Response of dark respiration to temperature in Eriophorum vaginatum from a 30-year-old transplant experiment in Alaska Journal Article


Authors: van de Weg, Martine J.; Fetcher, Ned; Shaver, Gus
Article Title: Response of dark respiration to temperature in Eriophorum vaginatum from a 30-year-old transplant experiment in Alaska
Abstract: Background: In the Arctic region, temperature increases are expected to be greater under anticipated climate change than the global average. Understanding how dark respiration (R-d) of common Arctic plant species acclimates to changes in the environment is therefore important for predicting changes to the Arctic carbon balance. Aims: The aim of this study is to investigate the influence of genotype and growing environment on R-d, the temperature response (Q(10)) of R-d, and foliar N (N-leaf) of the Arctic sedge Eriophorum vaginatum. Methods: We measured R-d, and determined its Q(10) and N-leaf of E. vaginatum populations that were reciprocally transplanted 30 years previously along a latitudinal transect of 370 km in northern Alaska. Results: R-d and Q(10) did not differ among populations (ecotypes) of E. vaginatum, but the local environment had a significant effect on both variables. R-d as well as N-leaf was higher in northern, colder sites, while Q(10) was lower there. Conclusions: R-d in the different populations of E. vaginatum is a very plastic trait and controlled by growing environment, as is N-leaf. The lower Q(10) values in the northern sites were most likely a consequence of substrate inhibition of R-d at higher temperatures.
Keywords: TREE; GROWTH; DEPENDENCE; photosynthesis; RESPIRATION; arctic; SENSITIVITY; PRODUCTIVITY; PLANT; Eriophorum vaginatum; leaf nitrogen; Leaf respiration; Reciprocal transplant; THERMAL-ACCLIMATION; Q10; common garden experiment; POPULUS-DELTOIDES
Journal Title: Plant Ecology Diversity
Volume: 6
Issue: 3-4
ISSN: 1755-0874
Publisher: Taylor & Francis  
Publication Place: ABINGDON; 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
Date Published: 2013
Start Page: 377
End Page: 381
DOI/URL:
Notes: PT: J; TC: 0; SI: SI; UT: WOS:000324904500008