High Diversity of Microcystin Chemotypes within a Summer Bloom of the Cyanobacterium Microcystis botrys
(2019) In Toxins 11(12).- Abstract
- The fresh-water cyanobacterium Microcystis is known to form blooms world-wide, and is often responsible for the production of microcystins found in lake water. Microcystins are non-ribosomal peptides with toxic effects, e.g. on vertebrates, but their function remains largely unresolved. Moreover, not all strains produce microcystins, and many different microcystin variants have been described. Here we explored the diversity of microcystin variants within Microcystis botrys, a common bloom-former in Sweden. We isolated a total of 130 strains through the duration of a bloom in eutrophic Lake Vomb, and analyzed their microcystin profiles with tandem mass spectrometry (LC-MS/MS). We found that microcystin producing (28.5%) and non-producing... (More)
- The fresh-water cyanobacterium Microcystis is known to form blooms world-wide, and is often responsible for the production of microcystins found in lake water. Microcystins are non-ribosomal peptides with toxic effects, e.g. on vertebrates, but their function remains largely unresolved. Moreover, not all strains produce microcystins, and many different microcystin variants have been described. Here we explored the diversity of microcystin variants within Microcystis botrys, a common bloom-former in Sweden. We isolated a total of 130 strains through the duration of a bloom in eutrophic Lake Vomb, and analyzed their microcystin profiles with tandem mass spectrometry (LC-MS/MS). We found that microcystin producing (28.5%) and non-producing (71.5%) M. botrys strains, co-existed throughout the bloom. However, microcystin producing strains were more prevalent towards the end of the sampling period. Overall, 26 unique M. botrys chemotypes were identified, and while some chemotypes re-occurred, others were found only once. The M. botrys chemotypes showed considerable variation both in terms of number of microcystin variants, as well as in what combinations the variants occurred. To our knowledge, this is the first report on microcystin chemotype variation and dynamics in M. botrys. In addition, our study verifies the co-existence of microcystin and non-microcystin producing strains, and we propose that environmental conditions may be implicated in determining their composition. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/2d3e0e1f-52c8-44d5-9633-da3c861a3814
- author
- Johansson, Emma LU ; Legrand, Catherine ; Björnerås, Caroline LU ; Godhe, Anna ; Mazur-Marzec, Hanna ; Säll, Torbjörn LU and Rengefors, Karin LU
- organization
- publishing date
- 2019-12-01
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Toxins
- volume
- 11
- issue
- 12
- article number
- 698
- pages
- 16 pages
- publisher
- MDPI AG
- external identifiers
-
- scopus:85076286751
- pmid:31805656
- ISSN
- 2072-6651
- DOI
- 10.3390/toxins11120698
- language
- English
- LU publication?
- yes
- id
- 2d3e0e1f-52c8-44d5-9633-da3c861a3814
- date added to LUP
- 2020-06-18 14:53:20
- date last changed
- 2024-05-15 13:57:52
@article{2d3e0e1f-52c8-44d5-9633-da3c861a3814, abstract = {{The fresh-water cyanobacterium Microcystis is known to form blooms world-wide, and is often responsible for the production of microcystins found in lake water. Microcystins are non-ribosomal peptides with toxic effects, e.g. on vertebrates, but their function remains largely unresolved. Moreover, not all strains produce microcystins, and many different microcystin variants have been described. Here we explored the diversity of microcystin variants within Microcystis botrys, a common bloom-former in Sweden. We isolated a total of 130 strains through the duration of a bloom in eutrophic Lake Vomb, and analyzed their microcystin profiles with tandem mass spectrometry (LC-MS/MS). We found that microcystin producing (28.5%) and non-producing (71.5%) M. botrys strains, co-existed throughout the bloom. However, microcystin producing strains were more prevalent towards the end of the sampling period. Overall, 26 unique M. botrys chemotypes were identified, and while some chemotypes re-occurred, others were found only once. The M. botrys chemotypes showed considerable variation both in terms of number of microcystin variants, as well as in what combinations the variants occurred. To our knowledge, this is the first report on microcystin chemotype variation and dynamics in M. botrys. In addition, our study verifies the co-existence of microcystin and non-microcystin producing strains, and we propose that environmental conditions may be implicated in determining their composition.}}, author = {{Johansson, Emma and Legrand, Catherine and Björnerås, Caroline and Godhe, Anna and Mazur-Marzec, Hanna and Säll, Torbjörn and Rengefors, Karin}}, issn = {{2072-6651}}, language = {{eng}}, month = {{12}}, number = {{12}}, publisher = {{MDPI AG}}, series = {{Toxins}}, title = {{High Diversity of Microcystin Chemotypes within a Summer Bloom of the Cyanobacterium Microcystis botrys}}, url = {{http://dx.doi.org/10.3390/toxins11120698}}, doi = {{10.3390/toxins11120698}}, volume = {{11}}, year = {{2019}}, }