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Exudation of low molecular weight organic acids by germinating seeds of two edaphic ecotypes of Silene nutans L.

Bruun, Hans Henrik LU ; Van Rossum, Fabienne and Ström, Lena LU (2001) In Acta Oecologica 22(5-6). p.285-291
Abstract
Two parapatric ecotypes of Silene nutans, exhibiting distinct allozyme patterns, morphology and autecology were investigated for differences in exudation of low molecular weight organic acids from germinating seeds, and for differences in seed phosphorus content. The calcicolous ecotype is restricted to calcareous soils, and the silicicolous one predominantly occurs on acid soils, and sometimes, although less frequently, on neutral to alkaline soils. No clear difference was found between ecotypes. However, within the silicicolous ecotype seed samples showed marked differences in exudation pattern and seed phosphorus content depending on origin along the soil acidity gradient. Seeds of low-pH origin exuded more dicarboxylic acids (malic +... (More)
Two parapatric ecotypes of Silene nutans, exhibiting distinct allozyme patterns, morphology and autecology were investigated for differences in exudation of low molecular weight organic acids from germinating seeds, and for differences in seed phosphorus content. The calcicolous ecotype is restricted to calcareous soils, and the silicicolous one predominantly occurs on acid soils, and sometimes, although less frequently, on neutral to alkaline soils. No clear difference was found between ecotypes. However, within the silicicolous ecotype seed samples showed marked differences in exudation pattern and seed phosphorus content depending on origin along the soil acidity gradient. Seeds of low-pH origin exuded more dicarboxylic acids (malic + succinic acid, oxalic acid) and had a lower phosphorus content than seeds of high pH origin. The exudation of dicarboxylic acids from seeds of low pH origin is probably an adaptation to adverse conditions (aluminium toxicity) on acid soils. The pattern is similar to that found among different cultivars of wheat. It is contrasted to the pattern found on comparison of a suite of calcifugous and calcicolous species, where exudation of di- and tricarboxylic acids is associated with solubilisation of recalcitrantly bound phosphorus and iron in calcareous soils. (C) 2001 Editions scientifiques et medicales Elsevier SAS. (Less)
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author
organization
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type
Contribution to journal
publication status
published
subject
keywords
ecotype, root exudation, Silene nutans, soil acidity, seed phosphorus content
in
Acta Oecologica
volume
22
issue
5-6
pages
285 - 291
publisher
Elsevier
external identifiers
  • scopus:0035658925
ISSN
1146-609X
DOI
10.1016/S1146-609X(01)01126-2
language
English
LU publication?
yes
id
38dae792-a69a-40bc-ac22-3f49ea61bbd7 (old id 147222)
date added to LUP
2007-07-02 08:54:08
date last changed
2018-06-03 04:18:43
@article{38dae792-a69a-40bc-ac22-3f49ea61bbd7,
  abstract     = {Two parapatric ecotypes of Silene nutans, exhibiting distinct allozyme patterns, morphology and autecology were investigated for differences in exudation of low molecular weight organic acids from germinating seeds, and for differences in seed phosphorus content. The calcicolous ecotype is restricted to calcareous soils, and the silicicolous one predominantly occurs on acid soils, and sometimes, although less frequently, on neutral to alkaline soils. No clear difference was found between ecotypes. However, within the silicicolous ecotype seed samples showed marked differences in exudation pattern and seed phosphorus content depending on origin along the soil acidity gradient. Seeds of low-pH origin exuded more dicarboxylic acids (malic + succinic acid, oxalic acid) and had a lower phosphorus content than seeds of high pH origin. The exudation of dicarboxylic acids from seeds of low pH origin is probably an adaptation to adverse conditions (aluminium toxicity) on acid soils. The pattern is similar to that found among different cultivars of wheat. It is contrasted to the pattern found on comparison of a suite of calcifugous and calcicolous species, where exudation of di- and tricarboxylic acids is associated with solubilisation of recalcitrantly bound phosphorus and iron in calcareous soils. (C) 2001 Editions scientifiques et medicales Elsevier SAS.},
  author       = {Bruun, Hans Henrik and Van Rossum, Fabienne and Ström, Lena},
  issn         = {1146-609X},
  keyword      = {ecotype,root exudation,Silene nutans,soil acidity,seed phosphorus content},
  language     = {eng},
  number       = {5-6},
  pages        = {285--291},
  publisher    = {Elsevier},
  series       = {Acta Oecologica},
  title        = {Exudation of low molecular weight organic acids by germinating seeds of two edaphic ecotypes of Silene nutans L.},
  url          = {http://dx.doi.org/10.1016/S1146-609X(01)01126-2},
  volume       = {22},
  year         = {2001},
}