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Extensive physiological integration in Carex arenaria and Carex disticha in relation to potassium and water availability

D'Hertefeldt, Tina LU and Falkengren-Grerup, Ursula LU (2002) In New Phytologist 156(3). p.469-477
Abstract
Physiological integration between ramets is beneficial when acquiring heterogeneously distributed resources, and is hypothesized to occur when the benefits of resource sharing outweigh the costs. Our aim was to investigate if resource availability affected physiological integration in Carex arenaria and Carex disticha. Ramet systems were grown in high potassium and high water (K+ W+), high K and low water (K+ W-), or low K and high water (K- W+) for 1 month. Thereafter, water and K transport were traced with erythrosin and rubidium, respectively. Carex arenaria and C. disticha transported erythrosin over seven ramet generations and rubidium throughout the whole ramet system, but C. arenaria exported 20% more rubidium from the labelled... (More)
Physiological integration between ramets is beneficial when acquiring heterogeneously distributed resources, and is hypothesized to occur when the benefits of resource sharing outweigh the costs. Our aim was to investigate if resource availability affected physiological integration in Carex arenaria and Carex disticha. Ramet systems were grown in high potassium and high water (K+ W+), high K and low water (K+ W-), or low K and high water (K- W+) for 1 month. Thereafter, water and K transport were traced with erythrosin and rubidium, respectively. Carex arenaria and C. disticha transported erythrosin over seven ramet generations and rubidium throughout the whole ramet system, but C. arenaria exported 20% more rubidium from the labelled shoot than C. disticha. A detailed analysis of subset of plants suggested that C. disticha in low K abundance shared more rubidium than in high K abundance, and that C. arenaria ramets in both K+ W- and K- W+ shared more resources than K+ W+ ramets. We demonstrated long-distance resource transport for K and water in C. arenaria and C. disticha. The distance of integration was not affected by resource availability in C. arenaria or C. disticha, but local concentrations of K showed marked and contrasting responses to nutrient and water treatment in both species. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
tracers, extensive integrators, rubidium, potassium, erythrosin, clonal plants
in
New Phytologist
volume
156
issue
3
pages
469 - 477
publisher
Wiley-Blackwell
external identifiers
  • wos:000179411800015
  • scopus:0036898357
ISSN
1469-8137
DOI
10.1046/j.1469-8137.2002.00529.x
language
English
LU publication?
yes
id
a90fde92-eca0-4f94-b525-b1ae1ec7a525 (old id 147144)
date added to LUP
2007-07-02 09:13:20
date last changed
2017-01-01 05:04:05
@article{a90fde92-eca0-4f94-b525-b1ae1ec7a525,
  abstract     = {Physiological integration between ramets is beneficial when acquiring heterogeneously distributed resources, and is hypothesized to occur when the benefits of resource sharing outweigh the costs. Our aim was to investigate if resource availability affected physiological integration in Carex arenaria and Carex disticha. Ramet systems were grown in high potassium and high water (K+ W+), high K and low water (K+ W-), or low K and high water (K- W+) for 1 month. Thereafter, water and K transport were traced with erythrosin and rubidium, respectively. Carex arenaria and C. disticha transported erythrosin over seven ramet generations and rubidium throughout the whole ramet system, but C. arenaria exported 20% more rubidium from the labelled shoot than C. disticha. A detailed analysis of subset of plants suggested that C. disticha in low K abundance shared more rubidium than in high K abundance, and that C. arenaria ramets in both K+ W- and K- W+ shared more resources than K+ W+ ramets. We demonstrated long-distance resource transport for K and water in C. arenaria and C. disticha. The distance of integration was not affected by resource availability in C. arenaria or C. disticha, but local concentrations of K showed marked and contrasting responses to nutrient and water treatment in both species.},
  author       = {D'Hertefeldt, Tina and Falkengren-Grerup, Ursula},
  issn         = {1469-8137},
  keyword      = {tracers,extensive integrators,rubidium,potassium,erythrosin,clonal plants},
  language     = {eng},
  number       = {3},
  pages        = {469--477},
  publisher    = {Wiley-Blackwell},
  series       = {New Phytologist},
  title        = {Extensive physiological integration in Carex arenaria and Carex disticha in relation to potassium and water availability},
  url          = {http://dx.doi.org/10.1046/j.1469-8137.2002.00529.x},
  volume       = {156},
  year         = {2002},
}