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The American Journal of Semiotics

Volume 24, Issue 1/3, 2008

Biosemiotics

Günther Witzany
Pages 39-56

The Biosemiotics of Plant Communication

This contribution demonstrates that the development and growth of plants depends on the success of complex communication processes. These communication processes are primarily sign-mediated interactions and are not simply an mechanical exchange of ‘information’, as that term has come to be understood (or misunderstood) in science. Rather, such interactions as I will be describing here involve the active coordination and organisation of a great variety of different behavioural patterns — all of which must be mediated by signs. Thus proposed, a biosemiotics of plant communication investigates communication processes both within and among the cells, tissues, and organs of plants as sign-mediated interactions which follow (1) combinatorial (syntactic), (2) context-sensitive (pragmatic) and (3) content-specific (semantic) levels of rules. As will be seen in the cases under investigation, the context of interactions in which a plant organism is interwoven determines the content arrangement of its response behaviour. And as exemplified by the multiply semiotic roles played by the plant hormone auxin that I will discuss below, this means that a molecule type of identical chemical structure may function in the instantiation of different meanings (semantics) that are determined by the different contexts (pragmatics) in which this sign is used.

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