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Polyploidy: a factor in the evolution of Dicerandra Benth. (Labiatae)

Published online by Cambridge University Press:  26 April 2010

R. B. Huck  and
H. L. Chambers
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Abstract

Chromosome counts are reported for the first time in Dicerandra Benth. (Labiatae), a genus endemic to the south-eastern United States. Representative taxa are tetraploid (n = 16) and hexaploid (n = 24). Diploids were not found. The systematic, phytogeographic and conservation implications of polyploidy in this genus are discussed. The monophyletic nature of the genus is upheld by the discovery that both sections have a presumed base number of x = 8. Hexaploidy has apparently evolved independently in all branches of sect. Dicerandra, but not in sect. Lecontea.

Keywords

ChromosomesDicerandraendemicLabiataepolyploidy
Type
Articles
Information
Edinburgh Journal of Botany , Volume 54 , Issue 2 , July 1997 , pp. 217 - 229
Copyright
Copyright © Trustees of the Royal Botanic Garden Edinburgh 1997

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References

REFERENCES

Austin, D. F., Posin, F. R. & Burch, J. N. (1987). Scrub species patterns on the Atlantic Coastal Ridge, Florida. J. Coastal Research 3: 491–498.Google Scholar
Bentham, G. (1848). Labiatae. In: De Candolle, A. (ed.) Prodromus Systematis Naturalis Regni Vegetabilis 12: 27–603. Paris: Victoria Masson.Google Scholar
Bentham, G. & Hooker, J. D. (1876). Genera Plantarum, Vol.11. London: Williams and Norgate.Google Scholar
Briggs, D. & Walters, S. M. (1984). Plant Variation and Evolution. Ed. 2. Cambridge: Cambridge University Press.Google Scholar
Cantino, P. D. & Sanders, R. W. (1986). Subfamilial classification of Labiatae. Syst. Bot. 11: 163–185.Google Scholar
Chambers, H. L. (1961). Chromosome numbers of breeding systems in Pycnanthemum (Labiatae). Brittonia 13: 116–128.Google Scholar
Chambers, H. L. & Chambers, K. L. (1971). Artificial and natural hybrids in Pycnanthemum (Labiatae). Brittonia 23: 71–88.Google Scholar
Chambers, H. L. & Hummer, K. E. (1994). Chromosome counts in the Mentha collection at the USDA-ARS National Clonal Germplasm Repository. Taxon 43: 423–432.Google Scholar
Christman, S. P. & Judd, W. S. (1990). Notes on plants endemic to Florida scrub. Florida Sci. 53: 52–73.Google Scholar
Cooke, C. W. (1939). Scenery of Florida interpreted by a geologist. Geological Bulletin No. 17. Tallahassee: Florida Geological Survey.Google Scholar
De Wet, J. M. J. (1975). On O Winge and a Prayer: the origin of polyploids. Bot. Rev. 41: 361–390.Google Scholar
Eisner, T., Mccormick, K. D., Skaion, M., Eisner, M., Smedley, S. R., Aneshansley, D. J., Deyrup, M., Myers, R. L. & Mienwald, J. (1990). Chemical defenses of a rare mint plant. Chemoecology 1: 30–37.Google Scholar
Fedorov, A. (ed.) (1969). Chromosome numbers of flowering plants. Komarov Botanical Institute: St Petersburg.Google Scholar
Gill, L. S. (1981). Chromosomal evidence and incidence of polyploidy in the Canadian Labiatae. Rev. Cytol. Biol. Veg. Botaniste 4: 331–339.Google Scholar
Goldblatt, P. & Johnson, D. E. (eds) (1994). Lamiaceae in Index to Plant Chromosome Numbers 1990–1991. Monographs in Systematic Bot. {Missouri Bot. Garden) 51: 115–121.Google Scholar
Gray, T. C. (1965). A monograph of the genus Conradina A. Gray (Labiatae). Ph.D. thesis, Vanderbilt University.Google Scholar
Harley, R. M. & Brighton, C. A. (1977). Chromosome numbers in the genus Mentha. Bot. J. Linn. Soc. 74: 71–96.Google Scholar
Harley, R. M. & Heywood, C. A. (1992). Chromosome numbers in Tropical American Labiatae. In: Harley, R. M. & Reynolds, T. (eds) Advances in Labiate Science, pp. 211–246. Kew: Royal Botanic Gardens.Google Scholar
Hedge, I. C. (1992). A global survey of the biogeography of the Labiatae. In: Harley, R. M. & Reynolds, T. (eds) Advances in Labiate Science, pp. 7–17. Kew: Royal Botanic Gardens.Google Scholar
Huck, R. B. (1987). Dicerandra. Phanerogamarum Monographiae 19. Berlin-Stuttgart: J. Cramer.Google Scholar
Huck, R. B. (1992). Overview of pollination biology in the Lamiaceae. In: Harley, R. M. & Reynolds, T. (eds) Advances in Labiate Science, pp. 167–181. Kew: Royal Botanic Gardens.Google Scholar
Huck, R. B., Judd, W. S., Whitten, W. M., Skean, J. D. Jr., Wunderlin, R. P. & Delaney, K. R. (1989). A new Dicerandra (Labiatae) from the Lake Wales Ridge of Florida with cladistic analysis and discussion of endemism. Syst. Bot. 14: 197–213.Google Scholar
Irving, R. S. (1976). Chromosome numbers in Hedeoma (Labiatae) and related genera. Syst. Bot. 1: 46–56.Google Scholar
Jones, R. N. (1995). Tansley Review No. 85. B chromosomes in plants. New Phytol. 131:411–434.Google Scholar
Kral, R. (1982). Some notes on Dicerandra (Lamiaceae). Sida 9: 238–262.Google Scholar
Kruckeberg, A. R. & Rabinowitz, D. (1985). Biological aspects of endemism in higher plants. Ann. Rev. Ecol. Syst. 16: 447–479.Google Scholar
Lewis, P. O. & Crawford, D. J. (1995). Pleistocene refugium endemics exhibit greater allozyme diversity than widespread congeners in the genus Polygonella (Polygonaceae). Amer. J. Bot. 82: 141–149.Google Scholar
Marrero, A. (1992). Chromosomal evolutionary trends in the genus Sideritis subgenus marrubiastrum. In: Harley, R. M. & Reynolds, T. (eds) Advances in Labiate Science, pp. 247–256. Kew: Royal Botanic Gardens.Google Scholar
Mccormick, K. D., Deyrup, M. A., Menges, E. S., Wallace, S. R., Meinwald, J. & Eisner, T. (1993). Relevance of chemistry to conservation of isolated populations: The case of volatile leaf components of Dicerandra mints. Proc. Nad Acad. Sci. USA 90: 7701–7705.Google Scholar
Mcdonald, D. B. & Hamrick, J. L. (1996). Genetic variation in some plants of Florida Scrub. Amer. J. Bot. 83: 21–27.Google Scholar
Neill, W. T. (1957). Historical biogeography of present-day Florida. Bull. Fla. State Mus. 2: 175–221.Google Scholar
Snow, R. (1963). Alcoholic hydrochloric acid-carmine as a stain for chromosomes in squash preparations. Stain Tech. 28: 9–13.Google Scholar
Stebbins, G. L. (1971). Chromosomal Evolution in Higher Plants. London: Addison-Wesley.Google Scholar
Tanner, W. F. (1992). Natural environment. In: Fernald, E. A. & Purdum, E. D. (eds) Atlas of Florida, pp. 12–77. Gainesville: University Presses of Florida.Google Scholar
Thorne, R. F. (1993). Phytogeography. In: FLORA OF NORTH AMERICA EDITORIAL COMMITTEE (eds) Flora of North America Vol. 1, pp. 132–153. New York: Oxford University Press.Google Scholar
Watts, W. A. (1983). Vegetation history of the Eastern United States 25,000 to 10,000 years ago. In: Porter, S. C. (ed.) Late-Quaternary Environments of the United States, The Late Pleistocene, Vol. 1, pp. 294–310. Minneapolis: University of Minnesota Press.Google Scholar
Webb, S. D. (1990). Historical biogeography. In: Myers, R. L. & Ewel, J. J. (eds) Ecosystems of Florida, pp. 70–100. Orlando: University of Central Florida Press.Google Scholar
White, W. A. (1970). Geomorphology of the Florida Peninsula. Geological Bulletin No. 51. Tallahassee: Florida Bureau of Geology, Depart. Nat. Res.Google Scholar