Increased heat resilience of intraspecific hybrids compared to inbred lineages of the kelp Laminaria digitata: physiology and transcriptomics
Kelps, the marine forest foundation species, are threatened by ocean warming at their warm distributional edges. To mechanistically investigate inheritance of thermal traits, we assessed thermal tolerance of inbred (selfings) and outbred (crosses) sporophytes of the N-Atlantic kelp Laminaria digitat...
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Online Access: | https://epic.awi.de/id/eprint/53896/ https://epic.awi.de/id/eprint/53896/1/20210210_Liesner_IPC.pdf https://hdl.handle.net/10013/epic.4e2428b5-d568-4ee7-b377-ce3c6b13feff |
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ftawi:oai:epic.awi.de:53896 2023-05-15T15:11:11+02:00 Increased heat resilience of intraspecific hybrids compared to inbred lineages of the kelp Laminaria digitata: physiology and transcriptomics Liesner, Daniel Rana, Shivani Harms, Lars Pearson, Gareth A. Heinrich, Sandra Bischof, Kai Bartsch, Inka Glöckner, Gernot Valentin, Klaus-Ulrich 2021-03 application/pdf https://epic.awi.de/id/eprint/53896/ https://epic.awi.de/id/eprint/53896/1/20210210_Liesner_IPC.pdf https://hdl.handle.net/10013/epic.4e2428b5-d568-4ee7-b377-ce3c6b13feff unknown https://epic.awi.de/id/eprint/53896/1/20210210_Liesner_IPC.pdf Liesner, D. orcid:0000-0002-2125-9498 , Rana, S. , Harms, L. orcid:0000-0001-7620-0613 , Pearson, G. A. orcid:0000-0002-0768-464X , Heinrich, S. , Bischof, K. , Bartsch, I. orcid:0000-0001-7609-2149 , Glöckner, G. orcid:0000-0002-9061-1061 and Valentin, K. U. (2021) Increased heat resilience of intraspecific hybrids compared to inbred lineages of the kelp Laminaria digitata: physiology and transcriptomics , 12th International Phycological Congress, Chile, 22 March 2021 - 26 March 2021 . hdl:10013/epic.4e2428b5-d568-4ee7-b377-ce3c6b13feff info:eu-repo/semantics/embargoedAccess EPIC312th International Phycological Congress, Chile, 2021-03-22-2021-03-26 Conference notRev info:eu-repo/semantics/conferenceObject 2021 ftawi 2023-03-20T00:15:51Z Kelps, the marine forest foundation species, are threatened by ocean warming at their warm distributional edges. To mechanistically investigate inheritance of thermal traits, we assessed thermal tolerance of inbred (selfings) and outbred (crosses) sporophytes of the N-Atlantic kelp Laminaria digitata among isolates from the genetically distinct populations of Helgoland (North Sea) and Spitsbergen (Arctic). First, we investigated the upper thermal tolerance of microscopic sporophytes in a 14-day experiment applying 20–23°C. The upper survival temperature was lower for the Spitsbergen selfing (21°C) than for the Helgoland selfing and the reciprocal crosses (22°C). We then subjected 4–7 cm long sporophytes to a control temperature (10°C), moderate (19°C) and sub-lethal heat stress (20.5°C) to assess metabolic regulation via whole-transcriptome analysis in addition to physiological parameters. Growth and optimum quantum yield decreased similarly in both crosses and the Helgoland selfing at 19 and 20.5°C, while inbred Spitsbergen sporophytes died within seven days at both 19 and 20.5°C. At 10°C, the Spitsbergen selfing showed the highest differential gene expression. Considering only the three surviving lineages at 20.5°C, differential gene expression was 61–78% lower in the crosses compared to the Helgoland selfing, including reduced expression of transcripts related to cellular stress responses. This implies that both intraspecific crosses maintained a growth response similar to the Helgoland selfing with reduced metabolic regulation during sublethal heat stress, indicating subtle heterosis (hybrid vigour) as a beneficial effect of outbreeding. Results are discussed in the frame of mariculture and marine forest restoration. Conference Object Arctic Spitsbergen Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Arctic Helgoland |
institution |
Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
Kelps, the marine forest foundation species, are threatened by ocean warming at their warm distributional edges. To mechanistically investigate inheritance of thermal traits, we assessed thermal tolerance of inbred (selfings) and outbred (crosses) sporophytes of the N-Atlantic kelp Laminaria digitata among isolates from the genetically distinct populations of Helgoland (North Sea) and Spitsbergen (Arctic). First, we investigated the upper thermal tolerance of microscopic sporophytes in a 14-day experiment applying 20–23°C. The upper survival temperature was lower for the Spitsbergen selfing (21°C) than for the Helgoland selfing and the reciprocal crosses (22°C). We then subjected 4–7 cm long sporophytes to a control temperature (10°C), moderate (19°C) and sub-lethal heat stress (20.5°C) to assess metabolic regulation via whole-transcriptome analysis in addition to physiological parameters. Growth and optimum quantum yield decreased similarly in both crosses and the Helgoland selfing at 19 and 20.5°C, while inbred Spitsbergen sporophytes died within seven days at both 19 and 20.5°C. At 10°C, the Spitsbergen selfing showed the highest differential gene expression. Considering only the three surviving lineages at 20.5°C, differential gene expression was 61–78% lower in the crosses compared to the Helgoland selfing, including reduced expression of transcripts related to cellular stress responses. This implies that both intraspecific crosses maintained a growth response similar to the Helgoland selfing with reduced metabolic regulation during sublethal heat stress, indicating subtle heterosis (hybrid vigour) as a beneficial effect of outbreeding. Results are discussed in the frame of mariculture and marine forest restoration. |
format |
Conference Object |
author |
Liesner, Daniel Rana, Shivani Harms, Lars Pearson, Gareth A. Heinrich, Sandra Bischof, Kai Bartsch, Inka Glöckner, Gernot Valentin, Klaus-Ulrich |
spellingShingle |
Liesner, Daniel Rana, Shivani Harms, Lars Pearson, Gareth A. Heinrich, Sandra Bischof, Kai Bartsch, Inka Glöckner, Gernot Valentin, Klaus-Ulrich Increased heat resilience of intraspecific hybrids compared to inbred lineages of the kelp Laminaria digitata: physiology and transcriptomics |
author_facet |
Liesner, Daniel Rana, Shivani Harms, Lars Pearson, Gareth A. Heinrich, Sandra Bischof, Kai Bartsch, Inka Glöckner, Gernot Valentin, Klaus-Ulrich |
author_sort |
Liesner, Daniel |
title |
Increased heat resilience of intraspecific hybrids compared to inbred lineages of the kelp Laminaria digitata: physiology and transcriptomics |
title_short |
Increased heat resilience of intraspecific hybrids compared to inbred lineages of the kelp Laminaria digitata: physiology and transcriptomics |
title_full |
Increased heat resilience of intraspecific hybrids compared to inbred lineages of the kelp Laminaria digitata: physiology and transcriptomics |
title_fullStr |
Increased heat resilience of intraspecific hybrids compared to inbred lineages of the kelp Laminaria digitata: physiology and transcriptomics |
title_full_unstemmed |
Increased heat resilience of intraspecific hybrids compared to inbred lineages of the kelp Laminaria digitata: physiology and transcriptomics |
title_sort |
increased heat resilience of intraspecific hybrids compared to inbred lineages of the kelp laminaria digitata: physiology and transcriptomics |
publishDate |
2021 |
url |
https://epic.awi.de/id/eprint/53896/ https://epic.awi.de/id/eprint/53896/1/20210210_Liesner_IPC.pdf https://hdl.handle.net/10013/epic.4e2428b5-d568-4ee7-b377-ce3c6b13feff |
geographic |
Arctic Helgoland |
geographic_facet |
Arctic Helgoland |
genre |
Arctic Spitsbergen |
genre_facet |
Arctic Spitsbergen |
op_source |
EPIC312th International Phycological Congress, Chile, 2021-03-22-2021-03-26 |
op_relation |
https://epic.awi.de/id/eprint/53896/1/20210210_Liesner_IPC.pdf Liesner, D. orcid:0000-0002-2125-9498 , Rana, S. , Harms, L. orcid:0000-0001-7620-0613 , Pearson, G. A. orcid:0000-0002-0768-464X , Heinrich, S. , Bischof, K. , Bartsch, I. orcid:0000-0001-7609-2149 , Glöckner, G. orcid:0000-0002-9061-1061 and Valentin, K. U. (2021) Increased heat resilience of intraspecific hybrids compared to inbred lineages of the kelp Laminaria digitata: physiology and transcriptomics , 12th International Phycological Congress, Chile, 22 March 2021 - 26 March 2021 . hdl:10013/epic.4e2428b5-d568-4ee7-b377-ce3c6b13feff |
op_rights |
info:eu-repo/semantics/embargoedAccess |
_version_ |
1766342086249938944 |