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Short-term responses in maximum quantum yield of PSII (Fv/Fm) to ex situ temperature treatment of populations of bryophytes originating from different sites in Hokkaido, Northern Japan
Statens väg- och transportforskningsinstitut, Miljö, MILJÖ.ORCID iD: 0000-0001-5322-9827
Hokkaido University.
2016 (English)In: PLANTS, E-ISSN 2223-7747, Vol. 5, no 2, p. 455-465Article in journal (Refereed) Published
Abstract [en]

There is limited knowledge available on the thermal acclimation processes for bryophytes, especially when considering variation between populations or sites. This study investigated whether short-term ex situ thermal acclimation of different populations showed patterns of site dependency and whether the maximum quantum yield of PSII (Fv/Fm) could be used as an indicator of adaptation or temperature stress in two bryophyte species: Pleurozium schreberi (Willd. ex Brid.) Mitt. and Racomitrium lanuginosum (Hedw.) Brid.

We sought to test the hypothesis that differences in the ability to acclimate to short-term temperature treatment would be revealed as differences in photosystem II maximum yield (Fv/Fm). Thermal treatments were applied to samples from 12 and 11 populations during 12 or 13 days in growth chambers and comprised: (1) 10/5 °C; (2) 20/10 °C; (3) 25/15 °C; (4) 30/20 °C (12 hours day/night temperature).

In Pleurozium schreberi, there were no significant site-dependent differences before or after the experiment, while site dependencies were clearly shown in Racomitrium lanuginosum throughout the study. Fv/Fm in Pleurozium schreberi decreased at the highest and lowest temperature treatments, which can be interpreted as a stress response, but no similar trends were shown by Racomitrium lanuginosum.

Place, publisher, year, edition, pages
MDPI , 2016. Vol. 5, no 2, p. 455-465
Keywords [en]
Vegetation, Temperature
National Category
Ecology
Research subject
SAB, U Science
Identifiers
URN: urn:nbn:se:hj:diva-40327DOI: 10.3390/plants5020022Scopus ID: 2-s2.0-85005950328OAI: oai:DiVA.org:hj-40327DiVA, id: diva2:1217669
Available from: 2017-01-16 Created: 2018-06-13Bibliographically approved

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Jägerbrand, Annika K.

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