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Research article - Peer-reviewed, 2022

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

Abstract

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 degrees C), on its own and combined with smoke-water treatments. Our results showed that a heat of 100 degrees 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 degrees C heat compared to the control (20 degrees 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.

Keywords

spore germinability; fire disturbance; persistence; germination cue

Published in

Plants
2022, volume: 11, number: 4, article number: 485
Publisher: MDPI

Authors' information

Yusup, Shuayib
Xinjiang University
Yusup, Shuayib
Northeast Normal University - China
Uppsala University
Northeast Normal University
Swedish University of Agricultural Sciences, Swedish Species Information Centre
Fan, Beibei
Northeast Normal University - China
Sulayman, Mamtimin
Xinjiang University
Bu, Zhao-Jun
Northeast Normal University - China

UKÄ Subject classification

Ecology

Publication Identifiers

DOI: https://doi.org/10.3390/plants11040485

URI (permanent link to this page)

https://res.slu.se/id/publ/116458