uu.seUppsala universitets publikasjoner
Endre søk
RefereraExporteraLink to record
Permanent link

Direct link
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Tetraploids do not form cushions: association of ploidy level, growth form and ecology in the High Arctic Saxifraga oppositifolia L. s. lat. (Saxifragaceae) in Svalbard
Vise andre og tillknytning
2013 (engelsk)Inngår i: Polar Research, ISSN 0800-0395, E-ISSN 1751-8369, Vol. 32, s. UNSP 20071-Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Saxifraga oppositifolia L. is a common circumpolar plant species that displays considerable morphological and genetic variation throughout its range. It is mainly diploid, but tetraploids are reported from several regions. The growth form varies from prostate to cushion-shaped, and the plant thrives in wet snow beds as well as on dry ridges. This variation has triggered the curiosity of many researchers, but as yet, no one has explained the observed morphological variation using ecological and/or genetic factors. However, the ploidy level has rarely been taken into account. This is the first study that demonstrates a significant correlation between ploidy level, ecology and growth form in S. oppositifolia. We successfully analysed 193 individuals of S. oppositifolia from 15 locations in Svalbard to investigate possible relationships among growth forms (prostrate, intermediate and cushion), ecological factors (vegetation and soil characteristics) and ploidy level. Results from flow cytometry reported 106 diploids, eight triploids and 79 tetraploids. Tetraploids almost exclusively showed prostrate growth, while the diploids displayed all three growth forms, evidence that growth form is at least partly genetically determined. Our analyses of environmental and vegetation data in relation to ploidy level indicated overlapping niches, but the tetraploids showed a narrower niche, and one shifted towards more benign habitats characterized by higher pH, higher soil temperatures and higher cover of vascular plants. The latter may suggest that tetraploids are slightly better competitors, but less hardy. Thus, autopolyploidy in S. oppositifolia has expanded the ecological amplitude of this species complex.

sted, utgiver, år, opplag, sider
2013. Vol. 32, s. UNSP 20071-
Emneord [en]
Autopolyploidy, flow cytometry, morphotypes, habitat segregation, purple saxifrage
HSV kategori
Identifikatorer
URN: urn:nbn:se:uu:diva-203697DOI: 10.3402/polar.v32i0.20071ISI: 000320106000001OAI: oai:DiVA.org:uu-203697DiVA, id: diva2:637347
Tilgjengelig fra: 2013-07-17 Laget: 2013-07-17 Sist oppdatert: 2017-12-06bibliografisk kontrollert

Open Access i DiVA

fulltext(1112 kB)210 nedlastinger
Filinformasjon
Fil FULLTEXT01.pdfFilstørrelse 1112 kBChecksum SHA-512
8082483c82f3aedf65374f1fd1f96141ae215e365038594ead45a51b6ce75ed0c4b6a5c2be138d95726904ee00bdb002fcf3c14e16b8a48d753ad7af3db63c9f
Type fulltextMimetype application/pdf

Andre lenker

Forlagets fulltekst

Personposter BETA

Postma, Froukje

Søk i DiVA

Av forfatter/redaktør
Postma, Froukje
Av organisasjonen
I samme tidsskrift
Polar Research

Søk utenfor DiVA

GoogleGoogle Scholar
Totalt: 210 nedlastinger
Antall nedlastinger er summen av alle nedlastinger av alle fulltekster. Det kan for eksempel være tidligere versjoner som er ikke lenger tilgjengelige

doi
urn-nbn

Altmetric

doi
urn-nbn
Totalt: 523 treff
RefereraExporteraLink to record
Permanent link

Direct link
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf