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Parthenium argentatum

ABSTRACT: Parthenium argentatum overview

PROVIDER: PRJNA289548 | ENA |

REPOSITORIES: ENA

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Dataset's files

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			Action	DRS
	SRR2103470.fastq.gz	Fastqsanger.gz
	SRR2103480.fastq.gz	Fastqsanger.gz
	SRR2103490.fastq.gz	Fastqsanger.gz
	SRR2103500.fastq.gz	Fastqsanger.gz
	SRR2103510.fastq.gz	Fastqsanger.gz

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Parthenium argentatum

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Parthenium argentatum strain:W6 429

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Parthenium argentatum cultivar:AZ-2

Project description:Transcriptome analysis of rubber biosynthesis in guayule (Parthenium argentatum Gray)

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Transcriptome analysis of rubber biosynthesis in guayule (Parthenium argentatum gray).

Project description:BACKGROUND:Natural rubber is currently produced nearly exclusively from latex of the Para rubber tree, Hevea brasiliensis. 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). In Hevea, latex is produced as an exudate following wounding while in guayule, rubber is deposited within the cortical parenchyma and its production is strongly influenced by environmental conditions. RESULTS:To better understand the enzymology and regulation of guayule rubber biosynthesis and to identify genes with potential uses in the improvement of rubber yields, we conducted de novo transcriptome assembly and differential gene expression analyses of this process in guayule. This analysis supports a role for rubber in the defense against pathogens, identified new enzymes potentially involved in the biosynthesis of rubber as well as transcription factors specifically expressed in rubber-producing tissues. CONCLUSIONS:Data presented here will be useful in the improvement of guayule as an alternative source of natural rubber and in better understanding the biosynthesis of this critical polymer. In particular, some of the candidate transcription factors are likely to control the rubber biosynthesis pathway and are good targets for molecular breeding or engineering of guayule plants with higher and more consistent production of rubber.

| S-EPMC6373111 | biostudies-literature

Comparative analysis of the complete sequence of the plastid genome of Parthenium argentatum and identification of DNA barcodes to differentiate Parthenium species and lines.

Project description:BackgroundParthenium 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. The complete plastid genome of P. argentatum was sequenced. The sequence provides important information useful for genetic engineering strategies. Comparison to the sequences of plastid genomes from three other members of the Asteraceae, Lactuca sativa, Guitozia abyssinica and Helianthus annuus revealed details of the evolution of the four genomes. Chloroplast-specific DNA barcodes were developed for identification of Parthenium species and lines.ResultsThe complete plastid genome of P. argentatum is 152,803 bp. Based on the overall comparison of individual protein coding genes with those in L. sativa, G. abyssinica and H. annuus, we demonstrate that the P. argentatum chloroplast genome sequence is most closely related to that of H. annuus. Similar to chloroplast genomes in G. abyssinica, L. sativa and H. annuus, the plastid genome of P. argentatum has a large 23 kb inversion with a smaller 3.4 kb inversion, within the large inversion. Using the matK and psbA-trnH spacer chloroplast DNA barcodes, three of the four Parthenium species tested, P. tomentosum, P. hysterophorus and P. schottii, can be differentiated from P. argentatum. In addition, we identified lines within P. argentatum.ConclusionThe genome sequence of the P. argentatum chloroplast will enrich the sequence resources of plastid genomes in commercial crops. The availability of the complete plastid genome sequence may facilitate transformation efficiency by using the precise sequence of endogenous flanking sequences and regulatory elements in chloroplast transformation vectors. The DNA barcoding study forms the foundation for genetic identification of commercially significant lines of P. argentatum that are important for producing latex.

| S-EPMC2784773 | biostudies-literature

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