Glycolipid composition of Hevea brasiliensis latex.

Abstract:

:Glycolipids of fresh latex from three clones of Hevea brasiliensis were characterized and quantified by HPLC/ESI-MS. Their fatty acyl and sterol components were further confirmed by GC/MS after saponification. The four detected glycolipid classes were steryl glucosides (SG), esterified steryl glucosides (ESG), monogalactosyl diacylglycerols (MGDG) and digalactosyl diacylglycerols (DGDG). Sterols in SG, ESG and total latex unsaponifiable were stigmasterol, β-sitosterol and Δ⁵-avenasterol. The latter was found instead of fucosterol formerly described. Galactolipids were mainly DGDG and had a fatty acid composition different from that of plant leaves as they contained less than 5% C18:3. Glycolipids, which represented 27-37% of total lipids, displayed important clonal variations in the proportions of the different fatty acids. ESG, MGDG and DGDG from clone PB235 differed notably by their higher content in furan fatty acid, which accounted for more than 40% of total fatty acids. Clonal variation was also observed in the relative proportions of glycolipid classes except MGDG (8%), with 43-51% DGDG, 30-34% SG and 7-19% ESG. When compared with other plant cell content, the unusual glycolipid composition of H. brasiliensis latex may be linked to the peculiar nature of this specialized cytoplasm expelled from laticiferous system, especially in terms of functional and structural properties.

journal_name

Phytochemistry

journal_title

Phytochemistry

authors

Liengprayoon S,Sriroth K,Dubreucq E,Vaysse L

doi

10.1016/j.phytochem.2011.04.023

subject

Has Abstract

pub_date

2011-10-01 00:00:00

pages

1902-13

issue

14-15

eissn

0031-9422

issn

1873-3700

pii

S0031-9422(11)00247-0

journal_volume

72

pub_type

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