Leaf orientation as part of the leaf developmental program in the semi-deciduous shrub, Cistus albidus l.: Diurnal, positional, and photoprotective effects during winter

Mediterranean ecosystems harbor a very important part of Earth's biodiversity, and they are a conservation priority due to the effects of global change. Here, we examined the performance of the semi-deciduous shrub Cistus albidus under Mediterranean conditions during winter, including changes i...

Descripción completa

Detalles Bibliográficos
Autores: Pérez-Llorca, Marina, Casadesús, Andrea, Müller, Maren, Munné Bosch, Sergi
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2019
País:España
Institución:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
Repositorio:Recercat. Dipósit de la Recerca de Catalunya
OAI Identifier:oai:recercat.cat:2445/165169
Acceso en línea:https://hdl.handle.net/2445/165169
Access Level:acceso abierto
Palabra clave:Biodiversitat
Fulles
Melatonina
Hivernació
Biodiversity
Leaves
Melatonin
Hibernation
id ES_47268bd2f9bfd404dceae34146ebb3c8
oai_identifier_str oai:recercat.cat:2445/165169
network_acronym_str ES
network_name_str España
repository_id_str
spelling Leaf orientation as part of the leaf developmental program in the semi-deciduous shrub, Cistus albidus l.: Diurnal, positional, and photoprotective effects during winterPérez-Llorca, MarinaCasadesús, AndreaMüller, MarenMunné Bosch, SergiBiodiversitatFullesMelatoninaHivernacióBiodiversityLeavesMelatoninHibernationMediterranean ecosystems harbor a very important part of Earth's biodiversity, and they are a conservation priority due to the effects of global change. Here, we examined the performance of the semi-deciduous shrub Cistus albidus under Mediterranean conditions during winter, including changes in leaf angle governed by diurnal, seasonal, and positional effects and their relationship with winter photoinhibition and photoprotection. We found marked diurnal variations in leaf angle during the day in autumn, which disappeared as the photoperiod shortened during winter due to a progressive decrease in the predawn leaf angle from November to January. During this period, auxin contents decreased, while those of melatonin increased, and the Fv/Fm ratio, chlorophyll, and tocopherol contents kept unaltered, thus indicating the absence of photoinhibitory damage. A marked decrease in the leaf angle toward the shoot apex occurred during winter, which was associated with slightly higher Fv/Fm ratios. An analysis of the inter-individual variability and sun orientation effects on leaf movements in a population growing in the Montserrat mountains revealed a very marked variability of 46.8% in the leaf angle, while Fv/Fm ratio showed a variation of 7.5% only. West orientation, which was associated with reduced leaf temperatures, but with no differences in the photosynthetic photon flux density, led to enhanced tocopherol contents, while leaf angle, Fv/Fm ratio, chlorophyll, auxin, and melatonin contents kept unaltered. It is concluded that (1) C. albidus has very effective and fine-regulated photoprotection mechanisms, including an adequate orientation of decussate leaves as part of the developmental program, (2) leaf angle is modulated on a diurnal and seasonal basis, thus contributing to prevent photoinhibition as a first line of defense, and (3) enhanced tocopherol contents help withstand combined high light with low temperature stress in C. albidus growing at high elevation.Frontiers Media2020202020192020info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersion11 p.application/pdfhttps://hdl.handle.net/2445/165169Articles publicats en revistes (Biologia Evolutiva, Ecologia i Ciències Ambientals)reponame:Recercat. Dipósit de la Recerca de Catalunyainstname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)InglésReproducció del document publicat a: https://doi.org/10.3389/fpls.2019.00767Frontiers in Plant Science, 2019, vol. 10, p. 767https://doi.org/10.3389/fpls.2019.00767cc-by (c) Pérez-Llorca, Marina et al., 2019http://creativecommons.org/licenses/by/3.0/esinfo:eu-repo/semantics/openAccessoai:recercat.cat:2445/1651692026-05-29T05:05:01Z
dc.title.none.fl_str_mv Leaf orientation as part of the leaf developmental program in the semi-deciduous shrub, Cistus albidus l.: Diurnal, positional, and photoprotective effects during winter
title Leaf orientation as part of the leaf developmental program in the semi-deciduous shrub, Cistus albidus l.: Diurnal, positional, and photoprotective effects during winter
spellingShingle Leaf orientation as part of the leaf developmental program in the semi-deciduous shrub, Cistus albidus l.: Diurnal, positional, and photoprotective effects during winter
Pérez-Llorca, Marina
Biodiversitat
Fulles
Melatonina
Hivernació
Biodiversity
Leaves
Melatonin
Hibernation
title_short Leaf orientation as part of the leaf developmental program in the semi-deciduous shrub, Cistus albidus l.: Diurnal, positional, and photoprotective effects during winter
title_full Leaf orientation as part of the leaf developmental program in the semi-deciduous shrub, Cistus albidus l.: Diurnal, positional, and photoprotective effects during winter
title_fullStr Leaf orientation as part of the leaf developmental program in the semi-deciduous shrub, Cistus albidus l.: Diurnal, positional, and photoprotective effects during winter
title_full_unstemmed Leaf orientation as part of the leaf developmental program in the semi-deciduous shrub, Cistus albidus l.: Diurnal, positional, and photoprotective effects during winter
title_sort Leaf orientation as part of the leaf developmental program in the semi-deciduous shrub, Cistus albidus l.: Diurnal, positional, and photoprotective effects during winter
dc.creator.none.fl_str_mv Pérez-Llorca, Marina
Casadesús, Andrea
Müller, Maren
Munné Bosch, Sergi
author Pérez-Llorca, Marina
author_facet Pérez-Llorca, Marina
Casadesús, Andrea
Müller, Maren
Munné Bosch, Sergi
author_role author
author2 Casadesús, Andrea
Müller, Maren
Munné Bosch, Sergi
author2_role author
author
author
dc.subject.none.fl_str_mv Biodiversitat
Fulles
Melatonina
Hivernació
Biodiversity
Leaves
Melatonin
Hibernation
topic Biodiversitat
Fulles
Melatonina
Hivernació
Biodiversity
Leaves
Melatonin
Hibernation
description Mediterranean ecosystems harbor a very important part of Earth's biodiversity, and they are a conservation priority due to the effects of global change. Here, we examined the performance of the semi-deciduous shrub Cistus albidus under Mediterranean conditions during winter, including changes in leaf angle governed by diurnal, seasonal, and positional effects and their relationship with winter photoinhibition and photoprotection. We found marked diurnal variations in leaf angle during the day in autumn, which disappeared as the photoperiod shortened during winter due to a progressive decrease in the predawn leaf angle from November to January. During this period, auxin contents decreased, while those of melatonin increased, and the Fv/Fm ratio, chlorophyll, and tocopherol contents kept unaltered, thus indicating the absence of photoinhibitory damage. A marked decrease in the leaf angle toward the shoot apex occurred during winter, which was associated with slightly higher Fv/Fm ratios. An analysis of the inter-individual variability and sun orientation effects on leaf movements in a population growing in the Montserrat mountains revealed a very marked variability of 46.8% in the leaf angle, while Fv/Fm ratio showed a variation of 7.5% only. West orientation, which was associated with reduced leaf temperatures, but with no differences in the photosynthetic photon flux density, led to enhanced tocopherol contents, while leaf angle, Fv/Fm ratio, chlorophyll, auxin, and melatonin contents kept unaltered. It is concluded that (1) C. albidus has very effective and fine-regulated photoprotection mechanisms, including an adequate orientation of decussate leaves as part of the developmental program, (2) leaf angle is modulated on a diurnal and seasonal basis, thus contributing to prevent photoinhibition as a first line of defense, and (3) enhanced tocopherol contents help withstand combined high light with low temperature stress in C. albidus growing at high elevation.
publishDate 2019
dc.date.none.fl_str_mv 2019
2020
2020
2020
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://hdl.handle.net/2445/165169
url https://hdl.handle.net/2445/165169
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.2019.00767
Frontiers in Plant Science, 2019, vol. 10, p. 767
https://doi.org/10.3389/fpls.2019.00767
dc.rights.none.fl_str_mv cc-by (c) Pérez-Llorca, Marina et al., 2019
http://creativecommons.org/licenses/by/3.0/es
info:eu-repo/semantics/openAccess
rights_invalid_str_mv cc-by (c) Pérez-Llorca, Marina et al., 2019
http://creativecommons.org/licenses/by/3.0/es
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 11 p.
application/pdf
dc.publisher.none.fl_str_mv Frontiers Media
publisher.none.fl_str_mv Frontiers Media
dc.source.none.fl_str_mv Articles publicats en revistes (Biologia Evolutiva, Ecologia i Ciències Ambientals)
reponame:Recercat. Dipósit de la Recerca de Catalunya
instname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
instname_str Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
reponame_str Recercat. Dipósit de la Recerca de Catalunya
collection Recercat. Dipósit de la Recerca de Catalunya
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869407275748163584
score 15,81155

Similares en LA Referencia