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Abstract

Terpenes are a multifarious group of secondary compounds present throughout the living world that function primarily in defence, or otherwise in regulating interactions between an organism and its environment. Terpene synthases (TPS) are a mid-sized gene family whose diversity and make-up reflects a plant’s ecological requirements and unique adaptive history. Here we catalogue TPS in Melaleuca alternifolia and examine lineage-specific expansion in TPS relative to other sequenced Myrtaceae. Overall, far fewer (37) putative TPS genes were identified in M. alternifolia compared with Eucalyptus grandis (113) and E. globulus (106). The number of genes in clade TPS-b1 (12), which encode enzymes that produce cyclic monoterpenes, was proportionally larger in M. alternifolia than in any other well-characterised plant. Relative to E. grandis, the isoprene-/ocimene-producing TPS-b2 clade in M. alternifolia tended to be proportionally smaller. This suggested there may be lineage-specific subfamily change in Melaleuca relative to other sequenced Myrtaceae, perhaps as a consequence of its semi-aquatic evolutionary history.

Item Type:	Article
Authors/Creators:	Calvert, J and Baten, A and Butler, J and Barkla, B and Shepherd, M
Keywords:	melaleuca, terpene synthase, tea tree, Eucalyptus, monoterpene, Corymbia
Journal or Publication Title:	Plant Systematics and Evolution
Publisher:	Springer-Verlag Wien
ISSN:	0378-2697
DOI / ID Number:	10.1007/s00606-017-1454-3
Copyright Information:	© Springer-Verlag GmbH Austria 2017
Item Statistics:	View statistics for this item

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