1st Edition

Physiology of Stressed Crops, Vol. 5 Membrane System

By U S Gupta Copyright 2007
    418 Pages
    by CRC Press

    Though plant cells are separated by cell walls, cells maintain their identity as they are delimited by semi-permeable membranes that permit them to function as autonomous units. The flow of materials in and out of the cell is regulated by channels, transporters, pumps, and acquaporins in these membranes. The cytoplasm is sandwiched between two membranes: the plasma membrane, which forms the outer boundary of the cytoplasm, and the tonoplast or the vacuolar membrane which forms the inner boundary. Cell membranes serve several different functions: form boundaries and provide compartmentalization, site of chemical reactions catalyzed by membrane proteins, regulate the exchange of ions/compounds across the barrier, site of perception/transmission of signals (hormones), and act in cell-to-cell communication. The membrane functions are affected by different abiotic (biotic stress not discussed), nutritional, edaphic and mechanical stresses, which have been discussed in this volume in light of the recent literature

    Cold and Freezing
    Heat Stress
    Drought Stress
    Salinity Stress
    Hypoxic Stress
    Oxidative Stress
    UV-B Radiation Stress
    Nutrient Deficiency Stress
    Heavy Metal Toxicity Stress
    Soil Acidity Stress
    Mechanical Stress and Wounding
    Low Humidity Stress


    U S Gupta