Skip to main content

Uptake and Transport of Paraquat in Slash Pine

Buy Article:

$29.50 plus tax (Refund Policy)

Uptake and movement of paraquat (1,1'dimethyl-4,4'bipyridylium dichloride) into the transpiration stream of 25-year-old slash pine (Pinus elliottii Engelm.) trees was followed using methyl-14C-paraquat (10Ci/tree) applied in 8 and 3 percent solutions with commercial paraquat. Initial uptake from saturated cellulose pads into xylem was rapid, whereas upward axial movement in outer rings of xylem was 100-fold less than the established velocity of water transport in pines. Velocity of paraquat-11C movement was approximately 30 cm/day vertically and 0.5 cm/day radially along negative pressure gradients in xylem. Recovery of 14C-paraquat by sulphuric acid extraction of xylem samples above the site of application, followed by thin layer chromatography of partially purified extracts, indicated that much radioactivity was still in the form of methyl-11C-paraquat. The physiological significance of paraquat's strong affinity for cellulose, resulting in its slow movement both vertically and horizontally, is briefly discussed as it relates to increased oleoresin synthesis and lightwood formation. Forest Sci. 21:359-364.
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: Pinus elliottii; Xylem transport; herbicide translocation; lightwood; oleoresin formation; resin soaking

Document Type: Journal Article

Affiliations: Department of Forestry, Clemson University, Clemson, S. C.

Publication date: 1975-12-01

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
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