Journal
TREE PHYSIOLOGY
Volume 40, Issue 2, Pages 198-214Publisher
OXFORD UNIV PRESS
DOI: 10.1093/treephys/tpz124
Keywords
Betula pendula (silver birch); common garden; gas exchange; growth; net photosynthesis; provenance
Categories
Funding
- Academy of Finland [284931]
- University of Eastern Finland [931060]
- Finnish Cultural Foundation's North Karelia regional fund [55151977, 55161315, 55172225]
- Finnish Society of Forest Science [201810043]
- Academy of Finland (AKA) [284931, 284931] Funding Source: Academy of Finland (AKA)
Ask authors/readers for more resources
Due to its ubiquity across northern latitudes, silver birch (Betula pendula Roth) is an attractive model species for studying geographical trait variation and acclimation capacity. Six birch provenances from 60 to 67 degrees N across Finland were grown in a common garden and studied for provenance and genotype variation. We looked for differences in height growth, photosynthetic gas exchange and chlorophyll content index (CCI) and compared the gas exchange of early and late leaves on short and long shoots, respectively. The provenances stratified into southern and northern groups. Northern provenances attained less height growth increment and had higher stomatal conductance (g(s)) and lower intrinsic water-use efficiency (WUE, A(net)/g(s)) than southern provenances, whereas net photosynthesis (A(net)) or CCI did not show clear grouping. Short shoot leaves had lower g(s) and higher WUE than long shoot leaves in all provenances, but there was no difference in A(net) between shoot types. The separation of the provenances into two groups according to their physiological responses might reflect the evolutionary history of B. pendula. Latitudinal differences in gas exchange and water use traits can have plausible consequences for global carbon and water fluxes in a warming climate.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available