOS ALM


Copyright (c) 2012 Ellen Pflug, Wolfgang Brüggemann

Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
 
© PAGEPress 2008-2018     -     PAGEPress is a registered trademark property of PAGEPress srl, Italy.     -     VAT: IT02125780185     •     Privacy