Effects of aqueous leaf extracts of creosotebush, <i>larrea tridentata</i>, on germination of seven species of sympatric plants

TitleEffects of aqueous leaf extracts of creosotebush, larrea tridentata, on germination of seven species of sympatric plants
Publication TypeConference Paper
Year of Publication1999
AuthorsHu D., Fredrickson E.L., Hyder P.W., Estell R.E.
Conference Name5th Symposium on Resources of the Chihuahuan Desert Region: US and Mexico
Date PublishedOctober 7-8, 199
Conference LocationAlpine, TX
ARIS Log Number129599
AbstractWe exposed seven species of plant seeds to aqueous extracts of Creosotebush leaves: Black Grama, Bouteloua eriopoda; Sideoats Grama, B. curtipendula; Burrograss, Scleropogon brevifolous; Fluffgrass, Dasyochloa pulchella; Bush Muhly, Muhlenbergia porteri; Tarbush, Fluorensia cernua; and, Creosotebush, Larrea tridentata. We also included lettuce as a standard bioassay for allelopathic effects. Extract concentrations varied from 0 to 50 times th concentration found in stemflow during a typical summer rainfall event. Germination and radicle elongation of plant species closely associated with Creosotebush were affected differently than those whose populations are reduced with increasing Creosotebush density.