High guayule rubber production with subsurface drip irrigation in the US desert Southwest

Hunsaker, Douglas J.; El-Shikha, Diaa M; Bronson, K. F.

doi:10.1016/j.agwat.2019.04.016

Cited by 20 publications

(15 citation statements)

References 30 publications

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“…However, given the abundance of terpene biosynthesis-associated transcripts and their almost complete down-regulation suggests that guayule modulates precursors to the rubber biosynthesis pathway when faced with water deficit conditions. This is in agreement with the observation that I 100% plants contained twice the rubber content of those grown at I 25% even though water use efficiency was equivalent (29).…”

Section: Discussionsupporting

confidence: 91%

“…To gain an understanding of what genes might be involved in guayule’s drought response mechanisms, we evaluated the guayule accession AZ-3 grown in plots for 29 months in Maricopa, Arizona having two contrasting irrigation regimes, I 100% and I 25% (Fig. 1a; (29, 30). The I 100% (or control treatment) was completely replenished with irrigation water, meeting measured evaporative soil water losses, while the I 25% received only 25% of the irrigation given to I 100% .…”

Section: Resultsmentioning

confidence: 99%

“…Guayule ( P. argentatum AZ-3) seed was obtained from the USDA-ARS National Plant Germplasm System (NPGS; https://www.ars-grin.gov/) using ID PI 599676. Guayule plants were grown in the field under subsurface drip irrigation at the University of Arizona, Maricopa Agricultural Center in Maricopa, Arizona as described in (29). On the day of final harvest when plants were 29 months-old (March 2015), 10–15 mm diameter-stem segments from each plant were harvested and immediately frozen in liquid nitrogen and then stored at − 80 °C until used.…”

Section: Methodsmentioning

confidence: 99%

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Transcriptomic and evolutionary analysis of the mechanisms by which P. argentatum, a rubber producing perennial, responds to drought

et al. 2019

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BackgroundGuayule (Parthenium argentatum Gray) is a drought tolerant, rubber producing perennial shrub native to northern Mexico and the US Southwest. Hevea brasiliensis, currently the world’s only source of natural rubber, is grown as a monoculture, leaving it vulnerable to both biotic and abiotic stressors. Isolation of rubber from guayule occurs by mechanical harvesting of the entire plant. It has been reported that environmental conditions leading up to harvest have a profound impact on rubber yield. The link between rubber biosynthesis and drought, a common environmental condition in guayule’s native habitat, is currently unclear.ResultsWe took a transcriptomic and comparative genomic approach to determine how drought impacts rubber biosynthesis in guayule. We compared transcriptional profiles of stem tissue, the location of guayule rubber biosynthesis, collected from field-grown plants subjected to water-deficit (drought) and well-watered (control) conditions. Plants subjected to the imposed drought conditions displayed an increase in production of transcripts associated with defense responses and water homeostasis, and a decrease in transcripts associated with rubber biosynthesis. An evolutionary and comparative analysis of stress-response transcripts suggests that more anciently duplicated transcripts shared among the Asteraceae, rather than recently derived duplicates, are contributing to the drought response observed in guayule. In addition, we identified several deeply conserved long non-coding RNAs (lncRNAs) containing microRNA binding motifs. One lncRNA in particular, with origins at the base of Asteraceae, may be regulating the vegetative to reproductive transition observed in water-stressed guayule by acting as a miRNA sponge for miR166.ConclusionsThese data represent the first genomic analyses of how guayule responds to drought like conditions in agricultural production settings. We identified an inverse relationship between stress-responsive transcripts and those associated with precursor pathways to rubber biosynthesis suggesting a physiological trade-off between maintaining homeostasis and plant productivity. We also identify a number of regulators of abiotic responses, including transcription factors and lncRNAs, that are strong candidates for future projects aimed at modulating rubber biosynthesis under water-limiting conditions common to guayules’ native production environment.

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Section: Discussionsupporting

confidence: 91%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Transcriptomic and evolutionary analysis of the mechanisms by which P. argentatum, a rubber producing perennial, responds to drought

et al. 2019

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“…Guayule is adapted to hot desert environments and to sites with different soils (shallow, stony, calcareous and friable) and with relatively low concentrations of nutrients, but it grows best in well-drained soils and cannot tolerate waterlogging [ 16 ]. Some studies about the impact of irrigation have shown that rubber content decreases with irrigation amount, except with subsurface drip irrigation, where rubber yields are increased with irrigation amount, because the biomass increases too [ 29 ]. In the U.S, California, Arizona, New Mexico and Texas are suitable growing areas.…”

Section: Botanical Description Geographical Distribution and Cultmentioning

confidence: 99%

Guayule (Parthenium argentatum A. Gray), a Renewable Resource for Natural Polyisoprene and Resin: Composition, Processes and Applications

et al. 2021

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Natural rubber is an essential material, especially for plane and truck tyres but also for medical gloves. Asia ranks first in the production of natural rubber, of which the Hevea tree is currently the sole source. However, it is anticipated that this source alone will not be able to fulfill the growing demand. Guayule, a shrub native to northern Mexico and southern United States, may also contribute. This plant not only contains polyisoprene, but also resin, a mixture of lipids and terpenoids. This review summarizes various aspects of this plant, from the usage history, botanical description, geographical distribution and cultivation practices, down to polyisoprene and resin biosynthesis including their distribution within the plant and molecular composition. Finally, the main processes yielding dry rubber or latex are depicted, as well as the properties of the various extracts along with economic considerations. The aim is to provide a wide picture of current knowledge available about this promising crop, a good feedstock candidate for a multiple-product biorefinery.

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“…Plant growth and tissue collection Guayule (P. argentatum AZ-3) seed was obtained from the USDA-ARS National Plant Germplasm System (NPGS; https://www.ars-grin.gov/) using ID PI 599676. Guayule plants were grown in the field under subsurface drip irrigation at the University of Arizona, Maricopa Agricultural Center in Maricopa, Arizona as described in (29). On the day of final harvest when plants were 29 months-old (March 2015), 10-15 mm diameter-stem segments from each plant were harvested and immediately frozen in liquid nitrogen and then stored at − 80°C until used.…”

Section: Methodsmentioning

confidence: 99%

Transcriptomic and evolutionary analysis of the mechanisms by which P. argentatum, a rubber producing perennial, responds to drought

Nelson

Ponciano

McMahan

et al. 2019

Preprint

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Background Guayule (Parthenium argentatum Gray) is a drought tolerant, rubber producing perennial shrub native to northern Mexico and the US Southwest. Hevea brasiliensis, currently the world’s only source of natural rubber, is grown as a monoculture, leaving it vulnerable to both biotic and abiotic stressors. Isolation of rubber from guayule occurs by mechanical harvesting of the entire plant. It has been reported that environmental conditions leading up to harvest have a profound impact on rubber yield. The link between rubber biosynthesis and drought, a common environmental condition in guayule’s native habitat, is currently unclear. Results We took a transcriptomic and comparative genomic approach to determine how drought impacts rubber biosynthesis in guayule. We compared transcriptional profiles of stem tissue, the location of guayule rubber biosynthesis, collected from field-grown plants subjected to water-deficit (drought) and well-watered (control) conditions. Plants subjected to the imposed drought conditions displayed an increase in production of transcripts associated with defense responses and water homeostasis, and a decrease in transcripts associated with rubber biosynthesis. An evolutionary and comparative analysis of stress-response transcripts suggests that more anciently duplicated transcripts shared among the Asteraceae, rather than recently derived duplicates, are contributing to the drought response observed in guayule. In addition, we identified several deeply conserved long non-coding RNAs (lncRNAs) containing microRNA binding motifs. One lncRNA in particular, with origins at the base of Asteraceae, may be regulating the vegetative to reproductive transition observed in water-stressed guayule by acting as a miRNA sponge for miR166. Conclusions These data represent the first genomic analyses of how guayule responds to drought like conditions in agricultural production settings. We identified an inverse relationship between stress-responsive transcripts and those associated with precursor pathways to rubber biosynthesis suggesting a physiological trade-off between maintaining homeostasis and plant productivity. We also identify a number of regulators of abiotic responses, including transcription factors and lncRNAs, that are strong candidates for future projects aimed at modulating rubber biosynthesis under water-limiting conditions common to guayules’ native production environment.

show abstract

High guayule rubber production with subsurface drip irrigation in the US desert Southwest

Cited by 20 publications

References 30 publications

Transcriptomic and evolutionary analysis of the mechanisms by which P. argentatum, a rubber producing perennial, responds to drought

Transcriptomic and evolutionary analysis of the mechanisms by which P. argentatum, a rubber producing perennial, responds to drought

Guayule (Parthenium argentatum A. Gray), a Renewable Resource for Natural Polyisoprene and Resin: Composition, Processes and Applications

Transcriptomic and evolutionary analysis of the mechanisms by which P. argentatum, a rubber producing perennial, responds to drought

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