Correlations between physical and chemical defences in plants: tradeoffs, syndromes, or just many different ways to skin a herbivorous cat?

Moles, Angela T. and Peco, Begona and Wallis, Ian R. and Foley, William J. and Poore, Alistair G.B. and Seabloom, Eric W. and Vesk, Peter A. and Bisigato, Alejandro J. and Cella-Pizarro, Lucrecia and Clark, Connie J. and Cohen, Philippe S. and Cornwell, William K. and Edwards, Will and Ejrnaes, Rasmus and Gonzales-Ojeda, Therany and Graae, Bente J. and Hay, Gregory and Lumbwe, Fainess C. and Magana-Rodriguez, Benjamın and Moore, Ben D. and Peri, Pablo L. and Poulsen, John R. and Stegen, James C. and Veldtman, Ruan and Zeipel, Hugovon and Andrew, Nigel R. and Boulter, Sarah L. and Borer, Elizabeth T. and Cornelissen, Johannes H. C. and Farji-Brener, Alejandro G. and DeGabriel, Jane L. and Jurado, Enrique and Kyhn, Line A. and Low, Bill and Mulder, Christa P. H. and Reardon-Smith, Kathryn and Rodriguez-Velazquez, Jorge and De Fortier, An and Zheng, Zheng and Blendinger, Pedro G. and Enquist, Brian J. and Facelli, Jose M. and Knight, Tiffany and Majer, Jonathan D. and Martinez-Ramos, Miguel and McQuillan, Peter and Hui, Francis K. C. (2013) Correlations between physical and chemical defences in plants: tradeoffs, syndromes, or just many different ways to skin a herbivorous cat? New Phytologist, 198 (1). pp. 252-263. ISSN 0028-646X

Abstract

� Most plant species have a range of traits that deter herbivores. However, understanding of how different defences are related to one another is surprisingly weak. Many authors argue that defence traits trade off against one another, while others argue that they form coordinated
defence syndromes.
� We collected a dataset of unprecedented taxonomic and geographic scope (261 species spanning 80 families, from 75 sites across the globe) to investigate relationships among four chemical and six physical defences.
� Five of the 45 pairwise correlations between defence traits were significant and three of these were tradeoffs. The relationship between species’ overall chemical and physical defence levels was marginally nonsignificant (P = 0.08), and remained nonsignificant after accounting for phylogeny, growth form and abundance. Neither categorical principal component analysis (PCA) nor hierarchical cluster analysis supported the idea that species displayed defence syndromes.
� Our results do not support arguments for tradeoffs or for coordinated defence syndromes. Rather, plants display a range of combinations of defence traits. We suggest this lack of consistent defence syndromes may be adaptive, resulting from selective pressure to deploy a different combination of defences to coexisting species.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: © 2013 The Authors and New Phytologist Trust. Published version deposited in accordance with the copyright policy of the publisher.
Faculty / Department / School: Current - USQ Other
Date Deposited: 26 Jul 2013 03:25
Last Modified: 11 Jul 2014 03:21
Uncontrolled Keywords: cyanogenesis; extrafloral nectaries; hair; leaf toughness; lipid; plant–herbivore interactions; spines; tannin
Fields of Research : 06 Biological Sciences > 0603 Evolutionary Biology > 060303 Biological Adaptation
06 Biological Sciences > 0603 Evolutionary Biology > 060302 Biogeography and Phylogeography
06 Biological Sciences > 0607 Plant Biology > 060799 Plant Biology not elsewhere classified
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970106 Expanding Knowledge in the Biological Sciences
Identification Number or DOI: 10.1111/nph.12116
URI: http://eprints.usq.edu.au/id/eprint/23273

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