Advanced

An allozyme study of sexual and vegetative regeneration in Hieracium pilosella L.

Bruun, Hans Henrik LU ; Scheepens, J.F. and Tyler, Torbjörn LU (2007) In Canadian Journal of Botany 85(1). p.10-15
Abstract (Swedish)
Abstract in French

Afin d’évaluer l’importance relative de la reproduction sexuelle et végétative dans les populations d’une plante de prairie, l’Hieracium pilosella L., les auteurs ont utilisé des marqueurs allozymiques permettant d’en identifier les clones. Les études conduites aux champs, sur les populations d’espèces de plantes clonales, ont souvent fait état de recrutement absent ou négligeable, à partir de semences. Au contraire, l’étude de marqueurs génétiques montrent une diversité clonale substantielle dans les populations, ce qui suggère le recrutement de nouveaux genets, dans les populations établies. Les auteurs ont observé que l’H. pilosella se régénère à partir de graines, à la fois dans et entre les denses... (More)
Abstract in French

Afin d’évaluer l’importance relative de la reproduction sexuelle et végétative dans les populations d’une plante de prairie, l’Hieracium pilosella L., les auteurs ont utilisé des marqueurs allozymiques permettant d’en identifier les clones. Les études conduites aux champs, sur les populations d’espèces de plantes clonales, ont souvent fait état de recrutement absent ou négligeable, à partir de semences. Au contraire, l’étude de marqueurs génétiques montrent une diversité clonale substantielle dans les populations, ce qui suggère le recrutement de nouveaux genets, dans les populations établies. Les auteurs ont observé que l’H. pilosella se régénère à partir de graines, à la fois dans et entre les denses colonies clonales. Ils ont échantillonné deux sites, différents par leurs conditions environnementales, afin d’examiner comment la balance entre les recrutements dérivés de graines et de stolons, se modifient selon les stress biotiques et abiotiques. Sur le site relativement sensible à la sécheresse, soit une pente exposée au sud, la balance se déplace en faveur du recrutement par graines, comparativement au site mésique où la régénération végétative est plus importante. (Less)
Abstract
Allozyme markers were used to fingerprint clones of the grassland plant Hieracium pilosella and, by inference, to estimate the relative importance of sexual and vegetative reproduction in a population. Field studies in populations of clonal plant species have often reported negligible or absent recruitment from seed. In contrast, studies of genetic markers have found substantial clonal diversity in populations, suggesting recruitment of new genets into established populations. Our results showed that H. pilosella regenerates from seed both within and between dense clonal patches. Two sites differing in environmental conditions were sampled in order to investigate how the balance between seed-derived and stolon-derived recruitment changes... (More)
Allozyme markers were used to fingerprint clones of the grassland plant Hieracium pilosella and, by inference, to estimate the relative importance of sexual and vegetative reproduction in a population. Field studies in populations of clonal plant species have often reported negligible or absent recruitment from seed. In contrast, studies of genetic markers have found substantial clonal diversity in populations, suggesting recruitment of new genets into established populations. Our results showed that H. pilosella regenerates from seed both within and between dense clonal patches. Two sites differing in environmental conditions were sampled in order to investigate how the balance between seed-derived and stolon-derived recruitment changes with biotic and abiotic stress. In a relatively drought-prone site on a south-facing slope, the balance was shifted towards recruitment from seed, compared to a mesic site in which vegetative regeneration was more important. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
apomixis, clonal diversity, population, recruitment, vegetative regeneration
in
Canadian Journal of Botany
volume
85
issue
1
pages
10 - 15
publisher
NRC Research Press
external identifiers
  • wos:000246157000002
  • scopus:34249342234
ISSN
0008-4026
DOI
10.1139/B06-140
language
English
LU publication?
yes
id
bd4b625d-2134-44d8-8cca-61ff31c45657 (old id 636263)
date added to LUP
2007-12-04 14:31:29
date last changed
2017-01-01 04:48:06
@article{bd4b625d-2134-44d8-8cca-61ff31c45657,
  abstract     = {Allozyme markers were used to fingerprint clones of the grassland plant Hieracium pilosella and, by inference, to estimate the relative importance of sexual and vegetative reproduction in a population. Field studies in populations of clonal plant species have often reported negligible or absent recruitment from seed. In contrast, studies of genetic markers have found substantial clonal diversity in populations, suggesting recruitment of new genets into established populations. Our results showed that H. pilosella regenerates from seed both within and between dense clonal patches. Two sites differing in environmental conditions were sampled in order to investigate how the balance between seed-derived and stolon-derived recruitment changes with biotic and abiotic stress. In a relatively drought-prone site on a south-facing slope, the balance was shifted towards recruitment from seed, compared to a mesic site in which vegetative regeneration was more important.},
  author       = {Bruun, Hans Henrik and Scheepens, J.F. and Tyler, Torbjörn},
  issn         = {0008-4026},
  keyword      = {apomixis,clonal diversity,population,recruitment,vegetative regeneration},
  language     = {eng},
  number       = {1},
  pages        = {10--15},
  publisher    = {NRC Research Press},
  series       = {Canadian Journal of Botany},
  title        = {An allozyme study of sexual and vegetative regeneration in Hieracium pilosella L.},
  url          = {http://dx.doi.org/10.1139/B06-140},
  volume       = {85},
  year         = {2007},
}