Abstract
We investigated the pattern and potential adaptive value of phenolic concentrations in galls induced by the aphid Hormaphis hamamelidis on leaves of Hamamelis virginiana. By the time that founding females began reproduction, galls had higher concentrations of condensed tannins and lower concentrations of hydrolyzable tannins than leaves. Galled and ungalled leaf laminas never differed significantly in any phenolic measure. Condensed tannin concentrations also were positively related to the number of offspring per gall when gall dry weight, another important correlate of fecundity, was accounted for. This could indicate the prior sink strength of the gall. Polyphenols may act as a repository for excess carbon drawn to the gall by increased sink strength, or be an indication of the fundatrix’ ability to manipulate host physiology. This study is the first to demonstrate a tangible, quantitative association between phenolic accumulation in galls and gall-former reproductive performance, and illustrates that condensed tannins may play roles other than plant defense.
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References
Adams, J. M., Rehill, B., Zhang, Y. J., and Gower, J. 2009. A test of the latitudinal defense hypothesis: herbivory, tannins and total phenolics in four North American tree species. Ecol. Res. 24:697–704.
Detoni, M. D., Vasconcelos, E. G., Scio, E., De Aguiar, J. A. K., Isaias, R. M. D., and Soares, G. L. G. 2010. Differential biochemical responses of Calliandra brevipes (Fabaceae, Mimosoidae) to galling behaviour by Tanaostigmodes ringueleti and T. mecanga (Hymenoptera, Tanaostigmatidae). Aust. J. Bot. 58:280–285.
Flaherty, L. and Quiring, D. 2008. Plant module size and dose of gall induction stimulus influence gall induction and galler performance. Oikos 117:1601–1608.
Ikai, N. and Hijii, N. 2007. Manipulation of tannins in oaks by galling cynipids. J. For. Res. 12:316–319.
Inbar, M., Izhaki, I., Koplovich, A., Lupo, I., Silanikove, N., Glasser, T., Gerchman, Y., Perevolotsky, A., and Lev-Yadun, S. 2009. Why do many galls have conspicuous colours? A new hypothesis. Arthropod-Plant Interactions 4:1–6.
Janzen, D. H. 1977. Why fruits rot, seeds mold, and meat spoils. Am. Nat. 111:691–713.
Nyman, T. and Julkunen-Tiitto, R. 2000. Manipulation of the phenolic chemistry of willows by gall-inducing sawflies. Proc. Natl. Acad. Sci. USA 97:13184–13187.
Rehill, B. J. and Schultz, J. C. 2001. Hormaphis hamamelidis and gall size: a test of the plant vigor hypothesis. Oikos 95:94–104.
Rehill, B. J. and Schultz, J. C. 2003. Enhanced invertase activities in the galls of Hormaphis hamamelidis. J. Chem. Ecol. 29:2703–2720.
Schultz, B. B. 1992. Insect herbivores as potential causes of mortality and adaptation in gallforming insects. Oecologia 90:297–299.
Acknowledgments
We thank Annie Rehill, Moriah Szpara, Olivier Gautreau, Alice Arrighi, Heidi Appel, Mike Grove, Bryan Severyn, and Tom Arnold for assistance and NSF grants DIB-9413204 and DEB-9902198 for support.
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Rehill, B.J., Schultz, J.C. Hormaphis hamamelidis Fundatrices Benefit by Manipulating Phenolic Metabolism of Their Host. J Chem Ecol 38, 496–498 (2012). https://doi.org/10.1007/s10886-012-0115-9
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DOI: https://doi.org/10.1007/s10886-012-0115-9