title: Variation in waterlogging-triggered stomatal behavior contributes to changes in the cold acclimation process in prehardened Lolium perenne and Festuca pratensis.
abstract: According to predicted changes in climate, waterlogging events may occur more frequently in the future during autumn and winter at high latitudes of the Northern Hemisphere. If excess soil water coincides with the process of cold acclimation for plants, winter survival may potentially be affected. The effects of waterlogging during cold acclimation on stomatal aperture, relative water content, photochemical activity of photosystem II, freezing tolerance and plant regrowth after freezing were compared for two prehardened overwintering forage grasses, Lolium perenne and Festuca pratensis. The experiment was performed to test the hypothesis that changes in photochemical activity initiated by waterlogging-triggered modifications in the stomatal aperture contribute to changes in freezing tolerance. Principal component analysis showed that waterlogging activated different adaptive strategies in the two species studied. The increased freezing tolerance of F. pratensis was associated with increased photochemical activity connected with stomatal opening, whereas freezing tolerance of L. perenne was associated with a decrease in stomatal aperture. In conclusion, waterlogging-triggered stomatal behavior contributed to the efficiency of the cold acclimation process in L. perenne and F. pratensis.
authors: University of Agriculture in Kraków, Faculty of Agriculture and Economics, Department of Plant Physiology, Podłużna 3, 30-239 Kraków, Poland. Electronic address: b.jurczyk@ur.krakow.pl.
authors: Barbara
authors: B
authors: Jurczyk
authors: University of Agriculture in Kraków, Faculty of Agriculture and Economics, Department of Plant Physiology, Podłużna 3, 30-239 Kraków, Poland.
authors: Ewa
authors: E
authors: Pociecha
authors: The Franciszek Górski Institute of Plant Physiology, Polish Academy of Sciences, Niezapominajek 21, 30-239 Kraków, Poland.
authors: Franciszek
authors: F
authors: Janowiak
authors: University of Agriculture in Kraków, Faculty of Agriculture and Economics, Department of Plant Physiology, Podłużna 3, 30-239 Kraków, Poland.
authors: Dawid
authors: D
authors: Kabała
authors: University of Agriculture in Kraków, Faculty of Agriculture and Economics, Department of Plant Physiology, Podłużna 3, 30-239 Kraków, Poland.
authors: Marcin
authors: M
authors: Rapacz
mesh_terms: D000064:Acclimatization / Q000235:genetics / Q000502:physiology*; D057231:Climate Change; D003081:Cold Climate; D031751:Festuca / Q000235:genetics / Q000254:growth & development / Q000502:physiology*; D055868:Floods; D005615:Freezing; D005838:Genotype; D008129:Lolium / Q000235:genetics / Q000254:growth & development / Q000502:physiology*; D008954:Models, Biological; D045332:Photosystem II Protein Complex / Q000378:metabolism; D054046:Plant Stomata / Q000502:physiology*; D025341:Principal Component Analysis; D012621:Seasons; D013045:Species Specificity; D014867:Water / Q000378:metabolism
chemical_list: D045332:Photosystem II Protein Complex; D014867:Water
keywords: Chlorophyll fluorescence; Cold acclimation; Freezing tolerance; Prehardening; Stomatal aperture; Waterlogging