Skip to main content

Nitrogenous Compounds in the Xylem Sap of Ulmus americana: Seasonal Variations in Relation to Dutch Elm Disease Susceptibility

Buy Article:

$29.50 plus tax (Refund Policy)

Amino acid concentrations in the xylem sap of Ulmus americana L. decreased gradually from early spring to summer. Twenty amino acids, ammonia, -amino-n-butyric acid, ethanol-amine, and -alanine were always present. Asparagine + glutamine constituted the most abundant organic nitrogenous components in the xylem sap during June when elms in Wisconsin are most susceptible to Dutch elm disease. Proline was present only in the sap samples collected during May, and disappeared in early June with the onset of susceptibility to Dutch elm disease. Ammonia was present in high concentration; and ornithine, lysine, histidine, ethanolamine, arginine, glycine, methionine, isoleucine, leucine, tyrosine, and phenylalanine were present in measurable amounts during May and early June, but all declined to small amounts in later months.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
No Data/Media
No Metrics

Keywords: Amino acids; Ceratocystis ulmi

Document Type: Journal Article

Affiliations: Associate Professor of Plant Pathology and Forestry, University of Wisconsin, Madison

Publication date: 1969-09-01

More about this publication?
  • Forest Science is a peer-reviewed journal publishing fundamental and applied research that explores all aspects of natural and social sciences as they apply to the function and management of the forested ecosystems of the world. Topics include silviculture, forest management, biometrics, economics, entomology & pathology, fire & fuels management, forest ecology, genetics & tree improvement, geospatial technologies, harvesting & utilization, landscape ecology, operations research, forest policy, physiology, recreation, social sciences, soils & hydrology, and wildlife management.
    Forest Science is published bimonthly in February, April, June, August, October, and December.

    2016 Impact Factor: 1.782 (Rank 17/64 in forestry)

    Average time from submission to first decision: 62.5 days*
    June 1, 2016 to Feb. 28, 2017

    Also published by SAF:
    Journal of Forestry
    Other SAF Publications
  • Submit a Paper
  • Membership Information
  • Author Guidelines
  • Podcasts
  • Ingenta Connect is not responsible for the content or availability of external websites
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
X
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more