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A comparison of the physiology, anatomy and ribosomal DNA in alpine and subalpine populations of the lichen Nephroma arcticum- the effects of an eight-year transplant experiment

Sonesson, Mats LU ; Sveinbjornsson, Bjartmar; Tehler, Anders and Carlsson, Bengt A. (2007) In Bryologist 110(2). p.244-253
Abstract
Thalli of Nephroma arcticum were transplanted between and within a high-elevation alpine heath (1100 m) and a low-elevation subalpine mountain birch forest (380 m) in northern Swedish Lapland and harvested after eight years. Statistically significant differences (P < 0.05) were found between control samples for dark respiration rates, photon use efficiencies (apparent quantum yields) and light compensation points (all were higher in the high-altitude population). The following traits were significantly affected by transplanting: (1) epicortex thickness, (2) upper cortex thickness in the low-altitude population, (3) maximum photosynthetic rates, (4) dark respiration rates and (5) light compensation point. Of these malleable traits, all... (More)
Thalli of Nephroma arcticum were transplanted between and within a high-elevation alpine heath (1100 m) and a low-elevation subalpine mountain birch forest (380 m) in northern Swedish Lapland and harvested after eight years. Statistically significant differences (P < 0.05) were found between control samples for dark respiration rates, photon use efficiencies (apparent quantum yields) and light compensation points (all were higher in the high-altitude population). The following traits were significantly affected by transplanting: (1) epicortex thickness, (2) upper cortex thickness in the low-altitude population, (3) maximum photosynthetic rates, (4) dark respiration rates and (5) light compensation point. Of these malleable traits, all reduce the differences between the controls although there seems to be over-compensation in maximum net photosynthesis and under-compensation in dark respiration rate of the low-altitude population. Conservative traits, i.e., those that did not change significantly with transplantation were: (1) thallus thickness, (2) algal layer thickness, (3) algal cell diameter and (4) light saturation level. Small, yet significant differences in anatomy and physiology suggest that an ecotypic differentiation was established although the two internal transcribed DNA spacers ITS 1 and ITS 2 showed no corresponding variation between the populations. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
ITS, ribosomal DNA, anatomy, Nephroma arcticum, respiration, photosynthesis
in
Bryologist
volume
110
issue
2
pages
244 - 253
publisher
AMER BRYOLOGICAL LICHENOLOGICAL SOCIETY INC
external identifiers
  • wos:000246254300005
  • scopus:34248587161
ISSN
1938-4378
DOI
10.1639/0007-2745(2007)110[244:ACOTPA]2.0.CO;2
language
English
LU publication?
yes
id
93924d89-6e81-42a5-9888-1bed9891c508 (old id 662762)
date added to LUP
2007-12-19 09:26:06
date last changed
2017-01-01 07:03:31
@article{93924d89-6e81-42a5-9888-1bed9891c508,
  abstract     = {Thalli of Nephroma arcticum were transplanted between and within a high-elevation alpine heath (1100 m) and a low-elevation subalpine mountain birch forest (380 m) in northern Swedish Lapland and harvested after eight years. Statistically significant differences (P &lt; 0.05) were found between control samples for dark respiration rates, photon use efficiencies (apparent quantum yields) and light compensation points (all were higher in the high-altitude population). The following traits were significantly affected by transplanting: (1) epicortex thickness, (2) upper cortex thickness in the low-altitude population, (3) maximum photosynthetic rates, (4) dark respiration rates and (5) light compensation point. Of these malleable traits, all reduce the differences between the controls although there seems to be over-compensation in maximum net photosynthesis and under-compensation in dark respiration rate of the low-altitude population. Conservative traits, i.e., those that did not change significantly with transplantation were: (1) thallus thickness, (2) algal layer thickness, (3) algal cell diameter and (4) light saturation level. Small, yet significant differences in anatomy and physiology suggest that an ecotypic differentiation was established although the two internal transcribed DNA spacers ITS 1 and ITS 2 showed no corresponding variation between the populations.},
  author       = {Sonesson, Mats and Sveinbjornsson, Bjartmar and Tehler, Anders and Carlsson, Bengt A.},
  issn         = {1938-4378},
  keyword      = {ITS,ribosomal DNA,anatomy,Nephroma arcticum,respiration,photosynthesis},
  language     = {eng},
  number       = {2},
  pages        = {244--253},
  publisher    = {AMER BRYOLOGICAL LICHENOLOGICAL SOCIETY INC},
  series       = {Bryologist},
  title        = {A comparison of the physiology, anatomy and ribosomal DNA in alpine and subalpine populations of the lichen Nephroma arcticum- the effects of an eight-year transplant experiment},
  url          = {http://dx.doi.org/10.1639/0007-2745(2007)110[244:ACOTPA]2.0.CO;2},
  volume       = {110},
  year         = {2007},
}