Irrigation Effects on Volatile Profile and Essential Oil Yield of Guayule During Flowering

Irrigation Effects on Volatile Profile and Essential Oil Yield of Guayule During Flowering

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Inline - Skates - Youth Guayule (Parthenium argentatum A.Gray) has the potential to be an alternative source of rubber if its co-products can be exploited on an industrial scale.Among the co-products that have garnered interest are the essential oils (EOs), which can reach relatively high yields.In the present study, the production and profile of EOs from two guayule accessions, AZ-3 and AZ-5, across different flowering stages (5 months) were analyzed under two irrigation regimes (100% and 50% of crop water evapotranspiration) and compared with control plants that received no additional water, (considered as a water-stress condition).The results showed that the extracted EO yield was consistently higher in the AZ-3 accession than in the AZ-5, especially under water-stress conditions, and that the flowering stage significantly affected the yield irrespective of the accession.

Furthermore, differences in EO composition were observed between accessions, with AZ-3 containing more monoterpenes and AZ-5 containing more sesquiterpenes.The yields obtained underline the Baby Hoodies economic potential of guayule EO production, especially under water-stress and flowering conditions, and position it favorably against other aromatic plants.These results provide valuable insights for optimizing guayule cultivation to increase EO yields, with both economic and environmental benefits.