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Lipid Metabolism in Plants Under High Temperature

A. Bhattacharya

Published 2019 in Effect of High Temperature on Crop Productivity and Metabolism of Macro Molecules

ABSTRACT

Abstract Lipids are an essential constituent of all plant cells. The vegetative cells of plants contain 5%–10% lipid by dry weight, and almost all of this weight is found in the membranes. Although each square centimeter of a plant leaf may contain only 0.2 mg of lipid, this can account to 400 cm 2 of membrane, reflecting the fact that membrane lipids are arranged in layers just two molecules thick (5–8 nm). If a leaf mesophyll cell were to be expanded a million times, the membranes would still be less than 1 cm thick. Despite their slight dimensions, however, lipid membranes are the main barrier delineating the cell and its compartments, and they form the sites where many essential processes occur, including the light-harvesting and electron-transport reactions of photosynthesis. Some plant cells produce much more lipid than do leaf mesophyll cells. Lipids are the major form of carbon storage in the seeds of many plant species, constituting up to 60% of the dry weight of such seeds. Epidermal cells produce cuticular lipids that coat the surface of plants, providing the crucial hydrophobic barrier that prevents water loss and also giving protection against pathogens and other environmental stresses. In addition to the abundant cellular lipids, minor amounts of fatty acids are important as precursors to the hormone jasmonic acid and in acylation of certain membrane proteins.

PUBLICATION RECORD

  • Publication year

    2019

  • Venue

    Effect of High Temperature on Crop Productivity and Metabolism of Macro Molecules

  • Publication date

    Unknown publication date

  • Fields of study

    Biology, Chemistry, Environmental Science

  • Identifiers
    DOI 10.1016/B978-0-12-817562-0.00004-5
  • External record

    Open on Semantic Scholar

  • Source metadata

    Semantic Scholar

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