Abstract
The biogeography of pungency in three species of wild chili in the chaco and surrounding highland habitats of southeastern Bolivia is described. We report that Capsicum chacoense, C. baccatum, and C. eximium are polymorphic for production of capsaicin and its analogs, such that completely pungent and completely nonpungent individuals co-occur in some populations. In C. chacoense, the density of plants and the proportion of pungent plants increased with elevation. Above 900 m, all individuals in all populations except two were pungent; nonpungent individuals in at least one of the two polymorphic populations were likely a result of spreading by humans. The occurrence of pungent and nonpungent individuals in three species of ancestral Capsicum and the geographic variation of pungency within species suggest that production of capsaicin and its analogs entails both costs and benefits, which shift from one locality to another. Determining the selection pressures behind such shifts is necessary to understand the evolution of pungency in chilies.


Similar content being viewed by others
References
Adler, L. S., Schmitt, J., and Bowers, M. D. 1995. Genetic variation in defensive chemistry in Plantago lanceolata (Plantaginaceae) and its effect on the specialist herbivore Junonia coenia (Nymphalidae). Oecologia 101:75–85.
Andrews, J. 1996. Peppers, the Domesticated Capsicums. UT Press, Austin, Utah.
Baldwin, I. T. 1998. Jasmonate-induced responses are costly but benefit plants under attack in native populations. Proc. Natl. Acad. Sci. USA 95:8113–8118.
Berenbaum, M. R. 1995. The chemistry of defense—theory and practice. Proc. Natl. Acad. Sci. USA 92:2–8.
Berenbaum, M. R. and Feeny, P. 1981. Toxicity of angular furanocoumarins to swallowtail butterflies: escalation in a coevolutionary arms race? Science 212:927–929.
Berenbaum, M. R. and Zangerl, A. R. 1998. Chemical phenotype matching between a plant and its insect herbivore. Proc. Natl. Acad. Sci. USA 95:13743–13748.
Blum, E., Liu, K., Mazourek, M., Yoo, E. Y., Jahn, M., and Paran, I. 2002. Molecular mapping of the C locus for presence of pungency in Capsicum. Genome 45:702–705.
Blum, E., Mazourek, M., O'Connell, M., Curry, J., Thorup, T., Liu, K. D., Jahn, M., and Paran, I. 2003. Molecular mapping of capsaicinoid biosynthesis genes and quantitative trait loci analysis for capsaicinoid content in Capsicum. Theor. Appl. Genet. 108:79–86.
Bosland, P. W. 1994. Chiles—history, cultivation, and uses, pp. 347–366, in G. Charalambous (ed.). Spices, Herbs and Edible Fungi. Elsevier, Amsterdam.
Cipollini, M. L. 2000. Secondary metabolites of vertebrate-dispersed fruits: evidence for adaptive functions. Rev. Chil. Hist. Nat. 73:421–440.
Cipollini, M. L. and Levey, D. J. 1997. Secondary metabolites of fleshy vertebrate-dispersed fruits: adaptive hypotheses and implications for seed dispersal. Am. Nat. 150:346–372.
Cipollini, M. L., Paulk, E., and Cipollini, D. F. 2002. Effect of nitrogen and water treatment on leaf chemistry in horsenettle (Solanum carolinense), and relationship to herbivory by flea beetles (Epitrix spp.) and tobacco hornworm (Manduca sexta). J. Chem. Ecol. 28:2377–2398.
Collins, M. D., Wasmund, L. M., and Bosland, P. W. 1995. Improved method for quantifying capsaicinoids in capsicum using high-performance liquid-chromatography. HortScience 30:137–139.
Cordell, G. A. and Araujo, O. E. 1993. Capsaicin: identification, nomenclature, and pharmacotherapy. Ann. Pharmacother. 27:330–336.
Cronin, G. and Hay, M. E. 1996. Within plant variation in seaweed palatability and chemical defenses: optimal defense theory versus the growth differentiation balance hypothesis. Oecologia 105:361–368.
D'Arcy, W. G. and Eshbaugh, W. H. 1974. New world peppers (Capsicum–Solanaceae) north of Columbia: a resume. Baileya 19:93–105.
DeWitt, D. and Bosland, P. W. 1996. Peppers of the World: An Identification Guide. Ten Speed Press, Berkeley.
Eshbaugh, W. H. 1970. A biosystematic and evolutionary study of Capsicum baccatum (Solanaceae). Brittonia 22:31–43.
Eshbaugh, H. W. 1976. XXI. Genetic and biochemical systematic studies of chili peppers (Capsicum–Solanaceae). Bull. Torrey Bot. Club 102:396–403.
Eshbaugh, W. H., Smith, P. G., and Nickrent, D. L. 1983. Capsicum tovarii (Solanaceae), a new species of pepper from Peru. Brittonia 35:55–60.
Fornoni, J., Valverde, P. L., and Nunez-Farfan, J. 2004. Population variation in the cost and benefit of tolerance and resistance against herbivory in Datura stramonium. Evolution 58:1696–1704.
Fujiwake, H., Suzuki, T., and Iwai, K. 1982. Formation and metabolism of the pungent principle of capsicum fruits. 11. Capsaicinoid formation in the protoplast from the placenta of capsicum fruits. Agric. Biol. Chem. 46:2591–2592.
Futuyma, D. J. 1998. Evolutionary Biology, 3rd ed. Sinauer Associates, Sunderland, MA.
Futuyma, D. J. and Mitter, C. 1996. Insect–plant interactions: the evolution of component communities. Proc. R. Soc. Biol. 351:1361–1366.
Govindarajan, V. S. 1986. Capsicum—production, technology, chemistry, and quality. 3. Chemistry of the color, aroma, and pungency stimuli. Crit. Rev. Food Sci. Nutr. 24:245–355.
Govindarajan, V. S. and Sathyanarayana, M. N. 1991. Capsicum—production, technology, chemistry, and quality. 5. Impact on physiology, pharmacology, nutrition, and metabolism—structure, pungency, pain, and desensitization sequences. Crit. Rev. Food Sci. Nutr. 29:435–474.
Govindarajan, V. S., Rajalakshmi, D., and Chand, N. 1987. Capsicum—production, technology, chemistry, and quality. 4. Evaluation of quality. Crit. Rev. Food Sci. Nutr. 25: 185–282.
Harvell, K. P. and Bosland, P. W. 1997. The environment produces a significant effect on pungency of chiles. HortScience 32:1292.
Heiser, C. B. and Smith, P. V. 1958. New species of Capsicum from South America. Brittonia 10:194–201.
Iwai, K., Suzuki, T., and Fujiwake, H. 1979. Formation and accumulation of pungent principle of hot pepper fruits, capsaicin and its analogs, in Capsicum annuum var. annuum at different growth-stages after flowering. Agri. Biol. Chem. 43:2493–2498.
Izhaki, I. 2002. Emodin—a secondary metabolite with multiple ecological functions in higher plants. New Phytol. 155:205–217.
Izhaki, I., Tsahar, E., Paluy, I., and Friedman, J. 2002. Within population variation and interrelationships between morphology, nutritional content, and secondary compounds of Rhamnus alaternus fruits. New Phytol. 156:217–223.
Jahn, A. E., Davis, S. E., and Saavedra Zankys, A. M. 2002. Patterns of austral bird migration in the Bolivian chaco. J. Field Ornithol. 73:258–267.
Kawada, T., Watanabe, T., Katsura, K., Takami, H., and Iwai, K. 1985. Formation and metabolism of pungent principle of capsicum fruits. 15. Microdetermination of capsaicin by high-performance liquid-chromatography with electrochemical detection. J. Chromatogr. 329:99–105.
Lerdau, M., Litvak, M., and Monson, R. 1994. Plant chemical defense—monoterpenes and the growth-differentiation balance hypothesis. Trends Ecol. Evol. 9:58–61.
McDonald, E. P., Agrell, J., and Lindroth, R. L. 1999. CO2 and light effects on deciduous trees: growth, foliar chemistry, and insect performance. Oecologia 119:389–399.
McLeod, M. J., Guttman, S. I., and Eshbaugh, W. H. 1982. Early evolution of chile peppers (Capsicum). Econ. Bot. 36:361–386.
McLeod, M. J., Guttman, S. I., Eshbaugh, W. H., and Rayle, R. E. 1983. An electrophoretic study of evolution in Capsicum (Solanaceae). Evolution 37:562–574.
Morton, C. V. 1938. Capsicum, in P. C. Standley (ed.). Flora of Costa Rica, University Microfilms.
Redman, A. M., Cipollini, D. F., and Schultz, J. C. 2001. Fitness costs of jasmonic acid-induced defense in tomato, Lycopersicon esculentum. Oecologia 126:380–385.
Ribera, M. O., Libermann, M., Beck, S., and Moraes, M. 1994. Mapa de la vegetacion y areas protegidea de Bolivia. 1:1,500,000. Centro de investigaciones y manejo de recursos naturales (CIMAR) and Universidad Autónoma Gabriel Rene Moreno (UAGRM), La Paz, Bolivia.
Rice, W. R. 1989. Analyzing tables of statistical tests. Evolution 43:223–225.
Rowell, K. and Blinn, D. W. 2003. Herbivory on a chemically defended plant as a predation deterrent in Hyalella azteca. Freshw. Biol. 48:247–254.
Schemske, D. W. and Bradshaw, H. D. 1999. Pollinator preference and the evolution of floral traits in monkeyflowers (Mimulus). Proc. Natl. Acad. Sci. USA 96:11910–11915.
Schmitt, T. M., Hay, M. E., and Lindquist, N. 1995. Constraints on chemically mediated coevolution—multiple functions for seaweed secondary metabolites. Ecology 76:107–123.
Scoville, W. L. 1912. Note on capsicum. J. Am. Pharm. Assoc. 1:453.
Siepielski, A. M. and Benkman, C. W. 2004. Interactions among moths, crossbills, squirrels, and lodgepole pine in a geographic selection mosaic. Evolution 58:95–101.
Stebbens, G. L. 1972. Ecological distribution of centers of major adaptive radiations in angiosperms, pp. 7–34, in D. H. Valentine (ed.). Taxonomy, Phytogeography, and Evolution. Academic Press, New York.
Stebbens, G. L. and Major, J. 1965. Endemism and speciation in the California flora. Ecol. Monogr. 35:1–35.
Stewart, C. Jr., Kang, B. C., Kede, L., Mazourek, M., Moore, S. L., Yoo, E. Y., Kim, B. D., Paran, I., and Jahn, M. M. 2005. The Pun1 gene for pungency in pepper encodes a putative acyltransferase. Plant J. 42:675–688.
Suzuki, T. and Iwai, K. 1984. Constituents of red pepper species: chemistry, biochemistry, pharmacology, and food science of the pungent principle of capsicum species, pp. 227–299, in A. Brossi (ed.). The Alkaloids: Chemistry and Pharmacology. Academic Press, San Diego.
Suzuki, T., Fujiwake, H., and Iwai, K. 1980. Formation and metabolism of pungent principle of capsicum fruits. 5. Intracellular localization of capsaicin and its analogs, capsaicinoid, in capsicum fruit. 1. Microscopic investigation of the structure of the placenta of Capsicum annuum var. annuum. Plant Cell Physiol. 21:839–853.
Tewksbury, J. J. 2002. Fruits, frugivores and the evolutionary arms race. New Phytol. 156:137–139.
Tewksbury, J. J. and Nabhan, G. P. 2001. Directed deterrence by capsaicin in chillies. Nature 412:403–404.
Tewksbury, J. J., Nabhan, G. P., Norman, D., Susan, H., Tuxill, J., and Donovan, J. 1999. In situ conservation of wild chiles and their biotic associates. Conserv. Biol. 13:98–107.
Thompson, J. N. and Cunningham, B. M. 2002. Geographic structure and dynamics of coevolutionary selection. Nature 417:735–738.
Tong, N. and Bosland, P. W. 1999. Capsicum tovarii, a new member of the Capsicum baccatum complex. Euphytica 109:71–77.
Tsahar, E., Friedman, J., and Izhaki, I. 2002. Impact on fruit removal and seed predation of a secondary metabolite, emodin, in Rhamnus alaternus fruit pulp. Oikos 99:290–299.
Tsahar, E., Friedman, J., and Izhaki, I. 2003. Secondary metabolite emodin increases food assimilation efficiency of yellow-vented bulbuls (Pycnonotus xanthopygos). Auk 120:411–417.
Walsh, B. M. and Hoot, S. B. 2001. Phylogenetic relationships of Capsicum (Solanaceae) using DNA sequences from two noncoding regions: the chloroplast atpB–rbcL spacer region and nuclear waxy introns. Int. J. Plant Sci. 162:1409–1418.
Zangerl, A. R., Arntz, A. M., and Berenbaum, M. R. 1997. Physiological price of an induced chemical defense: photosynthesis, respiration, biosynthesis, and growth. Oecologia 109:433–441.
Acknowledgments
This research was made possible through grants from the National Science Foundation (DEB-0129168) and the National Geographic Society Committee for Research and Exploration (7190-02). We thank Paul Martin, Robert Dobbs, Ian Horn, Meribeth Huzinga, Alex Jahn, Uco Sapag, and Don Odon for assistance in the field. We thank Damian Rumiz, Andy Noss, and Natalia Araujo, as well as WCS Bolivia, Fundación Amigos de la Naturaleza, and Museo de Historia Natural “Noel Kempf Mercado” for logistic support. We thank two anonymous reviewers for helpful critiques of early versions of this manuscript.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Tewksbury, J.J., Manchego, C., Haak, D.C. et al. Where did the Chili Get its Spice? Biogeography of Capsaicinoid Production in Ancestral Wild Chili Species. J Chem Ecol 32, 547–564 (2006). https://doi.org/10.1007/s10886-005-9017-4
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10886-005-9017-4