Chemical constituents and physical properties of guayule wood and bark poo chowa, francis s. Arid land agricultural research center, usdaars, maricopa, az 85238. The fragility of a singlesource, geographically concentrated supply of natural rubber, a critical material of the modern economy, has brought guayule parthenium argentatum a. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext. Parthenium argentatum an overview sciencedirect topics. Guayule parthenium argentatum is a perennial shrub in the asteraceae family and synthesizes a high quality, hypoallergenic cis 1,4polyisoprene or natural rubber. However, the guayule transcriptome assembly from the diploid accession pi478640 is accessible in the public ncbi database hodgins et al. Parthenium is a vigorous species that colonises weak pastures with sparse ground cover. Comparative analysis of the complete sequence of the. Guayule is the only source of natural rubber latex free of tropical proteins. Pdf files can be viewed using adobes free reader software. Tbe growth of guayule plants was stimulated equally by tbe addition to tbe soil of either 100 g g. Finding specific words in a pdf file thrift savings plan.
Natural rubber nr is a nonfungible and valuable biopolymer, used to manufacture 50 000 rubber products, including tires and medical gloves. Convert and create pdf from various types of files like word doc, excel xls, powerpoint ppt. Frontiers downregulation of a cyp74 rubber particle. Gray, originates from the southern texas and northern mexico deserts, and is receiving wide attention as a natural rub ber crop that could successfully grow in arid and semiarid regions. Resins allow guayule to resist many diseases and pests. Guayule parthenium argentatum is a perennial shrub in the asteraceae family and synthesizes a high quality, hypoallergenic cis1,4polyisoprene or natural rubber. The improvement of guayule for commercialscale production has been limited by the lack of genomic tools and wellcharacterized genetic resources. This page was last edited on 10 december 2019, at 12. Introduction studies on hybridization in guayule parthenium argentatum gray conducted under the guayule research project of the united states department of agriculture at salinas, california, revealed that apomixis occurred in this species powers and rollins, 1945. The moths larvae feed inside the stem, forming galls that stunt the plants growth, reduce competitiveness and seed production. Media in category parthenium argentatum the following 37 files are in this category, out of 37 total. Transgenic guayule lines with aos gene expression downregulated by rnai aosi exhibited strong phenotypes that included. Parthenium can also colonise brigalow, gidgee and softwood scrub soils.
Guayule, parthenium argentatum, rubbercontaining desert shrub of the family asteraceae, native to the northcentral plateau of mexico and the big bend area of texas. Artificial exposure to low temperatures induces rubber accumulation in guayule in plants older than approximately 120 days 8. The recent availabilities of a crystal structure for the atypical a. A related species, parthenium argentatum gray guayule yields rubber which can substitute for hevea rubber. Guayule rubber and latex products are not available in the market largely because the raw material cost is higher than the current sources produced in southeast asia and other tropical countries hevea brasiliensis. Guayule, a desert rubber plant arizona daily independent. Guayule parthenium argentatum gray, a rubberplant of. Guayule parthenium argentatum genetics, biochemistry, plant breeding, agronomics, rubber extraction and coproduct utilization have been studied during 19761988 to determine its potential as a domestic source of natural rubber for the usa. Parthenium argentatum muchbranched subshrub with silvery leaves and small white flowers of texas and northern mexico. The name parthenium is derived from either the greek word parthenos, meaning virgin, or parthenion, an ancient name for a plant. To open these files, you will need adobe reader software on macintosh os 89 or windows systems. Parthenium argentatum guayule is a source of hypoallergenic latex note, however, that the mainstream scientific subjects are discussed and linked to in both of the above articles about fringe subjects the astrology article discusses astronomy, and autodynamics discusses special relativity.
Pdf phytoanalysis of parthenium hysterophorus l root, stem. Potential applications of guayulins to improve feasibility of guayule cultivation. All structured data from the file and property namespaces is available under the creative commons cc0 license. Despite its potential to be an alternative nr supplier, the enzymes for cis polyisoprene biosynthesis have not been comprehensively studied in guayule. Guayule parthenium argentatum is a small woody, flowering shrub native to the southwestern united states and northern mexico. Guayule parthenium argentatum is a relatively new commercial crop and the only species other than the brazilian rubber tree hevea brasiliensis that has been used for latex production on a commercial scale. Transcriptome analysis of rubber biosynthesis in guayule. Growth and nutrition of guayule parthenium argentatum in. Previously identified as an allene oxide synthase aos, this cyp74 constitutes the most abundant protein found in guayule rubber particles. Agricultural production of the desert shrub, guayule parthenium argentatum g. Parthenium hysterophorus plant causes milk disease in.
Guayule parthenium argentatum gray is a silvergraygreen perennial shrub used as a renewable source of natural rubber or latex. The sequence provides important information useful for genetic engineering strategies. Files are available under licenses specified on their description page. Epiblema strenuana is a moth introduced from mexico established in all parthenium areas. Guayule parthenium argentatum gray is a natural rubber cisi,4 polyisoprene producing crop, native to north america. With acrobat reader dc, you can do more than just open and view pdf files. Qualitative analysis of aqueous parthenium hysterophorus root, stem extract was studied for the presence. Guayule parthenium argentatum is a relatively new commercial crop and the only species other than the brazilian rubber tree hevea brasiliensis that has been used for latex pro duction on a commercial scale. Parthenium department of agriculture and fisheries.
In the select file to insert dialog box, locate and. Morphology of reproduction in guayule and certain other. Aimthe plant parthenium hysterophorus is a bitter weed, able to spread easily by wind, commonly seen in all places. Clipping as a method of harvesting guayule for rubber. It is regarded as one of the worst weeds in australia because of its invasiveness, potential. Guayulins c and d from guayule parthenium argentatum. Keep up to date with the latest news via these social media platforms. Guayule parthenium argentatum gray, a rubberplant of the chihuahuan desert, by francis ernest lloyd. Pdf triterpenes in parthenium argentatum, structures of.
Guayule resin detection and influence on guayule rubber. Chemical constituents and physical properties of guayule. Pdf converter is a online webbased document to pdf converter software. Potent contact allergen in the rubber plant guayule. Unlike rubber produced from tropical plants, the latex in guayule is hypoallergenic, i. Recently, implications of the protein complex involving cis. It is a weed of national significance in australia.
Parthenium pdf parthenium weed is a weed of national. Details guayule parthenium argentatum gray, a rubber. Chapter 6 genetic improvement of guayule parthenium. The desire to reduce the environmental cost of rubber production, fears of pathogen susceptibility in clonal hevea plantations, volatility in the price of natural rubber, and increasing labor costs have motivated efforts to diversify the supply of natural rubber by developing alternative rubber crops such as guayule parthenium argentatum gray. Characterization of cisprenyltransferase complexes in. Gray to the forefront as an alternative source of natural rubber. Prehistoric indians are believed to have obtained rubber by chewing the bark of the plant. It has small white flowers and narrow silvery leaves that alternate along the stem. It will readily colonise disturbed, bare areas along roadsides and heavily stocked areas around yards and watering points.
Browse pictures and read growth cultivation information about guayule parthenium argentatum supplied by member gardeners in the plantfiles database at daves garden. The pdf file can be easily downloaded to your computer, enabling you to view it offline at your convenience. Frontiers molecular studies of the protein complexes. Guayule asteraceae is a dominant element of the flora on the limestone bajadas and hillsides of northern mexico and west texas.
Rubber biosynthesis in guayule occurs when the shrub experiences low nighttime temperatures below 57 c during the winter in the cortical parenchyma of stems 9,10,11, 14. Commercially cultivated guayule parthenium argentatum plants for nr production are polyploids, making the analysis of gene family difficult due to gene redundancy. Incaniline isoargentatin a from parthenium argentatum. We report functional genomics studies of a cyp74 rubber particle protein from parthenium argentatum, commonly called guayule. Rapid screening tools are needed to replace the current laborintensive and costinefficient method for quantifying rubber and resin contents. Guayule parthenium argentatum gray is an interesting alternative and renewable source of rubberlatex which has been used in the past. Asteraceae parthenium is a serious problem in several tropical and subtropical areas around the world and particularly an emerging problem in southern africa. The increasing demand for nr, coupled with limitations and vulnerability of h. Parthenium definition of parthenium by the free dictionary. Parthenium argentatum, commonly known as the guayule. The word parthenium is derived from the latin parthenice suggesting medicinal uses bailey 1960. Most documents on our website are posted in one or more of three formats. Guayule parthenium argentatum gray, a rubberplant of the chihuahuan desert.
Triterpenes in parthenium argentatum, structures of argtntatins c and d. Native to the semiarid areas of northern mexico and texas, specifically the chihuahuan desert, it was commercially exploited during periods of rubber shortage caused by petroleum embargos or lack of supplies linked to the two world wars, mainly to manufacture tyres. Preliminary investigation on the natural durability of guayule parthenium argentatum based wood products by francis s. Gray, a plant native to semiarid regions of northern mexico and southern texas in the united states, is an alternative source for natural rubber nr. Parthenium is a genus of north american shrubs in the sunflower tribe within the daisy family the name parthenium is derived from either the greek word parthenos, meaning virgin, or parthenion, an ancient name for a plant parthenium or gajar ghans is the most common invasive species in india. Sign up to receive the latest news, content highlights, and promotions. Pdf documents can contain links and buttons, form fields, audio, video, and business logic. In order to study the air pollution tolerance index of p. Despite its potential to be an alternative nr supplier, the enzymes for cispolyisoprene biosynthesis have not been comprehensively studied in guayule. Foxit software is the reliable source for fast, affordable, and secure pdf solutions. A highthroughput quantification of resin and rubber. Parthenium argentatum guayule is an industrial crop that produces latex, which was recently commercialized as a source of latex rubber safe for people with type i latex allergy. Preliminary investigation on the natural durability of.
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