Limited hydraulic recovery in seedlings of six tree species with contrasting leaf habits in subtropical China

Subtropical tree species may experience severe drought stress due to variable rainfall under future climates. However, the capacity to restore hydraulic function post-drought might differ among co-occurring species with contrasting leaf habits (e.g., evergreen and deciduous) and have implications fo...

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Detalles Bibliográficos
Autores: Duan, Honglang, Wang, Defub, Zhao, Nan, Huang, Guomin, Resco de Dios, Víctor, Tissue, David T.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2022
País:España
Institución:Universitat de Lleida (UdL)
Repositorio:Repositori Obert UdL
OAI Identifier:oai:repositori.udl.cat:10459.1/83961
Acceso en línea:https://doi.org/10.3389/fpls.2022.967187
http://hdl.handle.net/10459.1/83961
Access Level:acceso abierto
Palabra clave:Gas exchange
Hydraulic conductivity
NSC
Recovery
Water relations
Aigua--Anàlisi
Control hidràulic
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spelling Limited hydraulic recovery in seedlings of six tree species with contrasting leaf habits in subtropical ChinaDuan, HonglangWang, DefubZhao, NanHuang, GuominResco de Dios, VíctorTissue, David T.Gas exchangeHydraulic conductivityNSCRecoveryWater relationsAigua--AnàlisiControl hidràulicSubtropical tree species may experience severe drought stress due to variable rainfall under future climates. However, the capacity to restore hydraulic function post-drought might differ among co-occurring species with contrasting leaf habits (e.g., evergreen and deciduous) and have implications for future forest composition. Moreover, the links between hydraulic recovery and physiological and morphological traits related to water-carbon availability are still not well understood. Here, potted seedlings of six tree species (four evergreen and two deciduous) were grown outdoors under a rainout shelter. They grew under favorable water conditions until they were experimentally subjected to a soil water deficit leading to losses of ca. 50% of hydraulic conductivity, and then soils were re-watered to field capacity. Traits related to carbon and water relations were measured. There were differences in drought responses and recovery between species, but not as a function of evergreen or deciduous groups. Sapindus mukorossi exhibited the most rapid drought response, which was associated with a suite of physiological and morphological traits (larger plant size, the lowest hydraulic capacitance (Cbranch), higher minimum conductance (gmin) and lower HV (Huber value)). Upon re-watering, xylem water potential exhibited fast recovery in 1–3 days among species, while photosynthesis at saturating light (Asat) and stomatal conductance (gs) recovery lagged behind water potential recovery depending on species, with gs recovery being more delayed than Asat in most species. Furthermore, none of the six species exhibited significant hydraulic recovery during the 7 days re-watering period, indicating that xylem refilling was apparently limited; in addition, NSC availability had a minimal role in facilitating hydraulic recovery during this short-term period. Collectively, if water supply is limited by insignificant hydraulic recovery post-drought, the observed carbon assimilation recovery of seedlings may not be sustained over the longer term, potentially altering seedling regeneration and shifting forest species composition in subtropical China under climate change.This work was supported by grants from the National Natural Science Foundation of China (31600483 and 31760111) and the Natural Science Talent Funding of Guizhou University (202132).Frontiers Media S.A.2022info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttps://doi.org/10.3389/fpls.2022.967187http://hdl.handle.net/10459.1/83961reponame:Repositori Obert UdL instname:Universitat de Lleida (UdL)InglésReproducció del document publicat a https://doi.org/10.3389/fpls.2022.967187Frontiers in plant science, 2022, vol. 13, núm. 967187, p. 1-16cc-by (c) Duan et al., 2022info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by/4.0/oai:repositori.udl.cat:10459.1/839612026-06-24T12:42:17Z
dc.title.none.fl_str_mv Limited hydraulic recovery in seedlings of six tree species with contrasting leaf habits in subtropical China
title Limited hydraulic recovery in seedlings of six tree species with contrasting leaf habits in subtropical China
spellingShingle Limited hydraulic recovery in seedlings of six tree species with contrasting leaf habits in subtropical China
Duan, Honglang
Gas exchange
Hydraulic conductivity
NSC
Recovery
Water relations
Aigua--Anàlisi
Control hidràulic
title_short Limited hydraulic recovery in seedlings of six tree species with contrasting leaf habits in subtropical China
title_full Limited hydraulic recovery in seedlings of six tree species with contrasting leaf habits in subtropical China
title_fullStr Limited hydraulic recovery in seedlings of six tree species with contrasting leaf habits in subtropical China
title_full_unstemmed Limited hydraulic recovery in seedlings of six tree species with contrasting leaf habits in subtropical China
title_sort Limited hydraulic recovery in seedlings of six tree species with contrasting leaf habits in subtropical China
dc.creator.none.fl_str_mv Duan, Honglang
Wang, Defub
Zhao, Nan
Huang, Guomin
Resco de Dios, Víctor
Tissue, David T.
author Duan, Honglang
author_facet Duan, Honglang
Wang, Defub
Zhao, Nan
Huang, Guomin
Resco de Dios, Víctor
Tissue, David T.
author_role author
author2 Wang, Defub
Zhao, Nan
Huang, Guomin
Resco de Dios, Víctor
Tissue, David T.
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Gas exchange
Hydraulic conductivity
NSC
Recovery
Water relations
Aigua--Anàlisi
Control hidràulic
topic Gas exchange
Hydraulic conductivity
NSC
Recovery
Water relations
Aigua--Anàlisi
Control hidràulic
description Subtropical tree species may experience severe drought stress due to variable rainfall under future climates. However, the capacity to restore hydraulic function post-drought might differ among co-occurring species with contrasting leaf habits (e.g., evergreen and deciduous) and have implications for future forest composition. Moreover, the links between hydraulic recovery and physiological and morphological traits related to water-carbon availability are still not well understood. Here, potted seedlings of six tree species (four evergreen and two deciduous) were grown outdoors under a rainout shelter. They grew under favorable water conditions until they were experimentally subjected to a soil water deficit leading to losses of ca. 50% of hydraulic conductivity, and then soils were re-watered to field capacity. Traits related to carbon and water relations were measured. There were differences in drought responses and recovery between species, but not as a function of evergreen or deciduous groups. Sapindus mukorossi exhibited the most rapid drought response, which was associated with a suite of physiological and morphological traits (larger plant size, the lowest hydraulic capacitance (Cbranch), higher minimum conductance (gmin) and lower HV (Huber value)). Upon re-watering, xylem water potential exhibited fast recovery in 1–3 days among species, while photosynthesis at saturating light (Asat) and stomatal conductance (gs) recovery lagged behind water potential recovery depending on species, with gs recovery being more delayed than Asat in most species. Furthermore, none of the six species exhibited significant hydraulic recovery during the 7 days re-watering period, indicating that xylem refilling was apparently limited; in addition, NSC availability had a minimal role in facilitating hydraulic recovery during this short-term period. Collectively, if water supply is limited by insignificant hydraulic recovery post-drought, the observed carbon assimilation recovery of seedlings may not be sustained over the longer term, potentially altering seedling regeneration and shifting forest species composition in subtropical China under climate change.
publishDate 2022
dc.date.none.fl_str_mv 2022
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://doi.org/10.3389/fpls.2022.967187
http://hdl.handle.net/10459.1/83961
url https://doi.org/10.3389/fpls.2022.967187
http://hdl.handle.net/10459.1/83961
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció del document publicat a https://doi.org/10.3389/fpls.2022.967187
Frontiers in plant science, 2022, vol. 13, núm. 967187, p. 1-16
dc.rights.none.fl_str_mv cc-by (c) Duan et al., 2022
info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by/4.0/
rights_invalid_str_mv cc-by (c) Duan et al., 2022
http://creativecommons.org/licenses/by/4.0/
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Frontiers Media S.A.
publisher.none.fl_str_mv Frontiers Media S.A.
dc.source.none.fl_str_mv reponame:Repositori Obert UdL
instname:Universitat de Lleida (UdL)
instname_str Universitat de Lleida (UdL)
reponame_str Repositori Obert UdL
collection Repositori Obert UdL
repository.name.fl_str_mv
repository.mail.fl_str_mv
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