Acyl-lipid metabolism.

Abstract

Acyl lipids in Arabidopsis and all other plants have a myriad of diverse functions. These include providing the core diffusion barrier of the membranes that separates cells and subcellular organelles. This function alone involves more than 10 membrane lipid classes, including the phospholipids, galactolipids, and sphingolipids, and within each class the variations in acyl chain composition expand the number of structures to several hundred possible molecular species. Acyl lipids in the form of triacylglycerol account for 35% of the weight of Arabidopsis seeds and represent their major form of carbon and energy storage. A layer of cutin and cuticular waxes that restricts the loss of water and provides protection from invasions by pathogens and other stresses covers the entire aerial surface of Arabidopsis. Similar functions are provided by suberin and its associated waxes that are localized in roots, seed coats, and abscission zones and are produced in response to wounding. This chapter focuses on the metabolic pathways that are associated with the biosynthesis and degradation of the acyl lipids mentioned above. These pathways, enzymes, and genes are also presented in detail in an associated website (ARALIP: http://aralip.plantbiology.msu.edu/). Protocols and methods used for analysis of Arabidopsis lipids are provided. Finally, a detailed summary of the composition of Arabidopsis lipids is provided in three figures and 15 tables.

DOI: 10.1199/tab.0161

52 Figures and Tables

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@article{LiBeisson2010AcyllipidM, title={Acyl-lipid metabolism.}, author={Yonghua Li-Beisson and Basil S. Shorrosh and Fred Beisson and Mats X Andersson and Vincent Arondel and Philip D Bates and S{\'e}bastien Baud and David A. Bird and Allan Debono and Timothy P. Durrett and Rochus Benni Franke and Ian A Graham and Kenta Katayama and Am{\'e}lie A Kelly and Tony Robert Larson and Jonathan E Markham and Martine Miquel and Isabel Molina and Ikuo Nishida and Owen Rowland and Lacey Samuels and Katherine M. Schmid and Hajime Wada and Ruth Welti and Changcheng Xu and R{\'e}mi Zallot and John B. Ohlrogge}, journal={The Arabidopsis book}, year={2010}, volume={8}, pages={e0133} }