Biochemical regulation of rubber biosynthesis in guayule (Parthenium argentatum Gray)
نویسندگان
چکیده
Natural rubber is an irreplaceable raw material vital to industry, transportation, medicine and defense. It is largely produced from clonal plantations of Hevea brasiliensis in southeastern Asia. Temperate-zone rubber-producing crops are greatly desired to increase biodiversity, protect supplies, and provide a safe natural-rubber alternative for the large numbers of people suffering from Type I latex allergy to proteins in latex products. Parthenium argentatum (guayule) is currently under development in the United States as a suitable source of hypoallergenic latex. Improved P. argentatum lines are still desired with higher latex yields, improved agronomic characteristics, and broader growth range. Understanding the biochemical regulation of rubber yield (principally rate of synthesis) and quality (principally molecular weight distribution) in P. argentatum is an essential preliminary to the identification and manipulation of key regulatory steps. In this paper, the biochemical regulation of rubber biosynthesis in P. argentatum will be discussed and unique features highlighted. We find that the P. argentatum rubber transferase has kinetic f t w ©
منابع مشابه
Magnesium ion regulation of in vitro rubber biosynthesis by Parthenium argentatum Gray.
Natural rubber is produced by a rubber transferase (a cis-prenyltransferase). Rubber transferase uses allylic pyrophosphate to initiate the rubber molecule and isopentenyl pyrophosphate (IPP) to form the polymer. Rubber biosynthesis also requires a divalent metal cation. Understanding how molecular weight is regulated is important because high molecular weight is required for high quality rubbe...
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