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Philos Trans R Soc Lond B Biol Sci

Title:		Mutualism has its limits: consequences of asymmetric interactions between a well-defended plant and its herbivorous pollinator
Author(s):		Balbuena MS; Broadhead GT; Dahake A; Barnett E; Vergara M; Skogen KA; Jogesh T; Raguso RA;
Address:		"Department of Neurobiology and Behaviour, Cornell University, Ithaca, NY 14853, USA. Instituto de Fisiologia, Biologia Molecular y Neurociencias (IFIBYNE), CONICET, Universidad de Buenos Aires, C1428EHA, Argentina. Department of Ecology and Evolutionary Biology, University of California, Santa Cruz, CA 95060, USA. Negaunee Institute for Plant Conservation Science and Action, Chicago Botanic Garden, Glencoe, IL 60035, USA"
Journal Title:		Philos Trans R Soc Lond B Biol Sci
Year:		2022
Volume:		20220502
Issue:		1853
Page Number:		20210166 -
DOI:		10.1098/rstb.2021.0166
ISSN/ISBN:		1471-2970 (Electronic) 0962-8436 (Print) 0962-8436 (Linking)
Abstract:		"Concern for pollinator health often focuses on social bees and their agricultural importance at the expense of other pollinators and their ecosystem services. When pollinating herbivores use the same plants as nectar sources and larval hosts, ecological conflicts emerge for both parties, as the pollinator's services are mitigated by herbivory and its larvae are harmed by plant defences. We tracked individual-level metrics of pollinator health-growth, survivorship, fecundity-across the life cycle of a pollinating herbivore, the common hawkmoth, Hyles lineata, interacting with a rare plant, Oenothera harringtonii, that is polymorphic for the common floral volatile (R)-(-)-linalool. Linalool had no impact on floral attraction, but its experimental addition suppressed oviposition on plants lacking linalool. Plants showed robust resistance against herbivory from leaf-disc to whole-plant scales, through poor larval growth and survivorship. Higher larval performance on other Oenothera species indicates that constitutive herbivore resistance by O. harringtonii is not a genus-wide trait. Leaf volatiles differed among populations of O. harringtonii but were not induced by larval herbivory. Similarly, elagitannins and other phenolics varied among plant tissues but were not herbivore-induced. Our findings highlight asymmetric plant-pollinator interactions and the importance of third parties, including alternative larval host plants, in maintaining pollinator health. This article is part of the theme issue 'Natural processes influencing pollinator health: from chemistry to landscapes'"
Keywords:		Animals Bees Ecosystem Female Flowers *Herbivory *Pollination Symbiosis asymmetric interactions elagitannins linalool pollinating herbivore pollinator health prairie endemic;
Notes:		"MedlineBalbuena, Maria Sol Broadhead, Geoffrey T Dahake, Ajinkya Barnett, Emily Vergara, Melissa Skogen, Krissa A Jogesh, Tania Raguso, Robert A eng Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. England 2022/05/03 Philos Trans R Soc Lond B Biol Sci. 2022 Jun 20; 377(1853):20210166. doi: 10.1098/rstb.2021.0166. Epub 2022 May 2"