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Stress Memory of Recurrent Environmental Challenges in Marine Invasive Species: Ciona robusta as a Case Study

Fluctuating environmental changes impose tremendous stresses on sessile organisms in marine ecosystems, in turn, organisms develop complex response mechanisms to keep adaptive homeostasis for survival. Physiological plasticity is one of the primary lines of defense against environmental challenges,...

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Autores principales: Li, Hanxi, Huang, Xuena, Zhan, Aibin
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7031352/
https://www.ncbi.nlm.nih.gov/pubmed/32116797
http://dx.doi.org/10.3389/fphys.2020.00094
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author Li, Hanxi
Huang, Xuena
Zhan, Aibin
author_facet Li, Hanxi
Huang, Xuena
Zhan, Aibin
author_sort Li, Hanxi
collection PubMed
description Fluctuating environmental changes impose tremendous stresses on sessile organisms in marine ecosystems, in turn, organisms develop complex response mechanisms to keep adaptive homeostasis for survival. Physiological plasticity is one of the primary lines of defense against environmental challenges, and such defense often relies on the antioxidant defense system (ADS). Hence, it is imperative to understand response mechanisms of ADS to fluctuating environments. Invasive species provide excellent models to study how species cope with environmental stresses, as invasive species encounter sudden, and often recurrent, extensive environmental challenges during the whole invasion process. Here, we studied the roles of ADS on rapid response to recurrent cold challenges in a highly invasive tunicate (Ciona robusta) by simulating cold stresses during its invasion process. We assessed antioxidative indicators, including malondialdehyde (MDA), total antioxidant capacity (T-AOC), superoxide dismutase (SOD), catalase (CAT), and glutathione (GSH), as well as transcriptional changes of ADS-related genes to reveal the physiological plasticity under recurring cold stresses. Our results demonstrated that physiological homeostasis relied on the resilience of ADS, which further accordingly tuned antioxidant activity and gene expression to changing environments. The initial cold stress remodeled baselines of ADS to promote the development of stress memory, and subsequent stress memory largely decreased the physiological response to recurrent environmental challenges. All results here suggest that C. robusta could develop stress memory to maintain physiological homeostasis in changing or harsh environments. The results obtained in this study provide new insights into the mechanism of rapid physiological adaption during biological invasions.
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spelling pubmed-70313522020-02-28 Stress Memory of Recurrent Environmental Challenges in Marine Invasive Species: Ciona robusta as a Case Study Li, Hanxi Huang, Xuena Zhan, Aibin Front Physiol Physiology Fluctuating environmental changes impose tremendous stresses on sessile organisms in marine ecosystems, in turn, organisms develop complex response mechanisms to keep adaptive homeostasis for survival. Physiological plasticity is one of the primary lines of defense against environmental challenges, and such defense often relies on the antioxidant defense system (ADS). Hence, it is imperative to understand response mechanisms of ADS to fluctuating environments. Invasive species provide excellent models to study how species cope with environmental stresses, as invasive species encounter sudden, and often recurrent, extensive environmental challenges during the whole invasion process. Here, we studied the roles of ADS on rapid response to recurrent cold challenges in a highly invasive tunicate (Ciona robusta) by simulating cold stresses during its invasion process. We assessed antioxidative indicators, including malondialdehyde (MDA), total antioxidant capacity (T-AOC), superoxide dismutase (SOD), catalase (CAT), and glutathione (GSH), as well as transcriptional changes of ADS-related genes to reveal the physiological plasticity under recurring cold stresses. Our results demonstrated that physiological homeostasis relied on the resilience of ADS, which further accordingly tuned antioxidant activity and gene expression to changing environments. The initial cold stress remodeled baselines of ADS to promote the development of stress memory, and subsequent stress memory largely decreased the physiological response to recurrent environmental challenges. All results here suggest that C. robusta could develop stress memory to maintain physiological homeostasis in changing or harsh environments. The results obtained in this study provide new insights into the mechanism of rapid physiological adaption during biological invasions. Frontiers Media S.A. 2020-02-13 /pmc/articles/PMC7031352/ /pubmed/32116797 http://dx.doi.org/10.3389/fphys.2020.00094 Text en Copyright © 2020 Li, Huang and Zhan. http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
spellingShingle Physiology
Li, Hanxi
Huang, Xuena
Zhan, Aibin
Stress Memory of Recurrent Environmental Challenges in Marine Invasive Species: Ciona robusta as a Case Study
title Stress Memory of Recurrent Environmental Challenges in Marine Invasive Species: Ciona robusta as a Case Study
title_full Stress Memory of Recurrent Environmental Challenges in Marine Invasive Species: Ciona robusta as a Case Study
title_fullStr Stress Memory of Recurrent Environmental Challenges in Marine Invasive Species: Ciona robusta as a Case Study
title_full_unstemmed Stress Memory of Recurrent Environmental Challenges in Marine Invasive Species: Ciona robusta as a Case Study
title_short Stress Memory of Recurrent Environmental Challenges in Marine Invasive Species: Ciona robusta as a Case Study
title_sort stress memory of recurrent environmental challenges in marine invasive species: ciona robusta as a case study
topic Physiology
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7031352/
https://www.ncbi.nlm.nih.gov/pubmed/32116797
http://dx.doi.org/10.3389/fphys.2020.00094
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