The Composition of Latex from Hevea Brasiliensis as a Laticiferous Cytoplasm

D'Auzac, Jean; Jacob, J.

doi:10.1201/9781351075695-4

Cited by 23 publications

(18 citation statements)

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“…Arg (rubber tree) is the only plant widely cultivated to produce natural rubber (NR) (van Beilen and Poirier, 2007). NR (a cis 1, 4-polyisoprene) biosynthesis occurs on rubber particles suspended in rubber tree laticifers (d’Auzac et al, 1989). Latex (cytoplasmic content of laticifers) contants 30–50% cis -polyisoprene which is synthetized through the mevalonate pathway (Chow et al, 2007, 2012; Sando et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

HbMADS4, a MADS-box Transcription Factor from Hevea brasiliensis, Negatively Regulates HbSRPP

Wei

Guo

et al. 2016

Front. Plant Sci.

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In plants MADS-box transcription factors (TFs) play important roles in growth and development. However, no plant MADS-box gene has been identified to have a function related to secondary metabolites regulation. Here, a MADS-box TF gene, designated as HbMADS4, was isolated from Hevea brasiliensis by the yeast one-hybrid experiment to screen the latex cDNA library using the promoter of the gene encoding H. brasiliensis small rubber particle protein (HbSRPP) as bait. HbMADS4 was 984-bp containing 633-bp open reading frame encoding a deduced protein of 230 amino acid residues with a typical conserved MADS-box motif at the N terminus. HbMADS4 was preferentially expressed in the latex, but little expression was detected in the leaves, flowers, and roots. Its expression was inducible by methyl jasmonate and ethylene. Furthermore, transient over-expression and over-expression of HbMADS4 in transgenic tobacco plants significantly suppressed the activity of the HbSRP promoter. Altogether, it is proposed that HbMADS4 is a negative regulator of HbSRPP which participates in the biosynthesis of natural rubber.

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Section: Introductionmentioning

confidence: 99%

HbMADS4, a MADS-box Transcription Factor from Hevea brasiliensis, Negatively Regulates HbSRPP

Wei

Guo

et al. 2016

Front. Plant Sci.

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“…These contain 30–50% dry matter (94% polyisoprene and 6% non‐isoprene components, such as proteins, lipids and carbohydrates) (D'auzac et al . ; De Faÿ and Jacob ). During NR production, the formation of the polyisoprene coagulum is generated either by the addition of an acid to latex or by the activity of microbial communities naturally developing in the collecting cups.…”

Section: Introductionmentioning

confidence: 99%

Microbial communities in natural rubber coagula during maturation: impacts on technological properties of dry natural rubber

et al. 2018

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Natural rubber is a key elastomer for the tyre industry and for a variety of other applications. The majority of raw NR is obtained by natural coagulation of H. brasiliensis latex under the activity of micro-organisms. An improved understanding of the microbial communities involved in the maturation of NR coagula may lead to an improvement in the production process of raw NR to provide a better consistency in NR quality.

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“…NR is a highly valuable commercial biopolymer made from fresh Hevea latex. It is mostly composed of cis-1,4-polyisoprene and trace amounts of non-rubber components [8]. Latex is defined as a white colloidal cytoplasmic system produced by Hevea laticifer cells after tapping ( Figure 1A).…”

Section: Introductionmentioning

confidence: 99%

“…Latex is defined as a white colloidal cytoplasmic system produced by Hevea laticifer cells after tapping ( Figure 1A). It contains rubber particles, non-rubber particles, cytoplasmic C-serum, organelles, proteins, and lipids [3,8]. Latex may be separated into three main phases by a simple high speed centrifugation [9,10]: the top cream comprised of rubber particles (Zone 1-3) and Frey-Wyssling particles, the intermediate cytoplasmic C-serum, and the bottom fractions containing lutoids ( Figure 1B) [11].…”

Section: Introductionmentioning

confidence: 99%