Abstract
The gibberellins (GAs), unlike other groups of plant hormones, are defined by their chemical structure rather than by their biological activity. The GAs are all diterpenoid acids which have the same basic ent-gibberellane ring structure (structure 1). Within this basic ring system there are two main types of GAs, namely the C20-GAS which have a full complement of 20 carbon atoms (structure 2), and the C19-GAS in which the twentieth carbon atom has been lost by metabolism (structure 3). In all but one of the C19-GAS the carboxylic acid at carbon-19 bonds to carbon-10 to give a lactone bridge.
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© 1987 Martinus Nijhoff Publishers, Dordrecht
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Sponsel, V.M. (1987). Gibberellin Biosynthesis and Metabolism. In: Davies, P.J. (eds) Plant Hormones and their Role in Plant Growth and Development. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-3585-3_4
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DOI: https://doi.org/10.1007/978-94-009-3585-3_4
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