Argentatin Content in Guayule Leaves (Parthenium argentatum A. Gray)

Approximately one-third of the waste biomass from cultivation guayule (Parthenium argentatum A. Gray) for natural rubber production is leaf tissue; however, whether it can be valorized not known. Guayulins and argentatins are potential high-value products that recovered resin during rubber/latex processing. Argentatins highly abundant in stem resin; unlike guayulins, their occurrence leaves has been investigated. The present study determined content isoargentatins A B a pure accession (R1040) two hybrids (CAL-1 AZ-2) under conditions irrigation non-irrigation. was ~10%, which provides suitable starting point economic exploitation. highest occurred plants irrigation, with yields 4.2 3.6 kg ha−1 R1040 AZ-2, respectively. had percentage greatest total argentatin (24.5 g kg−1 dried leaf), principally due to abundance Contrastingly, CAL-1 consistently showed lowest based on weight (0.6 ha−1). substantial suggests future