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The Response of Spore Germination of Sphagnum Mosses to Single and Combined Fire-Related Cues

Plants in flammable ecosystems have different response strategies to fire, such as increasing germination after exposure to smoke and break of dormancy through heat shock. Peatlands are ecosystems that are more likely to be disturbed by fire with increasing temperatures, but it is not clear how fire...

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Autores principales: Yusup, Shuayib, Sundberg, Sebastian, Fan, Beibei, Sulayman, Mamtimin, Bu, Zhao-Jun
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8875694/
https://www.ncbi.nlm.nih.gov/pubmed/35214817
http://dx.doi.org/10.3390/plants11040485
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author Yusup, Shuayib
Sundberg, Sebastian
Fan, Beibei
Sulayman, Mamtimin
Bu, Zhao-Jun
author_facet Yusup, Shuayib
Sundberg, Sebastian
Fan, Beibei
Sulayman, Mamtimin
Bu, Zhao-Jun
author_sort Yusup, Shuayib
collection PubMed
description Plants in flammable ecosystems have different response strategies to fire, such as increasing germination after exposure to smoke and break of dormancy through heat shock. Peatlands are ecosystems that are more likely to be disturbed by fire with increasing temperatures, but it is not clear how fire affects spore germination of Sphagnum, the dominant plants in peatlands. Here, we hypothesize that Sphagnum spores respond positively to single and combined treatments of moderate heat and smoke (by increased germinability), while spore germinability decreases in response to high temperature. We exposed the Sphagnum spores of four selected species (S. angustifolium, S. fuscum, S. magellanicum and S. squarrosum) collected from peatlands in the Changbai Mountains to heat (40, 60 and 100 °C), on its own and combined with smoke-water treatments. Our results showed that a heat of 100 °C inhibited the spore germination or even killed spores of all species, while spore germination of three (Sphagnum angustifolium, S. fuscum and S. squarrosum) of the four species was promoted by 40 and 60 °C heat compared to the control (20 °C). Hollow species (S. angustifolium and S. squarrosum) showed a stronger positive responsive to heat than hummock species (S. fuscum and S. magellanicum). Sphagnum fuscum spores responded positively to the combined heat and smoke treatment while the other species did not. For the first time, we demonstrate the positive effects of heat on its own and in combination with smoke on spore germination in wetland mosses, which may be important for the establishment and persistence of peatmoss populations after fire.
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spelling pubmed-88756942022-02-26 The Response of Spore Germination of Sphagnum Mosses to Single and Combined Fire-Related Cues Yusup, Shuayib Sundberg, Sebastian Fan, Beibei Sulayman, Mamtimin Bu, Zhao-Jun Plants (Basel) Article Plants in flammable ecosystems have different response strategies to fire, such as increasing germination after exposure to smoke and break of dormancy through heat shock. Peatlands are ecosystems that are more likely to be disturbed by fire with increasing temperatures, but it is not clear how fire affects spore germination of Sphagnum, the dominant plants in peatlands. Here, we hypothesize that Sphagnum spores respond positively to single and combined treatments of moderate heat and smoke (by increased germinability), while spore germinability decreases in response to high temperature. We exposed the Sphagnum spores of four selected species (S. angustifolium, S. fuscum, S. magellanicum and S. squarrosum) collected from peatlands in the Changbai Mountains to heat (40, 60 and 100 °C), on its own and combined with smoke-water treatments. Our results showed that a heat of 100 °C inhibited the spore germination or even killed spores of all species, while spore germination of three (Sphagnum angustifolium, S. fuscum and S. squarrosum) of the four species was promoted by 40 and 60 °C heat compared to the control (20 °C). Hollow species (S. angustifolium and S. squarrosum) showed a stronger positive responsive to heat than hummock species (S. fuscum and S. magellanicum). Sphagnum fuscum spores responded positively to the combined heat and smoke treatment while the other species did not. For the first time, we demonstrate the positive effects of heat on its own and in combination with smoke on spore germination in wetland mosses, which may be important for the establishment and persistence of peatmoss populations after fire. MDPI 2022-02-11 /pmc/articles/PMC8875694/ /pubmed/35214817 http://dx.doi.org/10.3390/plants11040485 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Yusup, Shuayib
Sundberg, Sebastian
Fan, Beibei
Sulayman, Mamtimin
Bu, Zhao-Jun
The Response of Spore Germination of Sphagnum Mosses to Single and Combined Fire-Related Cues
title The Response of Spore Germination of Sphagnum Mosses to Single and Combined Fire-Related Cues
title_full The Response of Spore Germination of Sphagnum Mosses to Single and Combined Fire-Related Cues
title_fullStr The Response of Spore Germination of Sphagnum Mosses to Single and Combined Fire-Related Cues
title_full_unstemmed The Response of Spore Germination of Sphagnum Mosses to Single and Combined Fire-Related Cues
title_short The Response of Spore Germination of Sphagnum Mosses to Single and Combined Fire-Related Cues
title_sort response of spore germination of sphagnum mosses to single and combined fire-related cues
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8875694/
https://www.ncbi.nlm.nih.gov/pubmed/35214817
http://dx.doi.org/10.3390/plants11040485
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