Morphometric studies of polyploid Cardamine species (Brassicaceae) from Japan: solving a long-standing taxonomic and nomenclatural controversy
Judita Lihová A D , Hiroshi Kudoh B and Karol Marhold A CA Institute of Botany, Slovak Academy of Sciences, Dúbravská cesta 9, SK-845 23, Bratislava, Slovakia.
B Center for Ecological Research, Kyoto University, Hirano 2-509-3, Otsu 520-2113, Japan.
C Charles University in Prague, Faculty of Science, Department of Botany, Benátská 2, CZ-128 01, Praha 2, Czech Republic.
D Corresponding author. Email: judita.lihova@savba.sk
Australian Systematic Botany 23(2) 94-111 https://doi.org/10.1071/SB09038
Submitted: 18 August 2009 Accepted: 1 February 2010 Published: 31 May 2010
Abstract
Polyploidy is an important evolutionary mechanism and speciation mode in plants; however, delimitation of species boundaries in polyploid complexes is often a difficult task. In the present paper, we explore morphological variation in a group of East Asian Cardamine polyploids that have long been shrouded in taxonomic and nomenclatural confusion. We relate the present morphometric data of 41 sampled populations with recently published ploidy-level data, and propose a revised taxonomic treatment, including the designation of several lectotypes. The following species are recognised in Japan: C. schinziana O.E.Schulz (2n = 6x, 8x), C. torrentis Nakai (2n = 8x), C. valida (Takeda) Nakai (2n = 4x) and C. yezoensis Maxim. (2n = 6x−12x). C. amariformis Nakai (2n = 4x) from Korea is also discussed, although it may be conspecific with C. valida, pending further studies. Distribution of these taxa in the Japanese Archipelago is characterised, including comments on their occurrence outside of Japan.
Acknowledgements
This research was financially supported by the Slovak Research and Development Agency (APVV; Project No. RPEU-0003-06 to K. M.); by the Ministry of Education, Youth and Sports of the Czech Republic (Grant No. 0021620828 to K.M.); by the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan (Grant-in-Aid for Scientific Research of Priority Areas ‘Genome Barriers in Plant Reproduction’ 19043010 to H. K and Global COE Program A06 of Kyoto University); and by the exchange program of the Japan Society for the Promotion of Science and Slovak Academy of Sciences. Our sincere thanks go to the directors and curators of the cited herbaria for giving us access to herbarium specimens; to Hidetoshi Kato (Tokyo), Jae-Hong Pak, Cho Seong-ho, and Lee Don-hwa (Daegu) for their considerable help with plant sampling in the field; and to Zlata Komárová (Bratislava) for drawings of plants.
Andrés-Sánchez S,
Rico E,
Herrero A,
Santos-Vicente M, Martínez-Ortega MM
(2009) Combining traditional morphometrics and molecular markers in cryptic taxa: towards and updated integrative taxonomic treatment for Veronica subgenus Pentasepalae (Plantaginaceae sensu APG II) in the western Mediterranean. Botanical Journal of the Linnean Society 159, 68–87.
| Crossref | GoogleScholarGoogle Scholar |
[verified January 2010].
Joly S,
Starr JR,
Lewis WH, Bruneau A
(2006) Polyploid and hybrid evolution in roses east of the Rocky Mountains. American Journal of Botany 93, 412–425.
| Crossref | GoogleScholarGoogle Scholar |
[verified January 2010].
Kurosawa S
(1981) Notes on chromosome numbers of Spermatophytes (3). Journal of Japanese Botany 56, 245–251.
[verified January 2010].
Nakai T
(1912) Notulae ad plantas Japoniae et Coreae VIII. The Botanical Magazine (Tokyo) 26, 321–328.
Nelson AD, Elisens WJ
(1999) Polyploid evolution and biogeography in Chelone (Scrophulariaceae): morphological and isozyme evidence. American Journal of Botany 86, 1487–1501.
| Crossref | GoogleScholarGoogle Scholar |
CAS |
PubMed |
Nishikawa T
(1986) Chromosome counts of flowering plants of Hokkaido (10). Journal of Hokkaido University of Education [Section II B] 37, 5–17.
Nybom H,
Esselink GD,
Werlemark G, Vosman B
(2004) Microsatellite DNA marker inheritance indicates preferential pairing between two highly homologous genomes in polyploid and hemisexual dog-roses, Rosa L. Sect. Caninae DC. Heredity 92, 139–150.
| Crossref | GoogleScholarGoogle Scholar |
CAS |
PubMed |
Probatova NS, Sokolovskaya AP
(1988) Chisla khromosom sosudistykh rastenii iz Primorskogo kraya, Priamur’ya, Severnoi Koryakii, Kamchatki i Sakhalina. [Chromosome numbers in vascular plants from Primorye territory, the Amur river basin, North Koryakia, Kamchatka and Sakhalin.] Botanicheskii Zhurnal 73, 290–293.
Rudyka EG
(1984) Chisla khromosom sosudistykh rastenii iz yuzhnoi chasti Sovetskogo Dal’nego Vostoka. [Chromosome numbers in vascular plants from the southern part of the Soviet Far East.] Botanicheskii Zhurnal 69, 1699–1700.
Schols P,
Dessein S,
D‘hondt C,
Huysmans S, Smets E
(2002) Carnoy, a new digital measurements tool for palynology. Grana 41, 124–126.
| Crossref | GoogleScholarGoogle Scholar |
Schulz OE
(1903) Monographie der Gattung Cardamine. Botanische Jahrbücher für Systematik, Pflanzengeschichte und Pflanzengeographie 32, 280–623.
Sokolovskaya AP
(1960) Geograficheskoe rasprostranenie poliploidnykh vidov rastenii (Issledovanie flory o. Sakhalina). Vestnik Leningradskogo Universiteta 1960(21), 42–58.
Soltis DE,
Soltis PS,
Schemske DW,
Hancock JF,
Thompson JN,
Husband BC, Judd WS
(2007) Autopolyploidy in angiosperms: have we grossly underestimated the number of species? Taxon 56, 13–30.
| Crossref |
Soltis DE,
Albert VA,
Leebens-Mack J,
Bell CD,
Paterson AH,
Zheng C,
Sankoff D,
dePamphilis CW,
Kerr Wall P, Soltis PS
(2009) Polyploidy and angiosperm diversification. American Journal of Botany 96, 336–348.
| Crossref | GoogleScholarGoogle Scholar |
Suda J
(2002) Sympatric occurrences of various cytotypes of Vaccinium sect. Oxycoccus (Ericaceae). Nordic Journal of Botany 22, 593–601.
| Crossref | GoogleScholarGoogle Scholar |
Suda J,
Krahulcová A,
Trávníček P, Krahulec F
(2006) Ploidy level versus DNA ploidy level: an appeal for consistent terminology. Taxon 55, 447–450.
| Crossref |
Tatewaki M
(1954) Disjunct distribution of the flowering plants in Hokkaido, Japan. Bulletin of the Society of Plant Ecology [In Japanese with English summary] 3, 250–270.
Thompson IR
(1996) A revision of the Cardamine paucijuga complex (Brassicaceae). Muelleria 9, 161–173.
Thompson IR, Ladiges PY
(1996) A revision of the Cardamine gunnii–lilacina complex (Brassicaceae). Muelleria 9, 145–159.
|
CAS |
Thorpe RS
(1976) Biometric analysis of geographic variation and racial varieties. Biological Reviews of the Cambridge Philosophical Society 51, 407–452.
| Crossref | GoogleScholarGoogle Scholar |
CAS |
PubMed |
Urbanska-Worytkiewicz K, Landolt E
(1974) Biosystematic investigations in Cardamine pratensis L. s.l. I. Diploid taxa in central Europe and their fertility relationships. Berichte des Geobotanischen Institutes der ETH. Stiftung Rübel 42, 42–139.
Vegter IH
(1988) Index herbariorum. Part II (7), collectors T t/m Z. Regnum Vegetabile 117, 987–1213.
Yamaji H,
Fukuda T,
Yokoyama J,
Pak J-H,
Zhou Ch-Z,
Yang Ch-S,
Kondo K,
Morota T,
Takeda S,
Sasaki H, Maki M
(2007) Reticulate evolution and phylogeography in Asarum sect. Asiasarum (Aristolochiaceae) documented in internal transcribed spacer sequences (ITS) of nuclear ribosomal DNA. Molecular Phylogenetics and Evolution 44, 863–884.
| Crossref | GoogleScholarGoogle Scholar |
CAS |
PubMed |
|
