Javascript verkar inte påslaget? - Vissa delar av Lunds universitets webbplats fungerar inte optimalt utan javascript, kontrollera din webbläsares inställningar.
Du är här

Factors affecting amino-acid-uptake by the ectomycorrhizal fungus Paxillus involutus

Publiceringsår: 1995
Språk: Engelska
Sidor: 1131-1138
Publikation/Tidskrift/Serie: Mycological Research
Volym: 99
Nummer: 9
Dokumenttyp: Artikel i tidskrift
Förlag: Cambridge University Press


Factors affecting amino acid uptake by the ectomycorrhizal fungus Paxillus involutus were investigated using tracer kinetic experiments. Amino acid uptake by P. involutus was dependent on the pH of the incubation medium. Uptake of L-glutamate and L-glutamine had a distinct pH optimum around pH 4.0 and declined sharply between pH 4.5 and 6.4. Uptake of alanine and aspartate was also highest at low pH values (3-4) but declined more slowly with increasing pH. Total uptake of labelled amino acids was unaffected by 0.05 or 0.5 mM ammonium while 5 mM ammonium decreased amino acid uptake. Nitrate or glucose did not significantly affect amino acid uptake but glucose greatly increased the proportion of carbon that was respired. Uptake of the different amino acids decreased by a factor of 4 to 10 with increasing age (1-5 wk) and the proportion of absorbed C-14 that was respired increased with age. Changes in the size of the total amino acid pool were inversely related to those in the rate of uptake and the pool increased steadily with age. The implications of the ability of P. involutus to take up amino acids are discussed.


  • Biological Sciences
  • Aminoacid
  • Metabolism
  • Absorption
  • Respiration
  • pH
  • Glucose
  • Ammonium
  • Mycorrhiza
  • Symbionte
  • Ectomycorrhiza
  • Basidiomycetes
  • Fungi
  • Thallophyta


  • Microbial Ecology
  • ISSN: 1469-8102

Box 117, 221 00 LUND
Telefon 046-222 00 00 (växel)
Telefax 046-222 47 20
lu [at]

Fakturaadress: Box 188, 221 00 LUND
Organisationsnummer: 202100-3211
Om webbplatsen