Plant systems have evolved a comparably simple, but nevertheless efficient capability to react on the different kinds of woundings, to which they all are subject during their life cycle. In any event, the cells adherent to the wound are stimulated to greatly enhanced metabolic action, for which the widely known “wound respiration” is but one striking indication. Most of these wound-reactions were thoroughly investigated in tissue systems from bulky plant storage organs and have been shown to be dependent on previous protein synthesis. This protein synthesis in turn is totally dependent on previous RNA synthesis, so that one is forced to concentrate on the formation of these macromolecules of outstanding importance if interested in the molecular basis of wound-reactions.
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