Agronomic practices impact argentatin content in guayule (Parthenium argentatum A. Gray)

Gallego, Beatriz; García-Martínez, M. Mercedes; Sánchez‐Gómez, Rosario; Latorre, Guayente; Mendoza, Jorge Hurtado de; Zalacaín, Amaya; Carmona, Manuel

doi:10.1016/j.indcrop.2023.116402

Cited by 2 publications

(4 citation statements)

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“…The leaf resin content from the three guayule accessions studied is similar to the values reported for stem resin content by Gallego et al [20], and is a suitable starting point for its industrial exploitation. Moreover, the resin percentage was consistent with values reported by Dehghanizadeh et al [2] and Rozalén et al [17], who obtained a yield of 9-10% in plants of the same age, and was much greater than the 4% reported in older plants (15-18 years old) by Spano et al [29].…”

Section: Discussionsupporting

confidence: 85%

“…Through comparing the results of argentatins and isoargentatins obtained in leaves with their content in guayule stems [ 19 ], it is evident that the values obtained for the same accessions by Gallego and colleagues are much higher. Nonetheless, if the same accessions are compared with the stems of plants of the same age and under the same conditions [ 20 ], the contents of aA and aB are very similar.…”

Section: Discussionmentioning

confidence: 99%

“…Recently, Gallego et al [ 19 ] identified, for first time, the argentatins and derivates profile in 27 different guayule accessions with LC-CR-MS technology (Orbitrap ® ). There is limited information on argentatin accumulation as their routine quantification is challenging because the structure lacks double bonds and shows a weak chromophoric functionality; however, Gallego et al [ 20 ] recently proposed their quantification using a refractive index detector after their chromatographic separation. The most abundant argentatins in guayule resin correspond to argentatin A (C 30 H 48 O 4 ) and B (C 30 H 48 O 3 ), as representative of the cycloartenol-type triterpenes, and isoargentatin A (C 30 H 48 O 4 ) and isoargentatin B (C 30 H 48 O 3 ), with lanostane-type triterpenes ( Figure 1 ).…”

Section: Introductionmentioning

confidence: 99%

“…The production of argentatins in guayule stems depends on the accession used and the time of harvest, with the spring and summer periods showing maximum accumulation [ 20 ]. To the best of our knowledge, no previous study examined whether argentatins are produced in guayule leaves.…”

Section: Introductionmentioning

confidence: 99%

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

García-Martínez

Gallego

Latorre

et al. 2023

Plants

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

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