Linked Life Data

12721847

Source:http://linkedlifedata.com/resource/pubmed/id/12721847

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
2003-4-30
pubmed:abstractText
With the aim of understanding how some lichens can survive intensive fertilization we investigated two green algal ( Trebouxia) lichens, Hypogymnia physodes (L.) Nyl. and Platismatia glauca (L.) W. Culb., and compared control (Ctr), and intensively fertilized (F) thalli. We measured total N, proteins and amino acids to assess lichen N status. Chlorophyll a indicated photosynthetic capacity and photobiont mass, ergosterol the metabolic demands of the fungus, and chitin the fungal biomass. For carbon status we measured glucose, the photobiont ( Trebouxia) export product ribitol, and the mycobiont-specific carbohydrates arabitol and mannitol. The F-thalli had 2-3 times higher protein and N concentrations, 5-10 times higher chlorophyll a concentrations, while ergosterol and chitin were doubled. The ribitol concentrations were 4-5 times higher in the F-thalli, while the fungal carbohydrates did not increase to the same extent. The amino acid arginine had increased 60-fold. The F-thalli also had a relatively higher N investment in the photobiont in relation to mycobiont tissue compared to the Ctr-thalli, probably resulting in an increased capacity for carbon assimilation, most possibly required for maintaining the higher nutrient status of the F-thalli. Arginine accumulation possibly avoided toxic effects of accumulated NH4+, albeit binding a significant fraction of assimilated carbon.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
May
pubmed:issn
0032-0935
pubmed:author
pubmed:issnType
Print
pubmed:volume
217
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
41-8
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
2003
pubmed:articleTitle
Carbon and nitrogen distribution in the green algal lichens Hypogymnia physodes and Platismatia glauca in relation to nutrient supply.
pubmed:affiliation
Department of Ecology and Environmental Science, Umeå University, 901 87, Umeå, Sweden. Lena.Dahlman@eg.umu.se
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't