Skip to page content
USDA Forest Service
  
Treesearch

Research & Development Treesearch

 
Treesearch Home
About Treesearch
Contact Us
Research & Development
Forest Products Lab
International Institute of Tropical Forestry
Northern
Pacific Northwest
Pacific Southwest
Rocky Mountain
Southern Research Station
Help
 

Science.gov - We Participate


USA.gov  Government Made Easy


Global Forest Information Service

US Forest Service
P.O. Box 96090
Washington, D.C.
20090-6090

(202) 205-8333

You are here: Home / Search / Publication Information
Bookmark and Share

Publication Information

View PDF (253 KB bytes)

Title: The wounding response of dormant barnyardgrass (Echinochloa crus-galli) seeds

Author: Leather, G.R.; Sung, Shi-Jean S.; Hale, M.G.;

Date: 1992

Source: Weed Science 40:200-203.

Publication Series: Miscellaneous Publication

Description: Induction of germination in dormant barnyard grass seeds by wounding was investigated. Previous research indicated that a volatile compound was emitted during imbibition of wounded caryopses.When wounded caryopses were submerged in agar, total germination and speed of germination were stimulated, and the stimulation was dependent upon the concentration of agar.A twofold increase in germination occurred in 1% agar versus water, and a fivefold increase with caryopses placed in 5% agar.When wounded caryopses were imbibed, there was a fourfold increase in respiration over half that of intact caryopses after 1 h.This increased rate of respiration of wounded caryopses continued for 7 h, while there was a gradual increase in respiration of intact caryopses.Carbon dioxide induced intact dormant caryopses to germinate but was not effective in stimulating germination of the seed (spikelet). High levels of abscisic acid found in the hulls of dormant seeds may have prevented the action of carbon dioxide.These results suggest that increased respiration resulting from wounding provides elevated levels of carbon dioxide in the microenvironment of the seed, thus stimulating germination.Removal of the hulls is necessary for germination even in high levels of carbon dioxide.

Publication Notes:

  • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
  • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
  • You may send email to pubrequest@fs.fed.us to request a hard copy of this publication. (Please specify exactly which publication you are requesting and your mailing address.)

XML: View XML

Citation:


Leather, G.R.; Sung, Shi-Jean S.; Hale, M.G. 1992. The wounding response of dormant barnyardgrass (Echinochloa crus-galli) seeds. Weed Science 40:200-203.

 


 [ Get Acrobat ]  Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility

USDA logo which links to the department's national site. Forest Service logo which links to the agency's national site.