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Genetic adaptation to soil acidification: experimental evidence from four grass species

Göransson, Pernilla LU ; Andersson, Stefan LU and Falkengren-Grerup, Ursula LU (2009) In Evolutionary Ecology 23(6). p.963-978
Abstract
Anthropogenic acidification has reduced soil pH and released potentially toxic aluminium (Al) ions in many regions. This investigation examines whether increased acidity has caused genetic adaptation to acidic conditions within the grass species Elymus caninus, Poa nemoralis, Deschampsia cespitosa and D. flexuosa. We sampled tussocks (genets) of each species in two regions of southern Sweden, differing in their exposure to acidifying deposition. The tolerance of the genets was tested in a solution experiment with different pH and Al concentrations. Our data suggest that species found at lower pH field locations have a greater tolerance to low pH and high Al levels than species found on less acidic soils. Analysis of variance showed a... (More)
Anthropogenic acidification has reduced soil pH and released potentially toxic aluminium (Al) ions in many regions. This investigation examines whether increased acidity has caused genetic adaptation to acidic conditions within the grass species Elymus caninus, Poa nemoralis, Deschampsia cespitosa and D. flexuosa. We sampled tussocks (genets) of each species in two regions of southern Sweden, differing in their exposure to acidifying deposition. The tolerance of the genets was tested in a solution experiment with different pH and Al concentrations. Our data suggest that species found at lower pH field locations have a greater tolerance to low pH and high Al levels than species found on less acidic soils. Analysis of variance showed a significant average effect of population and (or) genet in most species; however, we found little evidence of genetic adaptation to acidic conditions at the regional, population and micro-site level. In fact, there was no consistent change in the ranking of populations or genets with varying pH or Al concentration. Based on these results, we hypothesize that phenotypic plasticity rather than genetic adaptation has been favoured as the predominant mechanism to cope with soil acidity in the four grass species. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Stress, Tolerance, Aluminium, pH, Local adaptation, Genetic variation
in
Evolutionary Ecology
volume
23
issue
6
pages
963 - 978
publisher
Springer
external identifiers
  • wos:000271949700010
  • scopus:79951949847
ISSN
1573-8477
DOI
10.1007/s10682-008-9284-y
language
English
LU publication?
yes
id
fcc2c71c-8b08-4ed0-9c93-8716d9bc47a1 (old id 1518431)
date added to LUP
2010-01-13 10:02:37
date last changed
2017-09-10 04:06:12
@article{fcc2c71c-8b08-4ed0-9c93-8716d9bc47a1,
  abstract     = {Anthropogenic acidification has reduced soil pH and released potentially toxic aluminium (Al) ions in many regions. This investigation examines whether increased acidity has caused genetic adaptation to acidic conditions within the grass species Elymus caninus, Poa nemoralis, Deschampsia cespitosa and D. flexuosa. We sampled tussocks (genets) of each species in two regions of southern Sweden, differing in their exposure to acidifying deposition. The tolerance of the genets was tested in a solution experiment with different pH and Al concentrations. Our data suggest that species found at lower pH field locations have a greater tolerance to low pH and high Al levels than species found on less acidic soils. Analysis of variance showed a significant average effect of population and (or) genet in most species; however, we found little evidence of genetic adaptation to acidic conditions at the regional, population and micro-site level. In fact, there was no consistent change in the ranking of populations or genets with varying pH or Al concentration. Based on these results, we hypothesize that phenotypic plasticity rather than genetic adaptation has been favoured as the predominant mechanism to cope with soil acidity in the four grass species.},
  author       = {Göransson, Pernilla and Andersson, Stefan and Falkengren-Grerup, Ursula},
  issn         = {1573-8477},
  keyword      = {Stress,Tolerance,Aluminium,pH,Local adaptation,Genetic variation},
  language     = {eng},
  number       = {6},
  pages        = {963--978},
  publisher    = {Springer},
  series       = {Evolutionary Ecology},
  title        = {Genetic adaptation to soil acidification: experimental evidence from four grass species},
  url          = {http://dx.doi.org/10.1007/s10682-008-9284-y},
  volume       = {23},
  year         = {2009},
}