Ectomycorrhizas as Nutrient Absorbing Organs

  • Harley J
  • 4

    Readers

    Mendeley users who have this article in their library.
  • 37

    Citations

    Citations of this article.

Abstract

Early work on ectomycorrhizas indicated that they were probably adapted to efficient nutrient absorption. The use of excised mycorrhizas has allowed study of their properties as absorbing organs. The factors affecting their rates of nutrient uptake are similar to those of other absorbing organs but their rates are often greater. On absorption the nutrient is primarily accumulated in the fungal layer but may be mobilized later by reactions under metabolic control. Phosphate is accumulated in particularly large quantities as polyphosphate, which probably explains the linear relations of phosphate absorption and oxygen uptake in certain conditions. Hyphal connections between the fungal sheath and the substrate are variable, and this poses problems about absorption of ions of low mobility, and about the function of surface phosphatases. The fungal sheath is dependent on the host for carbohydrate and the drain on it may be considerable.

Author-supplied keywords

  • Absorption
  • Chlorides
  • Chlorides: metabolism
  • Ecology
  • Fungi
  • Fungi: anatomy & histology
  • Fungi: enzymology
  • Fungi: metabolism
  • Hydrolases
  • Hydrolases: metabolism
  • Nitrates
  • Nitrates: metabolism
  • Oxygen Consumption
  • Phosphates
  • Phosphates: metabolism
  • Phosphoric Monoester Hydrolases
  • Phosphoric Monoester Hydrolases: metabolism
  • Potassium
  • Potassium Cyanide
  • Potassium Cyanide: pharmacology
  • Potassium: metabolism
  • Sodium
  • Sodium: metabolism
  • Soil Microbiology
  • Trees

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document

Get full text

Authors

  • J L Harley

Cite this document

Choose a citation style from the tabs below

Save time finding and organizing research with Mendeley

Sign up for free