Dove, R., Wolfe, E. R., Stewart, N. U., & Ballhorn, D. J. (2024) Root nodules of red alder (Alnus rubra) and Sitka alder (Alnus viridis ssp. sinuata) are inhabited by taxonomically diverse cultivable microbial endophytes. MicrobiologyOpen, 12(3), e1422. https://doi/10.1002/mbo3.1422

Bustos-Segura, C., Godschalx, A. L., Malacari, L., Deiss, F., Rasmann, S., Ballhorn, D. J., & Benrey, B. (2024). Rhizobia-legume symbiosis mediates direct and indirect interactions between plants, herbivores and their parasitoids. Heliyon, 10(6). https://doi.org/10.1016/j.heliyon.2024.e27815

Godschalx, A. L., Diethelm, A. C., Kautz, S., & Ballhorn, D. J. (2023). Nitrogen-Fixing Rhizobia Affect Multitrophic Interactions in the Field. Journal of Insect Behavior, 36(3), 168–179. https://doi.org/10.1007/s10905-023-09833-8

Younginger, B. S., Stewart, N. U., Balkan, M. A., & Ballhorn, D. J. (2023). Stable coexistence or competitive exclusion? Fern endophytes demonstrate rapid turnover favouring a dominant fungus. Molecular Ecology, 32(1), 244–257. https://doi.org/10.1111/mec.16732

Van Court, R. C., Wiseman, M. S., Meyer, K. W., Ballhorn, D. J., Amses, K. R., Slot, J. C., Dentinger, B. T. M., Garibay-Orijel, R., & Uehling, J. K. (2022). Diversity, biology, and history of psilocybin-containing fungi: Suggestions for research and technological development. In Fungal Biology (Vol. 126, Issue 4, pp. 308–319). Elsevier B.V. https://doi.org/10.1016/j.funbio.2022.01.003

Wolfe, E. R., Dove, R., Webster, C., & Ballhorn, D. J. (2022). Culturable fungal endophyte communities of primary successional plants on Mount St. Helens, WA, USA. BMC Ecology and Evolution, 22(1). https://doi.org/10.1186/s12862-022-01974-2

Wolfe, E. R., Singleton, S., Stewart, N. U., Balkan, M. A., & Ballhorn, D. J. (2022). F rankia diversity in sympatrically occurring red alder (Alnus rubra) and Sitka alder (Alnus viridis) trees in an early successional environment. Trees - Structure and Function, 36(5), 1665–1675. https://doi.org/10.1007/s00468-022-02317-w

Balkan, M. A., Stewart, N. U., Kauffman, E. S., Wolfe, E. R., & Ballhorn, D. J. (2020). Genotypic Diversity and Host-Specificity of Frankia Bacteria Associated with Sympatric Populations of Alnus rubra and Alnus rhombifolia in Oregon. Northwest Science, 93(3–4), 244–252. https://doi.org/10.3955/046.093.0307

Dove, R., Wolfe, E. R., Stewart, N. U., & Ballhorn, D. J. (2020). Ecoregion - Rather Than Sympatric Legumes - Influences Symbiotic Bradyrhizobium Associations in Invasive Scotch Broom (Cytisus scoparius) in the Pacific Northwest. Northwest Science, 94(2), 142–159. https://doi.org/10.3955/046.094.0205

Wolfe, E. R., & Ballhorn, D. J. (2020). Do foliar endophytes matter in litter decomposition? In Microorganisms (Vol. 8, Issue 3). MDPI AG. https://doi.org/10.3390/microorganisms8030446

Vadassery, J., Ballhorn, D. J., Fleming, S. R., Mazars, C., Pandey, S. P., Schmidt, A., Schuman, M. C., Yeh, K. W., Yilamujiang, A., & Mithöfer, A. (2019). Neomycin: An Effective Inhibitor of Jasmonate-Induced Reactions in Plants. Journal of Plant Growth Regulation, 38(2), 713–722. https://doi.org/10.1007/s00344-018-9884-x

Ballhorn, D. J., Wolfe, E. R., Tyler, J., Ronan, W., Sands-Gouner, S., Shaw, C., Balkan, M. A., & Kautz, S. (2018). Quantitative effects of soil salinity on the symbiosis of wild lima bean (Phaseolus lunatus L.) and Bradyrhizobium in Costa Rica. Journal of Applied Botany and Food Quality, 91, 304–309. https://doi.org/10.5073/JABFQ.2018.091.039

Wolfe, E. R., Kautz, S., Singleton, S. L., & Ballhorn, D. J. (2018). Differences in foliar endophyte communities of red alder (Alnus rubra) exposed to varying air pollutant levels. Botany, 96(12), 825–835. https://doi.org/10.1139/cjb-2018-0085

Ballhorn, D. J., Elias, J. D., Balkan, M. A., Fordyce, R. F., & Kennedy, P. G. (2017). Colonization by nitrogen-fixing Frankia bacteria causes short-term increases in herbivore susceptibility in red alder (Alnus rubra) seedlings. Oecologia, 184(2), 497–506. https://doi.org/10.1007/s00442-017-3888-2

Ballhorn, D. J., Elias, J. D., Balkan, M. A., Fordyce, R. F., & Kennedy, P. G. (2017). Colonization by nitrogen-fixing Frankia bacteria causes short-term increases in herbivore susceptibility in red alder (Alnus rubra) seedlings. Oecologia, 184(2), 497–506. https://doi.org/10.1007/s00442-017-3888-2

Eppley, T. M., Tan, C. L., Arrigo-Nelson, S. J., Donati, G., Ballhorn, D. J., & Ganzhorn, J. U. (2017). High Energy or Protein Concentrations in Food as Possible Offsets for Cyanide Consumption by Specialized Bamboo Lemurs in Madagascar. International Journal of Primatology, 38(5), 881–899. https://doi.org/10.1007/s10764-017-9987-4

Godschalx, A. L., Tran, V. Y., & Ballhorn, D. J. (2017). Host plant cyanotype determines degree of rhizobial symbiosis. Ecosphere, 8(9). https://doi.org/10.1002/ecs2.1929

Kautz, S., Williams, T., & Ballhorn, D. J. (2017). Ecological Importance of Cyanogenesis and Extrafloral Nectar in Invasive English Laurel, Prunus laurocerasus. Northwest Science, 91(2), 214–221. https://doi.org/10.3955/046.091.0210

Younginger, B. S., & Ballhorn, D. J. (2017). Fungal endophyte communities in the temperate fern polystichum munitum show early colonization and extensive temporal turnover. American Journal of Botany, 104(8), 1188–1194. https://doi.org/10.3732/ajb.1700149

Younginger, B. S., Sirová, D., Cruzan, M. B., & Ballhorn, D. J. (2017). Is biomass a reliable estimate of plant fitness? Applications in Plant Sciences, 5(2). https://doi.org/10.3732/apps.1600094

Ballhorn, D. J., Kautz, S., & Laumann, J. M. (2016). Herbivore damage induces a transgenerational increase of cyanogenesis in wild lima bean (Phaseolus lunatus). Chemoecology, 26(1), 1–5. https://doi.org/10.1007/s00049-015-0201-x

Ballhorn, D. J., Rakotoarivelo, F. P., & Kautz, S. (2016). Coevolution of Cyanogenic Bamboos and Bamboo Lemurs on Madagascar. PLoS ONE, 11(8). https://doi.org/10.1371/journal.pone.0158935

Ballhorn, D. J., Schädler, M., Elias, J. D., Millar, J. A., & Kautz, S. (2016). Friend or foe - Light availability determines the relationship between mycorrhizal fungi, rhizobia and lima bean (Phaseolus lunatus L.). PLoS ONE, 11(5). https://doi.org/10.1371/journal.pone.0154116

Godschalx, A. L., Stady, L., Watzig, B., & Ballhorn, D. J. (2016). Is protection against florivory consistent with the optimal defense hypothesis? BMC Plant Biology, 16(1). https://doi.org/10.1186/s12870-016-0719-2

Schädler, M., & Ballhorn, D. J. (2016). Beneficial Soil Microbiota as Mediators of the Plant Defensive Phenotype and Aboveground Plant-Herbivore Interactions (pp. 305–343). https://doi.org/10.1007/124_2016_13

Blue, E., Kay, J., Younginger, B. S., & Ballhorn, D. J. (2015). Differential effects of type and quantity of leaf damage on growth, reproduction and defence of lima bean (Phaseolus lunatus L.). Plant Biology, 17(3), 712–719. https://doi.org/10.1111/plb.12285

Godschalx, A. L., Scha¨dler, M., Scha¨dler, S., Trisel, J. A., Balkan, M. A., & Ballhorn, D. J. (2015). Ants are less attracted to the extrafloral nectar of plants with symbiotic, nitrogen-fixing rhizobia. In Ecology (Vol. 96, Issue 2).

Ballhorn, D. J., & Elias, J. D. (2014). Salinity-mediated cyanogenesis in white clover (Trifolium repens) affects trophic interactions. Annals of Botany, 114(2), 357–366. https://doi.org/10.1093/aob/mcu141

Ballhorn, D. J., Kay, J., & Kautz, S. (2014). Quantitative Effects of Leaf Area Removal on Indirect Defense of Lima Bean (Phaseolus lunatus) in Nature. Journal of Chemical Ecology, 40(3), 294–296. https://doi.org/10.1007/s10886-014-0392-6

Ballhorn, D. J., Younginger, B. S., & Kautz, S. (2014). An aboveground pathogen inhibits belowground rhizobia and arbuscular mycorrhizal fungi in Phaseolus vulgaris. BMC Plant Biology, 14(1). https://doi.org/10.1186/s12870-014-0321-4

Kautz, S., Trisel, J. A., & Ballhorn, D. J. (2014). Jasmonic Acid Enhances Plant Cyanogenesis and Resistance to Herbivory in Lima Bean. Journal of Chemical Ecology, 40(11–12), 1186–1196. https://doi.org/10.1007/s10886-014-0524-z

Ballhorn, D. J., Godschalx, A. L., & Kautz, S. (2013). Co-Variation of Chemical and Mechanical Defenses in Lima Bean (Phaseolus lunatus L.). Journal of Chemical Ecology, 39(3), 413–417. https://doi.org/10.1007/s10886-013-0255-6

Ballhorn, D. J., Kautz, S., & Heil, M. (2013). Distance and Sex Determine Host Plant Choice by Herbivorous Beetles. PLoS ONE, 8(2). https://doi.org/10.1371/journal.pone.0055602

Ballhorn, D. J., Kautz, S., & Schädler, M. (2013). Induced plant defense via volatile production is dependent on rhizobial symbiosis. Oecologia, 172(3), 833–846. https://doi.org/10.1007/s00442-012-2539-x

De Roissart, A., Peña, E. de la, Van Oyen, L., Van Leeuwen, T., Ballhorn, D. J., & Bonte, D. (2013). The presence of root-feeding nematodes - Not AMF - Affects an herbivore dispersal strategy. Acta Oecologica, 52, 38–44. https://doi.org/10.1016/j.actao.2013.07.005

Millar, J. A., & Ballhorn, D. J. (2013). Effect of mycorrhizal colonization and light limitation on growth and reproduction of lima bean (Phaseolus lunatus L.). Journal of Applied Botany and Food Quality, 86(1), 172–179. https://doi.org/10.5073/JABFQ.2013.086.023

Kautz, S., Ballhorn, D. J., Kroiss, J., Pauls, S. U., Moreau, C. S., Eilmus, S., Strohm, E., & Heil, M. (2012). Host plant use by competing acacia-ants: Mutualists monopolize while parasites share hosts. PLoS ONE, 7(5). https://doi.org/10.1371/journal.pone.0037691

Wybouw, N., Balabanidou, V., Ballhorn, D. J., Dermauw, W., Grbić, M., Vontas, J., & Van Leeuwen, T. (2012). A horizontally transferred cyanase gene in the spider mite Tetranychus urticae is involved in cyanate metabolism and is differentially expressed upon host plant change. Insect Biochemistry and Molecular Biology, 42(12), 881–889. https://doi.org/10.1016/j.ibmb.2012.08.002

Ballhorn, D. J. (2011). Constraints of Simultaneous Resistance to a Fungal Pathogen and an Insect Herbivore in Lima Bean (Phaseolus lunatus L.). Journal of Chemical Ecology, 37(2), 141–144. https://doi.org/10.1007/s10886-010-9905-0

Ballhorn, D. J. (2011). Cyanogenic Glycosides in Nuts and Seeds. In Nuts and Seeds in Health and Disease Prevention (pp. 129–136). Elsevier. https://doi.org/10.1016/B978-0-12-375688-6.10014-3

Ballhorn, D. J., Kautz, S., Jensen, M., Schmitt, I., Heil, M., & Hegeman, A. D. (2011). Genetic and environmental interactions determine plant defences against herbivores. Journal of Ecology, 99(1), 313–326. https://doi.org/10.1111/j.1365-2745.2010.01747.x

Ballhorn, D. J., Reisdorff, C., & Pfanz, H. (2011). Quantitative effects of enhanced CO2 on jasmonic acid induced plant volatiles of lima bean (Phaseolus lunatus L.). In Journal of Applied Botany and Food Quality (Vol. 84).

Ballhorn, D. J., Schmitt, I., Fankhauser, J. D., Katagiri, F., & Pfanz, H. (2011). CO2-mediated changes of plant traits and their effects on herbivores are determined by leaf age. Ecological Entomology, 36(1), 1–13. https://doi.org/10.1111/j.1365-2311.2010.01240.x

Thamer, S., Schädler, M., Bonte, D., & Ballhorn, D. J. (2011). Dual benefit from a belowground symbiosis: Nitrogen fixing rhizobia promote growth and defense against a specialist herbivore in a cyanogenic plant. Plant and Soil, 341(1–2), 209–219. https://doi.org/10.1007/s11104-010-0635-4

Ballhorn, D. J., Kautz, S., & Lieberei, R. (2010). Comparing responses of generalist and specialist herbivores to various cyanogenic plant features. Entomologia Experimentalis et Applicata, 134(3), 245–259. https://doi.org/10.1111/j.1570-7458.2009.00961.x

Ballhorn, D. J., Pietrowski, A., & Lieberei, R. (2010). Direct trade-off between cyanogenesis and resistance to a fungal pathogen in lima bean (Phaseolus lunatus L.). Journal of Ecology, 98(1), 226–236. https://doi.org/10.1111/j.1365-2745.2009.01591.x

Bonte, D., de Roissar, A., Vandegehuchte, M. L., Ballhorn, D. J., van Leeuwen, T., & de la Peña, E. (2010). Local adaptation of aboveground herbivores towards plant phenotypes induced by soil biota. PLoS ONE, 5(6). https://doi.org/10.1371/journal.pone.0011174

Ballhorn, D. J., Kautz, S., Heil, M., & Hegeman, A. D. (2009). Cyanogenesis of wild lima bean (Phaseolus lunatus L.) is an efficient direct defence in nature. PLoS ONE, 4(5). https://doi.org/10.1371/journal.pone.0005450

Ballhorn, D. J., Kautz, S., & Rakotoarivelo, F. P. (2009). Quantitative variability of cyanogenesis in Cathariostachys madagascariensis - the main food plant of bamboo lemurs in southeastern Madagascar. American Journal of Primatology, 71(4), 305–315. https://doi.org/10.1002/ajp.20653

Kautz, S., Pauls, S. U., Ballhorn, D. J., Lumbsch, H. T., & Heil, M. (2009). Polygynous supercolonies of the acacia-ant Pseudomyrmex peperi, an inferior colony founder. Molecular Ecology, 18(24), 5180–5194. https://doi.org/10.1111/j.1365-294X.2009.04395.x

Yi, H. S., Heil, M., Adame-Álvarez, R. M., Ballhorn, D. J., & Ryu, C. M. (2009). Airborne induction and priming of plant defenses against a bacterial pathogen. Plant Physiology, 151(4), 2152–2161. https://doi.org/10.1104/pp.109.144782

Ballhorn, D. J., Kautz, S., Lion, U., & Heil, M. (2008). Trade-offs between direct and indirect defences of lima bean (Phaseolus lunatus). Journal of Ecology, 96(5), 971–980. https://doi.org/10.1111/j.1365-2745.2008.01404.x

Ballhorn, D. J., Schiwy, S., Jensen, M., & Heil, M. (2008). Quantitative variability of direct chemical defense in primary and secondary leaves of lima bean (Phaseolus lunatus) and consequences for a natural herbivore. Journal of Chemical Ecology, 34(10), 1298–1301. https://doi.org/10.1007/s10886-008-9540-1

Ballhorn, D. J., Heil, M., Pietrowski, A., & Lieberei, R. (2007). Quantitative effects of cyanogenesis on an adapted herbivore. Journal of Chemical Ecology, 33(12), 2195–2208. https://doi.org/10.1007/s10886-007-9380-4

Ballhorn, D. J., & Lieberei, R. (2006). Oviposition choice of Mexican bean beetle (Epilachna varivestis) depends on host plants cyanogenic capacity. Journal of Chemical Ecology, 32(8), 1861–1865. https://doi.org/10.1007/s10886-006-9114-z

Ballhorn, D. J., Heil, M., & Lieberei, R. (2006). Phenotypic plasticity of cyanogenesis in lima bean Phaseolus lunatus - Activity and activation of β-glucosidase. Journal of Chemical Ecology, 32(2), 261–275. https://doi.org/10.1007/s10886-005-9001-z

Ballhorn, D. J., Lieberei, R., & Ganzhorn, J. U. (2005). Plant cyanogenesis of Phaseolus lunatus and its relevance for herbivore-plant interaction: The importance of quantitative data. Journal of Chemical Ecology, 31(7), 1445–1473. https://doi.org/10.1007/s10886-005-5791-2