학술논문
Molecular and physiological responses to desiccation indicate the abscisic acid pathway is conserved in the peat moss, Sphagnum.
Document Type
Academic Journal
Author
Nibau C; National Plant Phenomics Centre, Institute of Biological, Environmental and Rural Sciences, Aberystwyth University, Aberystwyth, UK.; van de Koot W; National Plant Phenomics Centre, Institute of Biological, Environmental and Rural Sciences, Aberystwyth University, Aberystwyth, UK.; Spiliotis D; National Plant Phenomics Centre, Institute of Biological, Environmental and Rural Sciences, Aberystwyth University, Aberystwyth, UK.; Williams K; National Plant Phenomics Centre, Institute of Biological, Environmental and Rural Sciences, Aberystwyth University, Aberystwyth, UK.; Kramaric T; Institute of Biological, Environmental and Rural Sciences, Aberystwyth University, Aberystwyth, UK.; Beckmann M; Institute of Biological, Environmental and Rural Sciences, Aberystwyth University, Aberystwyth, UK.; Mur L; Institute of Biological, Environmental and Rural Sciences, Aberystwyth University, Aberystwyth, UK.; Hiwatashi Y; School of Food Industrial Sciences, Miyagi University, Sendai, Japan.; Doonan JH; National Plant Phenomics Centre, Institute of Biological, Environmental and Rural Sciences, Aberystwyth University, Aberystwyth, UK.
Source
Publisher: Oxford University Press Country of Publication: England NLM ID: 9882906 Publication Model: Print Cited Medium: Internet ISSN: 1460-2431 (Electronic) Linking ISSN: 00220957 NLM ISO Abbreviation: J Exp Bot Subsets: MEDLINE
Subject
Language
English
Abstract
Mosses of the genus Sphagnum are the main components of peatlands, a major carbon-storing ecosystem. Changes in precipitation patterns are predicted to affect water relations in this ecosystem, but the effect of desiccation on the physiological and molecular processes in Sphagnum is still largely unexplored. Here we show that different Sphagnum species have differential physiological and molecular responses to desiccation but, surprisingly, this is not directly correlated with their position in relation to the water table. In addition, the expression of drought responsive genes is increased upon water withdrawal in all species. This increase in gene expression is accompanied by an increase in abscisic acid (ABA), supporting a role for ABA during desiccation responses in Sphagnum. Not only do ABA levels increase upon desiccation, but Sphagnum plants pre-treated with ABA display increased tolerance to desiccation, suggesting that ABA levels play a functional role in the response. In addition, many of the ABA signalling components are present in Sphagnum and we demonstrate, by complementation in Physcomitrium patens, that Sphagnum ABI3 is functionally conserved. The data presented here, therefore, support a conserved role for ABA in desiccation responses in Sphagnum.
(© The Author(s) 2022. Published by Oxford University Press on behalf of the Society for Experimental Biology.)
(© The Author(s) 2022. Published by Oxford University Press on behalf of the Society for Experimental Biology.)