Abstract
Due to its instantaneous effects on the genetics, phenotype, physiology and/or ecology of a plant, polyploidy can play an important role in facilitating plant invasions. Understanding the determinants of invasiveness in species with multiple ploidy levels requires a detailed knowledge of ploidy composition in native versus invaded ranges. Using DNA flow cytometry, we performed representative ploidy screening (277 localities, 333 individuals) across the native range of Oxalis pes-caprae and compared the data with those from invaded ranges. Both ranges showed striking differences in ploidy composition: whereas tetra- and especially pentaploids successfully colonized secondary areas, only di-, (very rare) tri- and tetraploids (dominant) were found in the native range of this species. Disregarding the diploid var. sericea, diploids and tetraploids of the nominate variety showed largely parapatric distribution in the native range, with a zone of overlap in the Northern Cape Province. Our results challenge the conventional scenario of the introduction of pentaploid individuals from the Greater Cape Floristic Region. The origin of the pentaploid cytotype is unclear and molecular tools applied in a large scale screening are needed to understand the invasion history of the species.
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References
Born J, Linder HP, Desmet P (2007) The greater cape floristic region. J Biogeogr 34:147–162
Castro S, Loureiro J, Santos C, Ater M, Ayensa G, Navarro L (2007) Distribution of flower morphs, ploidy level and sexual reproduction of the invasive weed Oxalis pes-caprae in the western area of the Mediterranean region. Ann Bot 99:507–517
Castro S, Loureiro J, Sousa AJ, Rodriguez E, Santos C, Ayensa G, Navarro L (2009) Is the heterostylous Oxalis pes-caprae able to reproduce sexually in the invasive range? In: Proceedings of the world conference on biological invasions and ecosystem functioning, 27–30 Oct 2009, Porto, Portugal
Doležel J, Greilhuber J, Suda J (2007) Estimation of nuclear DNA content in plants using flow cytometry. Nat Prot 2:2233–2244
Goldblatt P, Manning J (2000) Cape plants. A conspectus of the Cape Flora of South Africa. Strelitzia 9. SANBI, Pretoria, South Africa
Hull-Sanders HM, Johnson RH, Owen HA, Meyer GA (2009) Effects of polyploidy on secondary chemistry, physiology, and performance of native and invasive genotypes of Solidago gigantea (Asteraceae). Am J Bot 96:762–770
Kubátová B, Trávníček P, Bastlová D, Čurn V, Jarolímová V, Suda J (2008) DNA ploidy-level variation in native and invasive populations of Lythrum salicaria at a large geographical scale. J Biogeogr 35:167–176
Lambdon P (2006) Oxalis pes-caprae. DAISIE factsheet (Delivering Alien Invasive Species Inventories for Europe). http://www.europe-aliens.org/pdf/Oxalis_pes-caprae.pdf. Accessed 19 Oct 2012
Levin DA (2002) The role of chromosomal change in plant evolution. Oxford University Press, Oxford
Mandák B, Pyšek P, Lysák M, Suda J, Krahulcová A, Bímová K (2003) Variation in DNA-ploidy levels of Reynoutria taxa in the Czech Republic. Ann Bot 92:265–272
Manning J, Goldblatt P, Snijman D (2002) The color encyclopedia of Cape bulbs. Timber Press, Portland
Marks GE (1956) Chromosome numbers in the genus Oxalis. New Phytol 55:120–129
Michael P (1964) The identity and origin of varieties of Oxalis pes-caprae L. naturalized in Australia. Trans R Soc S Aust 88:167–173
Mucina L, Rutherford MC, eds (2006) The vegetation of South Africa, Lesotho and Swaziland. Strelitzia 19. SANBI, Pretoria, South Africa
Ornduff R (1987) Reproductive systems and chromosome races of Oxalis pes-caprae L. and their bearing on the genesis of a noxious weed. Ann Mo Bot Gard 74:79–84
Pandit MK, Pocock MJO, Kunin WE (2011) Ploidy influences rarity and invasiveness in plants. J Ecol 99:1108–1115
Ramsey J, Schemske DW (2002) Neopolyploidy in flowering plants. Annu Rev Ecol Syst 33:589–639
Salter TM (1944) The genus Oxalis in South Africa—a taxonomic revision. J S Afr Bot Suppl 1:1–355
Schlaepfer DR, Edwards P, Billeter R (2010) Why only tetraploid Solidago gigantea (Asteraceae) became invasive: a common garden comparison of ploidy levels. Oecologia 163:661–673
te Beest M, Le Roux JJ, Richardson DM, Brysting AK, Suda J, Kubešová M, Pyšek P (2012) The more the better? The role of polyploidy in facilitating plant invasions. Ann Bot 53:19–45
Acknowledgments
We thank our colleagues who helped us in the field, namely T. Fér, F. Kolář, J. Krejčík, M. Lučanová, P. Trávníček, T. Urfus, P. Vít, and E. Záveská. Jan Wild (Průhonice) kindly prepared a distributional map. Western Cape Nature Conservation Board and Department of Environment and Nature Conservation, Northern Cape are thanked for issuing collection and transport permits (nos. AAA008-00017-0028, AAA005-00176-0028, ODB 669 2011 FLORA 033 2011, ODB 670 2011 FLORA 034 2011, ODB 1792 2011 FLORA 077 2011, ODB 410 2012 FLORA 019 2012, and ODB 411 2012 FLORA 020 2012). The work was supported by the Czech Science Foundation (project P506/10/0643). Additional support was provided by the Grant Agency of the Charles University (project no. 410111), Academy of Science of the Czech Republic (long-term research development project no. RVO 67985939) and institutional resources of Ministry of Education, Youth and Sports of the Czech Republic for the support of science and research.
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Krejčíková, J., Sudová, R., Oberlander, K.C. et al. Cytogeography of Oxalis pes-caprae in its native range: where are the pentaploids?. Biol Invasions 15, 1189–1194 (2013). https://doi.org/10.1007/s10530-012-0370-2
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DOI: https://doi.org/10.1007/s10530-012-0370-2