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Chrismas, N, Tindall-Jones, B, Jenkins, HL, Harley, J, Bird, KE and Cunliffe, M 2023 Metatranscriptomics reveals diversity of symbiotic interaction and mechanisms of carbon exchange in the marine cyanolichen Lichina pygmaea. New Phytologist. doi.org/10.1111/nph.19320
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New Phytologist - 2023 - Chrismas - Metatranscriptomics reveals diversity of symbiotic interaction and mechanisms of carbon.pdf Available under License Creative Commons Attribution. Download (3MB) | Preview |
Abstract/Summary
Lichens are exemplar symbioses based upon carbon exchange between photobionts and their mycobiont hosts. Historically considered a two-way relationship, some lichen symbioses have been shown to contain multiple photobiont partners; however, the way in which these photobiont communities react to environmental change is poorly understood. Lichina pygmaea is a marine cyanolichen that inhabits rocky seashores where it is submerged in seawater during every tidal cycle. Recent work has indicated that L. pygmaea has a complex photobiont community including the cyanobionts Rivularia and Pleurocapsa. We performed rRNA-based metabarcoding and mRNA metatranscriptomics of the L. pygmaea holobiont at high and low tide to investigate community response to immersion in seawater. Carbon exchange in L. pygmaea is a dynamic process, influenced by both tidal cycle and the biology of the individual symbiotic components. The mycobiont and two cyanobiont partners exhibit distinct transcriptional responses to seawater hydration. Sugar-based compatible solutes produced by Rivularia and Pleurocapsa in response to seawater are a potential source of carbon to the mycobiont. We propose that extracellular processing of photobiont-derived polysaccharides is a fundamental step in carbon acquisition by L. pygmaea and is analogous to uptake of plant-derived carbon in ectomycorrhizal symbioses.
| Item Type: | Publication - Article |
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| Additional Keywords: | carbon, cyanobacteria, lichens, Lichina pygmaea, marine symbiosis |
| Subjects: | Marine Sciences |
| Divisions: | Marine Biological Association of the UK > Other (MBA) |
| Depositing User: | Ms Kristina Hixon |
| Date made live: | 27 Oct 2023 10:09 |
| Last Modified: | 09 Feb 2024 16:56 |
| URI: | https://plymsea.ac.uk/id/eprint/10045 |
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