Trichome Morphology as an Indicator of High Rubber Bearing Guayule (Parthenium argentatum Gray) Plants in Native Populations

Viscometric method for determining rubber content in guayule (Parthenium argentatum Gray)

“…There have been several techniques developed for determining the rubber content of guayule (Spence and Caldwell, 1933;Traub, 1946; Mehta et al, 1979;Willits et al, 1946; Tysdal and Finlayson, 1981;Visintainer et al, 1981;Banigan et al, 1982). Similarly, there are several laboratories engaged in guayule research each employing one, or a variation of one of the techniques, to evaluate the progress of their breeding efforts, to assess the effectiveness of bioregulators, and to measure the rubber content of plants under various physiological and environmental stimuli.…”

Carbon-13 nuclear magnetic resonance determination of rubber in guayule (Parthenium argentatum)

“…Many of the methods first employ pyrolysis such as the infrared technique described by Osland et al (1978) . The simplest method to date is a photometric one by Traub (1946) and its modification by Mehta et al (1979) .…”