Improved guayule lines outperform old lines in south-east Queensland

Dissanayake, P.; George, D. L.; Gupta, Mohit

doi:10.1016/j.indcrop.2006.09.002

Cited by 10 publications

(5 citation statements)

References 16 publications

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“…The amount of rubber that accumulated under winter‐like conditions, i.e. 9.3% of the stem dry weight or about 4.5% of the total plant dry weight, is higher than the amounts generally reported in the literature for 15‐month‐old plants (Appleton and van Staden 1989, Coffelt et al 2005, Dissanayake et al 2007, Veatch‐Blohm et al 2007). The amount of resin that accumulated in the stems was remarkably similar under the three growth conditions, indicating that resin accumulation in the stem was unaffected by the physiological state of the plant.…”

Section: Discussioncontrasting

confidence: 59%

“…The amount of resin that accumulated in the stems was remarkably similar under the three growth conditions, indicating that resin accumulation in the stem was unaffected by the physiological state of the plant. A lack of response of resin levels to environmental conditions has been reported previously (Bonner 1943, Dissanayake et al 2007, Veatch-Blohm et al 2007) and indicates that resin accumulation is regulated differently from the accumulation of rubber and the production of volatile terpenoid compounds (see below).…”

Section: Growth Conditionmentioning

confidence: 78%

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Photosynthesis and assimilate partitioning between carbohydrates and isoprenoid products in vegetatively active and dormant guayule: physiological and environmental constraints on rubber accumulation in a semiarid shrub

Salvucci

Barta

Byers

et al. 2010

Physiologia Plantarum

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The stems and roots of the semiarid shrub guayule, Parthenium argentatum, contain a significant amount of natural rubber. Rubber accumulates in guayule when plants are vegetatively and reproductively dormant, complicating the relationship between growth/reproduction and product synthesis. To evaluate the factors regulating the partitioning of carbon to rubber, carbon assimilation and partitioning were measured in guayule plants that were grown under simulated summer- and winter-like conditions and under winter-like conditions with CO(2) enrichment. These conditions were used to induce vegetatively active and dormant states and to increase the source strength of vegetatively dormant plants, respectively. Rates of CO(2) assimilation, measured under growth temperatures and CO(2) , were similar for plants grown under summer- and winter-like conditions, but were higher with elevated CO(2) . After 5 months, plants grown under summer-like conditions had the greatest aboveground biomass, but the lowest levels of non-structural carbohydrates and rubber. In contrast, the amount of resin in the stems was similar under all growth conditions. Emission of biogenic volatile compounds was more than three-fold higher in plants grown under summer- compared with winter-like conditions. Taken together, the results show that guayule plants maintain a high rate of photosynthesis and accumulate non-structural carbohydrates and rubber in the vegetatively dormant state, but emit volatile compounds at a lower rate when compared with more vegetatively active plants. Enrichment with CO(2) in the vegetatively dormant state increased carbohydrate content but not the amount of rubber, suggesting that partitioning of assimilate to rubber is limited by sink strength in guayule.

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Section: Discussioncontrasting

confidence: 59%

Section: Growth Conditionmentioning

confidence: 78%

Photosynthesis and assimilate partitioning between carbohydrates and isoprenoid products in vegetatively active and dormant guayule: physiological and environmental constraints on rubber accumulation in a semiarid shrub

Salvucci

Barta

Byers

et al. 2010

Physiologia Plantarum

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“…Countries near the Mediterranean Sea, like France, Spain, Italy, Greece, Turkey, Israel and Morocco are suitable too [ 30 ]. Several other countries have also conducted guayule crop trials such as Argentina [ 31 ], Australia [ 32 ] and South Africa [ 33 ].…”

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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“…On the contrary, main stem diameters for AZ-1, AZ-2 and 11591 lines in Sardinia were twice as larger as in South Africa. The comparisons for biometric traits with Australian results [27] showed quite similar plant height values for AZ-1 and 11591, whereas higher values for AZ-2 leading to taller plants than those recorded in southern Sardinia. However, in that Sardinian site AZ-2 and 11591 did not significantly differ for plant height.…”

Section: Discussionmentioning

confidence: 61%

“…Dissanayake et al [27] also evaluated the same accessions in two distinct Australian sites and found higher rubber and resin contents for AZ-1 and AZ-2 in the drier site, but similar yields in both sites. They found very lower rubber and resin yields for 11591 in the drier site, even though rubber and resin contents were higher.…”

Section: Discussionmentioning

confidence: 94%

Adaptation, Biometric Traits and Performances of Guayule Lines Grown in Two Mediterranean Environments

et al. 2020

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The perennial shrub guayule (Parthenium argentatum A. Gray) has gained interest as a potential source of natural and hypoallergenic rubber in Southern Europe. Although, native to northern Mexico, it is suited to semi-arid and Mediterranean environments. A research study was conducted in Sardinia (Italy) to evaluate adaptation and biometric traits of introduced guayule lines and to determine the contents and yields of rubber and resin obtainable from its aboveground biomass. Seedlings of the accessions AZ-1, AZ-2, P803, and 11591 were field transplanted in 2015 at two locations of southern, and northern Sardinia, respectively, differing for annual precipitation. Plant survival rate, height and width, trunk diameter, leaf chlorophyll concentration and photosystem photochemical efficiency were monitored. Shoots were harvested at 30 months after transplanting and were partitioned into twigs and remaining stems and its rubber and resin contents were determined. Location markedly affected plant survival rates and biometric traits. Dry matter yield of aboveground components as well as contents of rubber and resin and plant rubber and resin yields differed significantly among accessions under comparison. We found that AZ1 and 11591 were the most successful accessions at southern Sardinia site, whereas 11591 was the only accession exhibiting a satisfactory plant survival rate in the northern location.

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Improved guayule lines outperform old lines in south-east Queensland

Cited by 10 publications

References 16 publications

Photosynthesis and assimilate partitioning between carbohydrates and isoprenoid products in vegetatively active and dormant guayule: physiological and environmental constraints on rubber accumulation in a semiarid shrub

Photosynthesis and assimilate partitioning between carbohydrates and isoprenoid products in vegetatively active and dormant guayule: physiological and environmental constraints on rubber accumulation in a semiarid shrub

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

Adaptation, Biometric Traits and Performances of Guayule Lines Grown in Two Mediterranean Environments

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