Effects of pre-acclimation temperature on cold tolerance and photoinhibition in forage species
S. Dalmannsdottir , Marcin Rapacz , M. Jorgensen , L. Ostrem , A. Larsen , O. A. Rognli
AbstractThe expected temperature rise in late summer - early autumn can change the conditions for acclimation and affect the winter survival of perennial crops. This is especially relevant in arctic regions where light is limited. Here we studied the effect of pre-acclimation temperature on cold tolerance of timothy (Phleum pratense L.), perennial ryegrass (Lolium perenne L.) and red clover (Trifolium pratense L.), including entries (cultivars/breeding populations) adapted to the northern and southern parts of Norway. A phytotron study was performed in order to test 1) if increasing pre-acclimation temperature decreases cold acclimation ability, delays growth cessation and reduces photosynthetic acclimation to cold,and 2) if northern populations are more affected than southern populations. The results showed that a rise in pre-acclimation temperature decreases cold acclimation and photosynthetic acclimation. However, there were quite large differences between the species. On the other hand, there were no consistent differences in responses of the northern compared with the southern adapted entries.
|Publication size in sheets||0.3|
|Book||Helgadóttir Áslaug, Hopkins Alan (eds.): The Role of Grasslands in a Green Future. Threats and Perspectives in Less Favoured Areas. Proceedings of the 17th Symposium of the European Grassland Federation Akureyri, Iceland 23-26 June 2013, Grassland Science in Europe, vol. 18, 2013, European Grassland Federation, ISBN 978-9979-881-20-9, 581 p.|
|Keywords in English||acclimation, chlorophyll fluorescene, red clover, timpthy, perennial ryegrass|
|Citation count*||3 (2015-10-05)|
|Finansowanie||Norwegia, projekt nr 199664|
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.