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The influence of substrate pH on carbon translocation in ectomycorrhizal and nonmycorrhizal pine-seedlings

Erland, Susanne LU ; Finlay, R. and Söderström, Bengt LU (1991) In New Phytologist 119(2). p.235-242
Abstract (Swedish)
The effects of changed substrate pH on translocation and partitioning of C-14-labelled plant assimilates were examined in laboratory microcosms containing mycorrhizal (unidentified fungal isolate 'Pink FMT 87:2') and non-mycorrhizal seedlings of Pinus sylvestris L. and Pinus contorta Dougl. ex Loud. The mycorrhizal plants had intact mycelial systems at different developmental stages, and microcosms contained non-sterile peat (pH 3.8) or peat adjusted to different pH values with CaO. In systems with mycorrhizal mycelium which had just started to colonize the peat no significant differences in C-14 assimilation were found, either with respect to substrate pH or mycorrhizal status of the plant. Loss of activity from the mycorrhizal plants was... (More)
The effects of changed substrate pH on translocation and partitioning of C-14-labelled plant assimilates were examined in laboratory microcosms containing mycorrhizal (unidentified fungal isolate 'Pink FMT 87:2') and non-mycorrhizal seedlings of Pinus sylvestris L. and Pinus contorta Dougl. ex Loud. The mycorrhizal plants had intact mycelial systems at different developmental stages, and microcosms contained non-sterile peat (pH 3.8) or peat adjusted to different pH values with CaO. In systems with mycorrhizal mycelium which had just started to colonize the peat no significant differences in C-14 assimilation were found, either with respect to substrate pH or mycorrhizal status of the plant. Loss of activity from the mycorrhizal plants was more rapid, however, probably mainly as a result of increased respiration from the infected root systems. After 8 wk growth in peat at pH 3.8 and 5.2 shoot weights of all seedlings were the same, whereas non-mycorrhizal plants had root systems twice the size of the mycorrhizal ones. In plants with well developed extramatrical mycelia translocation of labelled carbon to the mycelium growing at pH 3.8 was faster than that to mycelium growing at pH 5.2. After 4 d incubation, however, the percentage of the originally supplied carbon present in the mycelium was 5 % regardless of substrate pH. Activity found in the peat surrounding non-mycorrhizal plants rarely exceeded 0.3 %. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
New Phytologist
volume
119
issue
2
pages
235 - 242
publisher
Wiley-Blackwell
ISSN
1469-8137
language
English
LU publication?
yes
id
158240ac-5d75-417a-8b67-d8c8a815bea3 (old id 2226348)
alternative location
http://www.jstor.org/stable/i323565
date added to LUP
2012-01-11 14:24:32
date last changed
2016-04-15 20:05:45
@article{158240ac-5d75-417a-8b67-d8c8a815bea3,
  abstract     = {The effects of changed substrate pH on translocation and partitioning of C-14-labelled plant assimilates were examined in laboratory microcosms containing mycorrhizal (unidentified fungal isolate 'Pink FMT 87:2') and non-mycorrhizal seedlings of Pinus sylvestris L. and Pinus contorta Dougl. ex Loud. The mycorrhizal plants had intact mycelial systems at different developmental stages, and microcosms contained non-sterile peat (pH 3.8) or peat adjusted to different pH values with CaO. In systems with mycorrhizal mycelium which had just started to colonize the peat no significant differences in C-14 assimilation were found, either with respect to substrate pH or mycorrhizal status of the plant. Loss of activity from the mycorrhizal plants was more rapid, however, probably mainly as a result of increased respiration from the infected root systems. After 8 wk growth in peat at pH 3.8 and 5.2 shoot weights of all seedlings were the same, whereas non-mycorrhizal plants had root systems twice the size of the mycorrhizal ones. In plants with well developed extramatrical mycelia translocation of labelled carbon to the mycelium growing at pH 3.8 was faster than that to mycelium growing at pH 5.2. After 4 d incubation, however, the percentage of the originally supplied carbon present in the mycelium was 5 % regardless of substrate pH. Activity found in the peat surrounding non-mycorrhizal plants rarely exceeded 0.3 %.},
  author       = {Erland, Susanne and Finlay, R. and Söderström, Bengt},
  issn         = {1469-8137},
  language     = {eng},
  number       = {2},
  pages        = {235--242},
  publisher    = {Wiley-Blackwell},
  series       = {New Phytologist},
  title        = {The influence of substrate pH on carbon translocation in ectomycorrhizal and nonmycorrhizal pine-seedlings},
  volume       = {119},
  year         = {1991},
}