Ken's Google Scholar page
Peer-Reviewed Publications (Underlined names denotes authors from my lab. Asterisk denotes corresponding author):
51. Sanderson, B. J., Ghambir, D., Feng, G., Hu, N., Cronk, Q. C., Percy, D. M., Molina Freaner, F., Johnson, M. G., Smart, L. B., Keefover-Ring, K., Yin, T., Ma, T., Difazio, S. P. Liu, J, Olson, M. S.* 2023. Phylogenomics reveals patterns of ancient hybridization and differential diversification contributing to phylogenetic conflict in Populus L. and Salix L. Accepted at Systematic Biology
50. Alavez-Rosas, D., Nguyen, L., and Keefover-Ring, K.* 2022. Retention indices for naturally-occurring chiral and achiral compounds on common gas chromatography chiral stationary phases. Results in Chemistry 4:100659
49. Wang, D., Li, Y., Li, M., Yang, W., Ma, X., Zhang, L., Wang, Y., Feng, Y., Zhang, Y., Zhou, R., Sanderson, B. J., Keefover‑Ring, K., Yin, T., Smart, L. B., DiFazio, S. P., Liu, J., Olson, M. and Ma, T. 2022. Repeated turnovers keep sex chromosomes young in willows. Genome Biology 23:200
48. Keefover-Ring, K.* 2022. The chemical biogeography of a widespread aromatic plant species shows both spatial and temporal variation. Ecology and Evolution 12:e9265
47. Keefover-Ring, K.*, Carlson, C. H., Hyden, B., Azeem, M., and Smart, L. B. 2022. Genetic mapping of sexually dimorphic volatile and nonvolatile floral secondary chemistry of a dioecious willow. Journal of Experimental Botany
46. Keefover-Ring, K., Hetherington, M., Brunet, J.* 2022. Population‐specific responses of floral volatiles to abiotic factors in changing environments. American Journal of Botany
45. Karimi, N.*, Saghafi, S., Keefover-Ring, K., Venter, S. M., and Baum, D. A. 2022. Evidence for hawkmoth pollination in the chiropterophilous African baobab (Adansonia digitata). Biotropica 54:113-124
44. Erbilgin, N.*, Zanganeh, L., Klutsch, J. G. Chen, S-h., Zhao, S., Ishangulyyeva, G., Burr, S. J., Gaylord, M., Hofstetter, R., Keefover-Ring, K., Raffa, K. F., and Kolb, T. 2021. Combined drought and bark beetle attacks deplete non-structural carbohydrates and promote death of mature pine trees. Plant Cell and Environment 44:3866-3881
43. Cope, O.*, Keefover-Ring, K., Kruger, E., and Lindroth, R. L. 2021. Growth-defense tradeoffs shape the genetic composition of aspen forests. Proceedings of the National Academy of Sciences 118:e2103162118
42. Hahn, P.*, Keefover-Ring, K., Nguyen, L., and Maron, J. 2021. Intraspecific correlations between growth and defense vary with resource environment and differ within- and among populations. Functional Ecology 35:2387-2396
41. Simon, S., Keefover-Ring, K., Park, Y-L., Wimp, G. M. Grady, J., and DiFazio, S.* 2021. Characterization of Salix nigra floral insect community and activity of three native Andrena bees. Ecology and Evolution 11:4688-4700 PDF
40. Sanderson, B. J.,*, Feng, G., Hu, N., Carlson, C. H. Smart, L. B., Keefover-Ring, K., Yin, T., Ma, T., Liu, J., DiFazio, S., P., and Olson, M. S. 2021. Sex determination through X-Y heterogamety in Salix nigra. Heredity 126:630-639 PDF
39. Holeski, L. M.*, Keefover-Ring, K., Sobel, J. M., and Kooyers, N. J. 2021. Evolutionary history and ecology shape the diversity and abundance of phytochemical arsenals across monkeyflowers. Journal of Evolutionary Biology 34:571-583 PDF - Supp. material
38. Cope, O.*, Lindroth, R. L., Keefover-Ring, K., and Kruger, E. 2020. Trait plasticity and tradeoffs shape intraspecific variation in competitive response in a foundation tree species. New Phytologist 230:710-719 PDF + Suppl. Material
37. Yang, W., Zhang, Z., Wang, D., Li, Y., Tong, S., Li, M., Zhang, X., Zhang, L., Ren, L., Ma, X., Zhou, R., Sanderson, B. J., Keefover-Ring, K., Yin, T., Smart, L. B., Liu, J.*, DiFazio, S. P.*, Olson, M.*, Ma, T.* 2020. A general model to explain repeated turnovers of sex determination in the Salicaceae. Molecular Biology and Evolution PDF
36. Francoeur, C. B., Khadempour, L., Moreira-Soto, R. D., Gotting, K., Book, A. J., Pinto-Tomás, A. A., Keefover-Ring, K., and Currie, C. R.* 2020. Bacteria contribute to plant secondary compound degradation in a generalist herbivore system. mBio 11:e02146-20 PDF
35. Khadempour, L., Fan, H., Keefover-Ring, K., Carlos-Shanley, C., Nagamoto. N. S, Dam, M. A., Pupo, M. T., and Currie, C. R.* 2020. Metagenomics reveals diet-specific specialization of bacterial communities in fungus gardens of grass- and dicot-cutter ants. Frontiers in Microbiology 11:570770 PDF
34. Howe, M., Mason, C. J., Gratton, C., Keefover-Ring, K., Wallin, K., Yanchuk, A., Zhu, J., and K. F. Raffa.* 2020. Relationships between conifer constitutive and inducible defenses against bark beetles change across levels of biological and ecological scale. Okios 129:1093-1107 PDF
33. Simon, S., Tschaplinski, T. J., Leboldus, J., Keefover-Ring, K., Azeem, M., Jin-Gui Chen, J-G., Macaya-Sanz1, D. MacDonald, W. L., Muchero, W., Tuskan, G. A., and S. P. DiFazio*. 2020. Host plant genetic control of associated fungal and insect species in a Populus hybrid. Ecology and Evolution 10:5119-5134 PDF
32. Feng, G., Sanderson, B. J., Keefover-Ring, K., Liu, J., Ma, T., Yin, T., Smart, L., DiFazio, S., and M. Olson*. 2020. Pathways to sex determination in plants: How many roads lead to Rome? Current Opinion in Plant Biology 54:61–68 PDF
31. Kruger, E.*, Keefover-Ring, K., Holeski, L., R. L. Lindroth. 2020. To compete or defend: linking functional trait variation with life-history tradeoffs in a foundation tree species. Oecologia 192:893–907 PDF
30. Wang, M., Zhang, L., Zhang Z., Li, M., Wang, D., Zhang, X., Xi, Z., Keefover-Ring, K., Smart, L. B., DiFazio, S., Olson, M. S., Yin, T., Liu, J., and T. Ma*. 2020. Phylogenomics of the genus Populus reveals extensive interspecific gene flow and balancing selection. New Phytologist 225:1370-1382 PDF
29. Moreira, X.*, Abdala-Roberts, L., Nell, C. S., Vázquez-González, C., Pratt, J. D., Keefover-Ring, K., and K. A. Mooney. 2019. Sexual and genotypic variation in terpene quantitative and qualitative profiles in the dioecious shrub Baccharis salicifolia. Scientific Reports 9, 14655 PDF
28. Kolb, T.*, Keefover-Ring, K., Burr, S. J., Hofstetter, R., Gaylord, M., and K. F. Raffa. 2019. Drought-mediated changes in tree physiological processes weaken tree defenses to bark beetle attack. Journal of Chemical Ecology 45:888-900 PDF
27. Thompson, J. D., Amiot, J., Borron, C., Linhart, Y. B., Keeefover-Ring, K., and P. Gauthier*. 2019. Spatial heterogeneity of gall formation in relation to chemotype distribution in Thymus vulgaris. Plant Ecology 220:777-788 PDF
26. Rehman, S., K. Keefover-Ring, Ihsan ul Haq, E. Dilshad, M. I. Khan, N. Akhtar, and B. Mirza. 2018. Drier climatic conditions increase withanolide content of Withania coagulans enhancing its inhibitory potential against human prostate cancer cells. Applied Biochemistry and Biotechnology 188:460-480 PDF
25. Fang, L., H. Liu, S. Wei, K. Keefover-Ring, and T. Yin*. 2018. High-density genetic map of Populus deltoides constructed by using specific length amplified fragment sequencing. Tree Genetics & Genomes 14:79 PDF
24. Mason, C. J.*, K. Keefover-Ring, C. Villari, J. G. Klutsch, S. Cook, P. Bonello, N. Erbilgin, Raffa, and P. A. Townsend. 2018. Anatomical defenses against bark beetles relate to degree of 1 historical exposure between species and are allocated independently of chemical defenses within trees. Plant, Cell & Environment 42:633-646 PDF
23. Falk, M.*, R.L. Lindroth, K. Keefover-Ring, and K.F. Raffa. 2018. Genetic variation in aspen phytochemical patterns structures windows of opportunity for gypsy moth larvae. Oecologia 187:471–482 - Featured in: Special Topic: From Plants to Herbivores PDF + Supplementary material
22. Howe M., K. Keefover-Ring, and K. F. Raffa*. 2018. Pine engravers carry bacterial communities whose members reduce concentrations of host monoterpenes with variable degrees of redundancy, specificity, and capability. Environmental Entomology 47:638–645 PDF
21. Rubert-Nason K.*, K. Keefover-Ring, and R. L. Lindroth. 2018. Purification and analysis of salicinoids. Current Analytical Chemistry 14:423-429 PDF
20. Trowbridge, A.*, K. Keefover-Ring. 2017. Home on the (expanding) range: evaluating the effectiveness of a novel host’s induced defenses against the mountain pine beetle-fungal complex. Invited commentary. Tree Physiology 37:1593-1596 PDF
19. Mason, C. J.*, C. Villari, K. Keefover-Ring, S. Jagemann, J. Zhu, P. Bonello, and K. F. Raffa. 2017. Spatial and temporal components of induced plant responses in the context of herbivore life history and impact on host. Functional Ecology 31:2034–2050 PDF
18. Raffa, K. F.*, C. J. Mason, P. Bonello, S. Cook, N. Erbilgin, K. Keefover-Ring, J. G. Klutsch, C. Villari, and P. A. Townsend. 2017. Defense syndromes in lodgepole–whitebark pine ecosystems relate to degree of historical exposure to mountain pine beetles. Plant, Cell & Environment 40:1791-1806 PDF
Cover photo for the issue by Phil Townsend
17. Keefover-Ring, K.*, K. Rubert-Nason, A.E. Bennett, and R.L. Lindroth. 2016. Growth and chemical responses of trembling aspen to simulated browsing and ungulate saliva. Journal of Plant Ecology 9:474-484 PDF
16. Keefover-Ring, K.*, A. Trowbridge, C.J. Mason, and K.F. Raffa. 2016. Rapid induction of multiple terpenoid groups by ponderosa pine in response to bark beetle-associated fungi. Journal of Chemical Ecology 42:1-12 PDF
Cover photo for the issue by Amy Trowbridge
15. Barnes, P.W,*, Tobler, M.A., K. Keefover-Ring, S.D. Flint, A.E. Barkley, R.J. Ryel, and R.L. Lindroth. 2016. Rapid modulation of UV-shielding in plants is influenced by solar UV radiation and linked to alterations in flavonoids. Plant, Cell & Environment 39:222-230 PDF
14. Keefover-Ring, K*. 2015. Bergamot versus beetle: evidence for intraspecific chemical specialization. AoB PLANTS 7: plv132 PDF
13. Linhart, Y.B.*, P. Gauthier, K. Keefover-Ring, and J.D. Thompson. 2015. Variable phytotoxic effects of Thymus vulgaris (Lamiaceae) terpenes upon associated species. International Journal of Plant Sciences 176:20–30 PDF - Supplementary material
12. Keefover-Ring, K., M. Ahnlund, I. Nacif Abreu, S. Jansson, T. Moritz, and B.R. Albrectsen*. 2014. No evidence of geographical structure of salicinoid chemotypes within Populus tremula. PLoS ONE 9:e107189 PDF
11. Keefover-Ring, K.*, L.M. Holeski, M.D. Bowers, A.D. Clauss, and R.L. Lindroth. 2014. Phenylpropanoid glycosides of Mimulus guttatus (yellow monkeyflower). Phytochemistry Letters 10:132-139 PDF - Supplementary material
10. Pratt, J.D.*, K. Keefover-Ring, L.Y. Liu, and K.A. Mooney. 2014. Genetically based latitudinal variation in Artemisia californicasecondarychemistry. Oikos 123:953–963 PDF
9. Keefover-Ring, K., M. Carlsson, and B.R. Albrectsen*. 2014. 2'-(Z)-Cinnamoylsalicortin: A novel salicinoid from Populus tremula. Phytochemistry Letters 7:212-216 PDF
8. Boone, C.K., K. Keefover-Ring, A.C. Mapes, A.S. Adams, J. Bohlmann, and K.F. Raffa*. 2013. Bacteria associated with a tree-killing insect reduce concentrations of plant defense compounds. Journal of Chemical Ecology 39:1003–1006 - Featured in special issue: Microbial Chemical Ecology PDF
7. Holeski, L.M.*, K. Keefover-Ring, M.D. Bowers, Z.T. HarnEnz, and R.L. Lindroth. 2013. Patterns of phytochemical variation in Mimulus guttatus (yellow monkeyflower). Journal of Chemical Ecology 39:525-536 PDF
6. Keefover-Ring K.* 2013. Making scents of defense: do fecal shields and herbivore-caused volatiles match host plant chemical profiles? Chemoecology 23:1-11 PDF
5. Keefover-Ring K.* and Y.B. Linhart. 2010. Variable chemistry and herbivory in ponderosa pine cones. International Journal of Plant Sciences 171:293-302 (Almost had the cover photo, see the mockup below) PDF
(Almost) Cover photo for the issue by Ken Keefover-Ring
4. Keefover-Ring K.*, J.D. Thompson, and Y.B. Linhart. 2009. Beyond six scents: defining a seventh Thymus vulgaris chemotype new to southern France by ethanol extraction. Flavour and Fragrance Journal 24:117-122 PDF
3. Groendahl E., Ehlers, B.K.*, and K. Keefover-Ring. 2008. New cis-sabinene hydrate chemotype detected in large thyme (Thymus pulegioides L.) growing wild in Denmark. Journal of Essential Oil Research 20:40-41 PDF
2. Thompson J.D.*, P. Gauthier , J. Amiot, B.K. Ehlers , C. Collin , V. Fossat J., Barrios , F. Arnaud-Miramont , K. Keefover-Ring, and Y.B. Linhart. 2007. Ongoing adaptation to Mediterranean climate extremes in a chemically polymorphic plant. Ecological Monographs 77:421-439 PDF
1. Linhart Y.B.*, K. Keefover-Ring, K.A. Mooney, B. Breland , and J.D. Thompson. 2005. A chemical polymorphism in a multi-trophic setting: thyme monoterpene composition and food web structure. American Naturalist 166:517-529 PDF
Non Peer-Reviewed Publications:
Keefover-Ring K. 2007. Prairies make good scents: Bee balm, a prairie native. The Shortgrass Prairie Review 3(3):8-9 PDF
Keefover-Ring K. 2006. Monarda fistulosa: Making good scents in Colorado. Aquilegia 30(2):3-4 PDF