Calcium (Ca2+) signals are essential transducers and regulators in many adaptive and developmental processes in plants. Protective responses of plants to a variety of environmental stress factors are mediated by transient changes of Ca2+ concentration in plant cells. Ca2+ ions are quickly transported by channel proteins present on the plasma membrane. During responses to external stimuli, various signal molecules are transported directly from extracellular to intracellular compartments via Ca2+ channel proteins. Three types of Ca2+ channels have been identified in plant cell membranes: voltage-dependent Ca2+-permeable channels (VDCCs), which is sorted to depolarization-activated Ca2+-permeable channels (DACCs) and hyperpolarization-activated Ca2+-permeable channels (HACCs), voltage-independent Ca2+-permeable channels (VICCs). They make functions in the abiotic stress such as TPCs, CNGCs, MS channels, annexins which distribute in the organelles, plasma membrane, mitochondria, cytosol, intracelluar membrane. This review summarizes recent advances in our knowledge of many types of Ca2+ channels and Ca2+ signals involved in abiotic stress resistance and responses in plant cells.
Plant Cell, Tissue and Organ Culture – Springer Journals
Published: Nov 29, 2017
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