Advanced

Genetic diversity within and genetic differentiation between blooms of a microalgal species.

Lebret, Karen LU ; Kritzberg, Emma LU ; Figueroa, Rosa LU and Rengefors, Karin LU (2012) In Environmental Microbiology 14(9). p.2395-2404
Abstract
The field of genetic diversity in protists, particularly phytoplankton, is under expansion. However, little is known regarding variation in genetic diversity within populations over time. The aim of our study was to investigate intrapopulation genetic diversity and genetic differentiation in the freshwater bloom-forming microalga Gonyostomum semen (Raphidophyceae). The study covered a 2-year period including all phases of the bloom. Amplified fragment length polymorphism (AFLP) was used to determine the genetic structure and diversity of the population. Our results showed a significant differentiation between samples collected during the two blooms from consecutive years. Also, an increase of gene diversity and a loss of differentiation... (More)
The field of genetic diversity in protists, particularly phytoplankton, is under expansion. However, little is known regarding variation in genetic diversity within populations over time. The aim of our study was to investigate intrapopulation genetic diversity and genetic differentiation in the freshwater bloom-forming microalga Gonyostomum semen (Raphidophyceae). The study covered a 2-year period including all phases of the bloom. Amplified fragment length polymorphism (AFLP) was used to determine the genetic structure and diversity of the population. Our results showed a significant differentiation between samples collected during the two blooms from consecutive years. Also, an increase of gene diversity and a loss of differentiation among sampling dates were observed over time within a single bloom. The latter observations may reflect the continuous germination of cysts from the sediment. The life cycle characteristics of G. semen, particularly reproduction and recruitment, most likely explain a high proportion of the observed variation. This study highlights the importance of the life cycle for the intraspecific genetic diversity of microbial species, which alternates between sexual and asexual reproduction. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Environmental Microbiology
volume
14
issue
9
pages
2395 - 2404
publisher
Wiley-Blackwell
external identifiers
  • wos:000308300600012
  • pmid:22568551
  • scopus:84865779908
ISSN
1462-2920
DOI
10.1111/j.1462-2920.2012.02769.x
project
BECC
language
English
LU publication?
yes
id
f92aeb74-d09a-4ab5-b451-6da5f924e303 (old id 2609008)
date added to LUP
2012-06-11 14:28:05
date last changed
2017-10-29 03:18:39
@article{f92aeb74-d09a-4ab5-b451-6da5f924e303,
  abstract     = {The field of genetic diversity in protists, particularly phytoplankton, is under expansion. However, little is known regarding variation in genetic diversity within populations over time. The aim of our study was to investigate intrapopulation genetic diversity and genetic differentiation in the freshwater bloom-forming microalga Gonyostomum semen (Raphidophyceae). The study covered a 2-year period including all phases of the bloom. Amplified fragment length polymorphism (AFLP) was used to determine the genetic structure and diversity of the population. Our results showed a significant differentiation between samples collected during the two blooms from consecutive years. Also, an increase of gene diversity and a loss of differentiation among sampling dates were observed over time within a single bloom. The latter observations may reflect the continuous germination of cysts from the sediment. The life cycle characteristics of G. semen, particularly reproduction and recruitment, most likely explain a high proportion of the observed variation. This study highlights the importance of the life cycle for the intraspecific genetic diversity of microbial species, which alternates between sexual and asexual reproduction.},
  author       = {Lebret, Karen and Kritzberg, Emma and Figueroa, Rosa and Rengefors, Karin},
  issn         = {1462-2920},
  language     = {eng},
  number       = {9},
  pages        = {2395--2404},
  publisher    = {Wiley-Blackwell},
  series       = {Environmental Microbiology},
  title        = {Genetic diversity within and genetic differentiation between blooms of a microalgal species.},
  url          = {http://dx.doi.org/10.1111/j.1462-2920.2012.02769.x},
  volume       = {14},
  year         = {2012},
}