PMID: 11925046Apr 2, 2002Paper

Isolation and characterization of lipid in phloem sap of canola

Planta
Ewa MadeyJohn E Thompson

Abstract

Phloem isolated from canola (Brassica napus L.) stems was found to contain phospholipid, diacylglycerol, triacylglycerol, steryl and wax esters, and comparatively high concentrations of unesterified fatty acids. Indeed, the composition of phloem lipid was markedly different from that of microsomal membranes and cytosol isolated from both leaves and stems. Specifically, phloem lipid consisted predominantly of unesterified fatty acids and was enriched in medium-chain fatty acids, in particular, lauric, myristic and pentadecanoic acids. This unique composition also distinguished phloem lipid from that of well-characterized cytosolic lipid particles such as oil bodies found in plant cells. Moreover, levels of medium-chain fatty acids in the phloem increased when canola plants were stressed by exposure to sublethal doses of ultraviolet irradiation. Phloem levels of lauric acid, for example, increased by 11-fold upon treatment with sublethal ultraviolet irradiation. Spherical lipid particles were discernible in isolated phloem sap by electron microscopy, suggesting that the lipid in phloem is in the form of lipid particles. The presence of lipid in phloem may be reflective of long-distance lipid transport in plants, primarily in the ...Continue Reading

Citations

May 26, 2010·Journal of Experimental Botany·Svetlana LeonovaAnders S Carlsson
Mar 24, 2012·Journal of Experimental Botany·Brandon S GueletteSusanne Hoffmann-Benning
May 3, 2013·Molecular Plant-microbe Interactions : MPMI·Carlos Augusto AvilaFiona L Goggin
Jun 6, 2012·The Arabidopsis Book·Joe LouisJyoti Shah
Jun 15, 2010·Comptes rendus biologies·Sylvie DinantJulia Kehr
Sep 16, 2008·Journal of Plant Physiology·Francesca M MittonLaura de la Canal
Nov 26, 2010·The Plant Journal : for Cell and Molecular Biology·Joe LouisJyoti Shah
Mar 7, 2013·Journal of Integrative Plant Biology·William J LucasPradeep Kachroo
May 21, 2016·Frontiers in Plant Science·Allison M BarbagliaSusanne Hoffmann-Benning
Apr 5, 2018·International Journal of Molecular Sciences·Jiamei LiFiona L Goggin
Feb 10, 2018·Frontiers in Plant Science·Tai-Hua HuMee-Len Chye
Apr 12, 2019·Journal of Experimental Botany·Aart J E van Bel, Rita Musetti
May 24, 2017·Plant Signaling & Behavior·Maria Filomena Valim, Nabil Killiny
Apr 11, 2018·Journal of Chemical Ecology·Patrick AbbotSarah P Lawson
Oct 10, 2021·Molecular Plant-microbe Interactions : MPMI

❮ Previous
Next ❯

Related Concepts

Related Feeds

Cell Biology of Lipids

Lipids are essential in many biological functions, including membrane structure, energy storage, and cell signaling. Find the latest research on the cell biology of lipids here.