Fisiologia e metabolismo foliar em duas variedades de videira sujeitas a um ciclo de défice hídrico e reidratação
Autor(a) principal: | |
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Data de Publicação: | 2015 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.5039/agraria.v10i2a5045 http://hdl.handle.net/11449/228048 |
Resumo: | This work aimed to compare two grapevine varieties grown in Portugal, Syrah and Touriga Nacional, in terms of their physiological and biochemical behavior in response to a cycle of severe water stress followed by rehydration. Vines were subjected to either continuous watering (FI) or not watered for 21 days and rehydrated after leaf water potential at predawn reach-1.1 MPa (NI). Observations took place at four stages: i) immediately before water withdrawal (day 0), ii) Maximum stress (day 21), iii) two days after rehydration (day 23) and iv) six days after rehydration (day 27). We measured leaf water potential at pre-dawn (Ψ<inf>pd</inf>) and at midday (Ψ<inf>md</inf>), stomatal conductance to water vapor (gs), net photosynthesis (An), transpiration (E), the sub-stomatal CO<inf>2</inf> concentration (ci) and chlorophyll a fluorescence. The contents of total chlorophyll content and hydrogen peroxide (H<inf>2</inf>O<inf>2</inf>) in leaves were determined as well. All parameters were negatively affected by water stress, except basal fluorescence (Fo). The recovery capacity in terms of water potential and leaf gas exchange was similar in both varieties but it proved incomplete, in particular for net photosynthesis. The variety 'Touriga Nacional' showed higher degradation of chlorophyll and higher levels of H<inf>2</inf>O<inf>2</inf> in leaves than the 'Syrah' variety, which may explain the high susceptibility of Touriga to leaf senescence and leaf drop under water stress conditions in the field. |
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Fisiologia e metabolismo foliar em duas variedades de videira sujeitas a um ciclo de défice hídrico e reidrataçãoLeaf physiology and metabolism in two grapevine varieties subjected to a drying and wetting cycleChlorophyll a fluorescenceGas exchangeReactive oxigen speciesVitis viniferaWater potentialThis work aimed to compare two grapevine varieties grown in Portugal, Syrah and Touriga Nacional, in terms of their physiological and biochemical behavior in response to a cycle of severe water stress followed by rehydration. Vines were subjected to either continuous watering (FI) or not watered for 21 days and rehydrated after leaf water potential at predawn reach-1.1 MPa (NI). Observations took place at four stages: i) immediately before water withdrawal (day 0), ii) Maximum stress (day 21), iii) two days after rehydration (day 23) and iv) six days after rehydration (day 27). We measured leaf water potential at pre-dawn (Ψ<inf>pd</inf>) and at midday (Ψ<inf>md</inf>), stomatal conductance to water vapor (gs), net photosynthesis (An), transpiration (E), the sub-stomatal CO<inf>2</inf> concentration (ci) and chlorophyll a fluorescence. The contents of total chlorophyll content and hydrogen peroxide (H<inf>2</inf>O<inf>2</inf>) in leaves were determined as well. All parameters were negatively affected by water stress, except basal fluorescence (Fo). The recovery capacity in terms of water potential and leaf gas exchange was similar in both varieties but it proved incomplete, in particular for net photosynthesis. The variety 'Touriga Nacional' showed higher degradation of chlorophyll and higher levels of H<inf>2</inf>O<inf>2</inf> in leaves than the 'Syrah' variety, which may explain the high susceptibility of Touriga to leaf senescence and leaf drop under water stress conditions in the field.Universidade do Estado da Bahia, Departamento de Ciências Humanas, Campus IX. Loteamento Flamengo, s/n, BR 242Instituto Superior de Agronomia - LEAF, Tapada da AjudaUniversidade Nova de Lisboa, Instituto de Tecnologia Química e Biológica, LEM, Avenida da Republica, Estacao Agronomica NacionalUniversidade Estadual Paulista Júlio de Mesquita Filho, Instituto de Biociências, Campus Botucatu, Departamento de Botânica, AC Rubião Junior, Rua Plinio Silva, s/n, Jardim Santo Inacio (Rubiao Junior)Universidade Estadual Paulista Júlio de Mesquita Filho, Instituto de Biociências, Campus Botucatu, Departamento de Botânica, AC Rubião Junior, Rua Plinio Silva, s/n, Jardim Santo Inacio (Rubiao Junior)Universidade do Estado da Bahia, Departamento de Ciências HumanasInstituto Superior de Agronomia - LEAF, Tapada da AjudaUniversidade Nova de Lisboa, Instituto de Tecnologia Química e Biológica, LEMUniversidade Estadual Paulista (UNESP)Cerqueira, Reginaldo ConceiçãoCosta, Joaquim MiguelChaves, Maria ManuelaRodrigues, João Domingos [UNESP]2022-04-29T07:26:28Z2022-04-29T07:26:28Z2015-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article211-217http://dx.doi.org/10.5039/agraria.v10i2a5045Revista Brasileirade Ciencias Agrarias, v. 10, n. 2, p. 211-217, 2015.1981-09971981-1160http://hdl.handle.net/11449/22804810.5039/agraria.v10i2a50452-s2.0-84943252109Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPporRevista Brasileirade Ciencias Agrariasinfo:eu-repo/semantics/openAccess2022-04-29T07:26:28Zoai:repositorio.unesp.br:11449/228048Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T15:25:25.710508Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Fisiologia e metabolismo foliar em duas variedades de videira sujeitas a um ciclo de défice hídrico e reidratação Leaf physiology and metabolism in two grapevine varieties subjected to a drying and wetting cycle |
title |
Fisiologia e metabolismo foliar em duas variedades de videira sujeitas a um ciclo de défice hídrico e reidratação |
spellingShingle |
Fisiologia e metabolismo foliar em duas variedades de videira sujeitas a um ciclo de défice hídrico e reidratação Cerqueira, Reginaldo Conceição Chlorophyll a fluorescence Gas exchange Reactive oxigen species Vitis vinifera Water potential |
title_short |
Fisiologia e metabolismo foliar em duas variedades de videira sujeitas a um ciclo de défice hídrico e reidratação |
title_full |
Fisiologia e metabolismo foliar em duas variedades de videira sujeitas a um ciclo de défice hídrico e reidratação |
title_fullStr |
Fisiologia e metabolismo foliar em duas variedades de videira sujeitas a um ciclo de défice hídrico e reidratação |
title_full_unstemmed |
Fisiologia e metabolismo foliar em duas variedades de videira sujeitas a um ciclo de défice hídrico e reidratação |
title_sort |
Fisiologia e metabolismo foliar em duas variedades de videira sujeitas a um ciclo de défice hídrico e reidratação |
author |
Cerqueira, Reginaldo Conceição |
author_facet |
Cerqueira, Reginaldo Conceição Costa, Joaquim Miguel Chaves, Maria Manuela Rodrigues, João Domingos [UNESP] |
author_role |
author |
author2 |
Costa, Joaquim Miguel Chaves, Maria Manuela Rodrigues, João Domingos [UNESP] |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
Universidade do Estado da Bahia, Departamento de Ciências Humanas Instituto Superior de Agronomia - LEAF, Tapada da Ajuda Universidade Nova de Lisboa, Instituto de Tecnologia Química e Biológica, LEM Universidade Estadual Paulista (UNESP) |
dc.contributor.author.fl_str_mv |
Cerqueira, Reginaldo Conceição Costa, Joaquim Miguel Chaves, Maria Manuela Rodrigues, João Domingos [UNESP] |
dc.subject.por.fl_str_mv |
Chlorophyll a fluorescence Gas exchange Reactive oxigen species Vitis vinifera Water potential |
topic |
Chlorophyll a fluorescence Gas exchange Reactive oxigen species Vitis vinifera Water potential |
description |
This work aimed to compare two grapevine varieties grown in Portugal, Syrah and Touriga Nacional, in terms of their physiological and biochemical behavior in response to a cycle of severe water stress followed by rehydration. Vines were subjected to either continuous watering (FI) or not watered for 21 days and rehydrated after leaf water potential at predawn reach-1.1 MPa (NI). Observations took place at four stages: i) immediately before water withdrawal (day 0), ii) Maximum stress (day 21), iii) two days after rehydration (day 23) and iv) six days after rehydration (day 27). We measured leaf water potential at pre-dawn (Ψ<inf>pd</inf>) and at midday (Ψ<inf>md</inf>), stomatal conductance to water vapor (gs), net photosynthesis (An), transpiration (E), the sub-stomatal CO<inf>2</inf> concentration (ci) and chlorophyll a fluorescence. The contents of total chlorophyll content and hydrogen peroxide (H<inf>2</inf>O<inf>2</inf>) in leaves were determined as well. All parameters were negatively affected by water stress, except basal fluorescence (Fo). The recovery capacity in terms of water potential and leaf gas exchange was similar in both varieties but it proved incomplete, in particular for net photosynthesis. The variety 'Touriga Nacional' showed higher degradation of chlorophyll and higher levels of H<inf>2</inf>O<inf>2</inf> in leaves than the 'Syrah' variety, which may explain the high susceptibility of Touriga to leaf senescence and leaf drop under water stress conditions in the field. |
publishDate |
2015 |
dc.date.none.fl_str_mv |
2015-01-01 2022-04-29T07:26:28Z 2022-04-29T07:26:28Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.5039/agraria.v10i2a5045 Revista Brasileirade Ciencias Agrarias, v. 10, n. 2, p. 211-217, 2015. 1981-0997 1981-1160 http://hdl.handle.net/11449/228048 10.5039/agraria.v10i2a5045 2-s2.0-84943252109 |
url |
http://dx.doi.org/10.5039/agraria.v10i2a5045 http://hdl.handle.net/11449/228048 |
identifier_str_mv |
Revista Brasileirade Ciencias Agrarias, v. 10, n. 2, p. 211-217, 2015. 1981-0997 1981-1160 10.5039/agraria.v10i2a5045 2-s2.0-84943252109 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
Revista Brasileirade Ciencias Agrarias |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
211-217 |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1808128511792119808 |