Abstract
Cardamine occulta, recently reported also as 'Asian C. flexuosa', is originally a native East Asian weed of paddy fields and other open habitats. It has been recorded throughout the world and is now also spreading widely in Europe. However, how this species differs morphologically from European C. flexuosa and its closest relatives in Asia (C. kokaiensis and C. scutata) is not fully known, particularly because it became widely recognized as a new taxon only recently. We used chromosome counting and flow cytometry to determine ploidies and genome size variation in these four species and morphometric analyses to ascertain their morphological differentiation. A uniformly octoploid level (2n = 64) is confirmed here for C. occulta and a tetraploid level for C. flexuosa and C. scutata (2n = 32). Here we formally describe C. kokaiensis, which is restricted to East Asia (Japan, Honshu; eastern China, Zhejiang Province; perhaps also the Russian Far East) and determine it to be a tetraploid. Considerable differences in monoploid genome size were revealed between these taxa, suggesting their mostly allopolyploid origins. Morphological differences between the species are demonstrated, and detailed morphological descriptions and an identification key are provided.
| Original language | English |
|---|---|
| Pages (from-to) | 456-482 |
| Number of pages | 27 |
| Journal | Botanical Journal of the Linnean Society |
| Volume | 187 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - Jun 26 2018 |
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All Science Journal Classification (ASJC) codes
- Ecology, Evolution, Behavior and Systematics
- Plant Science
Cite this
Morphology and genome size of the widespread weed Cardamine occulta : How it differs from cleistogamic C. kokaiensis and other closely related taxa in Europe and Asia. / Šlenker, Marek; Zozomová-Lihová, Judita; Mandáková, Terezie; Kudoh, Hiroshi; Zhao, Yunpeng; Soejima, Akiko; Yahara, Tetsukazu; Skokanová, Katarína; Španiel, Stanislav; Fls, Karol Marhold.
In: Botanical Journal of the Linnean Society, Vol. 187, No. 3, 26.06.2018, p. 456-482.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Morphology and genome size of the widespread weed Cardamine occulta
T2 - How it differs from cleistogamic C. kokaiensis and other closely related taxa in Europe and Asia
AU - Šlenker, Marek
AU - Zozomová-Lihová, Judita
AU - Mandáková, Terezie
AU - Kudoh, Hiroshi
AU - Zhao, Yunpeng
AU - Soejima, Akiko
AU - Yahara, Tetsukazu
AU - Skokanová, Katarína
AU - Španiel, Stanislav
AU - Fls, Karol Marhold
PY - 2018/6/26
Y1 - 2018/6/26
N2 - Cardamine occulta, recently reported also as 'Asian C. flexuosa', is originally a native East Asian weed of paddy fields and other open habitats. It has been recorded throughout the world and is now also spreading widely in Europe. However, how this species differs morphologically from European C. flexuosa and its closest relatives in Asia (C. kokaiensis and C. scutata) is not fully known, particularly because it became widely recognized as a new taxon only recently. We used chromosome counting and flow cytometry to determine ploidies and genome size variation in these four species and morphometric analyses to ascertain their morphological differentiation. A uniformly octoploid level (2n = 64) is confirmed here for C. occulta and a tetraploid level for C. flexuosa and C. scutata (2n = 32). Here we formally describe C. kokaiensis, which is restricted to East Asia (Japan, Honshu; eastern China, Zhejiang Province; perhaps also the Russian Far East) and determine it to be a tetraploid. Considerable differences in monoploid genome size were revealed between these taxa, suggesting their mostly allopolyploid origins. Morphological differences between the species are demonstrated, and detailed morphological descriptions and an identification key are provided.
AB - Cardamine occulta, recently reported also as 'Asian C. flexuosa', is originally a native East Asian weed of paddy fields and other open habitats. It has been recorded throughout the world and is now also spreading widely in Europe. However, how this species differs morphologically from European C. flexuosa and its closest relatives in Asia (C. kokaiensis and C. scutata) is not fully known, particularly because it became widely recognized as a new taxon only recently. We used chromosome counting and flow cytometry to determine ploidies and genome size variation in these four species and morphometric analyses to ascertain their morphological differentiation. A uniformly octoploid level (2n = 64) is confirmed here for C. occulta and a tetraploid level for C. flexuosa and C. scutata (2n = 32). Here we formally describe C. kokaiensis, which is restricted to East Asia (Japan, Honshu; eastern China, Zhejiang Province; perhaps also the Russian Far East) and determine it to be a tetraploid. Considerable differences in monoploid genome size were revealed between these taxa, suggesting their mostly allopolyploid origins. Morphological differences between the species are demonstrated, and detailed morphological descriptions and an identification key are provided.
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UR - http://www.scopus.com/inward/citedby.url?scp=85050181199&partnerID=8YFLogxK
U2 - 10.1093/botlinnean/boy030
DO - 10.1093/botlinnean/boy030
M3 - Article
VL - 187
SP - 456
EP - 482
JO - Botanical Journal of the Linnean Society
JF - Botanical Journal of the Linnean Society
SN - 0024-4074
IS - 3
ER -