Interactive effects of elevated ozone and temperature on carbon allocation of silver birch (Betula pendula) genotypes in an open-air field exposure

Tree Physiology
Anne KasurinenElina Oksanen

Abstract

In the present experiment, the single and combined effects of elevated temperature and ozone (O(3)) on four silver birch genotypes (gt12, gt14, gt15 and gt25) were studied in an open-air field exposure design. Above- and below-ground biomass accumulation, stem growth and soil respiration were measured in 2008. In addition, a (13)C-labelling experiment was conducted with gt15 trees. After the second exposure season, elevated temperature increased silver birch above- and below-ground growth and soil respiration rates. However, some of these variables showed that the temperature effect was modified by tree genotype and prevailing O(3) level. For instance, in gt14 soil respiration was increased in elevated temperature alone (T) and in elevated O(3) and elevated temperature in combination (O(3) + T) treatments, but in other genotypes O(3) either partly (gt12) or totally nullified (gt25) temperature effects on soil respiration, or acted synergistically with temperature (gt15). Before leaf abscission, all genotypes had the largest leaf biomass in T and O(3) + T treatments, whereas at the end of the season temperature effects on leaf biomass depended on the prevailing O(3) level. Temperature increase thus delayed and O(3) accelerated l...Continue Reading

References

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Citations

Sep 29, 2015·Environmental Pollution·Gina MillsBill Davies
Apr 12, 2014·The New Phytologist·Nobuhiro SuzukiRon Mittler
Feb 25, 2017·Frontiers in Plant Science·Kamlesh K MeenaParamjit S Minhas
Dec 29, 2019·Scientific Reports·Laura DuqueIngolf Steffan-Dewenter
Nov 22, 2019·Tree Physiology·Katarína MerganičováChristopher P O Reyer
Dec 31, 2016·Ecology and Evolution·Jürg FuhrerMike R Ashmore
Jul 3, 2021·International Journal of Molecular Sciences·Khalid AnwarAshwani Pareek

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