Gas exchange in young plants of the species Tabebuia aurea exposed to conditions of induced water stress

Detalhes bibliográficos
Autor(a) principal: Morbeck de Oliveira, Ademir Kleber
Data de Publicação: 2017
Outros Autores: Gualtieri, Sônia Cristina Juliano
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Bioscience journal (Online)
Texto Completo: https://seer.ufu.br/index.php/biosciencejournal/article/view/32820
Resumo: The paratudo, Tabebuia aurea, is a common Brazilian tree from the Pantanal wetland from Miranda, Mato Grosso do Sul, an area with hydric seasonality. To evaluate the effects of water stress on CO2 exchange, ten-month-old T. aurea seedlings cultivated in planting bags were subjected to water stress by suppressing irrigation for 23 days. Stomatal conductance, transpiration rate, and photosynthetic rate were measured during the stress and recovery period, totaling 28 days, using an infrared portable analyzer. After 23 days without irrigation, the transpiration, stomatal conductance, and net photosynthesis rates in leaflets were zero, while the leaflets water potential reached -2.6 MPa. After this point, daily irrigation was resumed, and the values of the measured variables recovered to the initial levels after 96 hours (transpiration rate from 2.0 to 2.6 mmol m-2 s-1; stomatal conductance rate from 0.12 to 0.18 mol m-2 s-1 and photosynthesis rate from 8.1 to 9.5 µmol m-2 s-1). Furthermore, the hydric potential values were similar to those observed at the beginning of the experiment (-0.5 MPa). The results showed that T. aurea has tolerance to drought, allowing their survival in areas subjected to periodic water stress.
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spelling Gas exchange in young plants of the species Tabebuia aurea exposed to conditions of induced water stress Trocas gasosas em plantas jovens de Tabebuia aurea submetidas a condições de estresse hídrico induzidoHydric DeficitPhotosynthesisStomatal ConductanceParatudoDéficit hídricoFotossínteseCondutância estomáticaParatudoThe paratudo, Tabebuia aurea, is a common Brazilian tree from the Pantanal wetland from Miranda, Mato Grosso do Sul, an area with hydric seasonality. To evaluate the effects of water stress on CO2 exchange, ten-month-old T. aurea seedlings cultivated in planting bags were subjected to water stress by suppressing irrigation for 23 days. Stomatal conductance, transpiration rate, and photosynthetic rate were measured during the stress and recovery period, totaling 28 days, using an infrared portable analyzer. After 23 days without irrigation, the transpiration, stomatal conductance, and net photosynthesis rates in leaflets were zero, while the leaflets water potential reached -2.6 MPa. After this point, daily irrigation was resumed, and the values of the measured variables recovered to the initial levels after 96 hours (transpiration rate from 2.0 to 2.6 mmol m-2 s-1; stomatal conductance rate from 0.12 to 0.18 mol m-2 s-1 and photosynthesis rate from 8.1 to 9.5 µmol m-2 s-1). Furthermore, the hydric potential values were similar to those observed at the beginning of the experiment (-0.5 MPa). The results showed that T. aurea has tolerance to drought, allowing their survival in areas subjected to periodic water stress.O paratudo, Tabebuia aurea, é uma árvore comumente encontrada no Pantanal de Miranda, Mato Grosso do Sul, uma área com sazonalidade hídrica. Para avaliar o efeito do estresse hídrico sobre as trocas gasosas de CO2, plantas com 10 meses de idade de T. aurea cultivadas em sacos de plantio foram submetidas a estresse hídrico através da supressão de irrigação por 23 dias. Condutância estomática, transpiração e fotossíntese líquida foram medidas durante o período de estresse e recuperação, totalizando 28 dias, com um analisador portátil de gás infravermelho. Depois de 23 dias sem irrigação, as taxas de transpiração, condutância e fotossíntese nas folhas chegaram a zero, enquanto o potencial hídrico das folhas, -2.6 MPa. Depois deste ponto, a irrigação foi retomada e os valores médios das variáveis avaliadas, depois de 96 h, voltaram aos valores iniciais (taxa de transpiração entre 2.0 e 2.6 mmol m-2 s-1; taxa de condutância estomática entre 0.12 e 0.18 mol m-2 s-1 e taxa fotossintética entre 8.1 e 9.5 µmol m-2 s-1). O potencial hídrico também retornou aos valores do início do experimento (-0.5 MPa). Os resultados demonstraram que T. aurea possui tolerância a períodos de seca, permitindo sua sobrevivência em áreas sujeitas a estresse hídrico periódico.EDUFU2017-03-30info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.ufu.br/index.php/biosciencejournal/article/view/3282010.14393/BJ-v33n2-32820Bioscience Journal ; Vol. 33 No. 2 (2017): Mar./Apr.Bioscience Journal ; v. 33 n. 2 (2017): Mar./Apr.1981-3163reponame:Bioscience journal (Online)instname:Universidade Federal de Uberlândia (UFU)instacron:UFUenghttps://seer.ufu.br/index.php/biosciencejournal/article/view/32820/20007Copyright (c) 2017 Ademir Kleber Morbeck de Oliveira, Sônia Cristina Juliano Gualtierihttps://creativecommons.org/licenses/by/4.0info:eu-repo/semantics/openAccessMorbeck de Oliveira, Ademir KleberGualtieri, Sônia Cristina Juliano2022-01-03T16:22:14Zoai:ojs.www.seer.ufu.br:article/32820Revistahttps://seer.ufu.br/index.php/biosciencejournalPUBhttps://seer.ufu.br/index.php/biosciencejournal/oaibiosciencej@ufu.br||1981-31631516-3725opendoar:2022-01-03T16:22:14Bioscience journal (Online) - Universidade Federal de Uberlândia (UFU)false
dc.title.none.fl_str_mv Gas exchange in young plants of the species Tabebuia aurea exposed to conditions of induced water stress
Trocas gasosas em plantas jovens de Tabebuia aurea submetidas a condições de estresse hídrico induzido
title Gas exchange in young plants of the species Tabebuia aurea exposed to conditions of induced water stress
spellingShingle Gas exchange in young plants of the species Tabebuia aurea exposed to conditions of induced water stress
Morbeck de Oliveira, Ademir Kleber
Hydric Deficit
Photosynthesis
Stomatal Conductance
Paratudo
Déficit hídrico
Fotossíntese
Condutância estomática
Paratudo
title_short Gas exchange in young plants of the species Tabebuia aurea exposed to conditions of induced water stress
title_full Gas exchange in young plants of the species Tabebuia aurea exposed to conditions of induced water stress
title_fullStr Gas exchange in young plants of the species Tabebuia aurea exposed to conditions of induced water stress
title_full_unstemmed Gas exchange in young plants of the species Tabebuia aurea exposed to conditions of induced water stress
title_sort Gas exchange in young plants of the species Tabebuia aurea exposed to conditions of induced water stress
author Morbeck de Oliveira, Ademir Kleber
author_facet Morbeck de Oliveira, Ademir Kleber
Gualtieri, Sônia Cristina Juliano
author_role author
author2 Gualtieri, Sônia Cristina Juliano
author2_role author
dc.contributor.author.fl_str_mv Morbeck de Oliveira, Ademir Kleber
Gualtieri, Sônia Cristina Juliano
dc.subject.por.fl_str_mv Hydric Deficit
Photosynthesis
Stomatal Conductance
Paratudo
Déficit hídrico
Fotossíntese
Condutância estomática
Paratudo
topic Hydric Deficit
Photosynthesis
Stomatal Conductance
Paratudo
Déficit hídrico
Fotossíntese
Condutância estomática
Paratudo
description The paratudo, Tabebuia aurea, is a common Brazilian tree from the Pantanal wetland from Miranda, Mato Grosso do Sul, an area with hydric seasonality. To evaluate the effects of water stress on CO2 exchange, ten-month-old T. aurea seedlings cultivated in planting bags were subjected to water stress by suppressing irrigation for 23 days. Stomatal conductance, transpiration rate, and photosynthetic rate were measured during the stress and recovery period, totaling 28 days, using an infrared portable analyzer. After 23 days without irrigation, the transpiration, stomatal conductance, and net photosynthesis rates in leaflets were zero, while the leaflets water potential reached -2.6 MPa. After this point, daily irrigation was resumed, and the values of the measured variables recovered to the initial levels after 96 hours (transpiration rate from 2.0 to 2.6 mmol m-2 s-1; stomatal conductance rate from 0.12 to 0.18 mol m-2 s-1 and photosynthesis rate from 8.1 to 9.5 µmol m-2 s-1). Furthermore, the hydric potential values were similar to those observed at the beginning of the experiment (-0.5 MPa). The results showed that T. aurea has tolerance to drought, allowing their survival in areas subjected to periodic water stress.
publishDate 2017
dc.date.none.fl_str_mv 2017-03-30
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv https://seer.ufu.br/index.php/biosciencejournal/article/view/32820
10.14393/BJ-v33n2-32820
url https://seer.ufu.br/index.php/biosciencejournal/article/view/32820
identifier_str_mv 10.14393/BJ-v33n2-32820
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv https://seer.ufu.br/index.php/biosciencejournal/article/view/32820/20007
dc.rights.driver.fl_str_mv Copyright (c) 2017 Ademir Kleber Morbeck de Oliveira, Sônia Cristina Juliano Gualtieri
https://creativecommons.org/licenses/by/4.0
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Copyright (c) 2017 Ademir Kleber Morbeck de Oliveira, Sônia Cristina Juliano Gualtieri
https://creativecommons.org/licenses/by/4.0
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv EDUFU
publisher.none.fl_str_mv EDUFU
dc.source.none.fl_str_mv Bioscience Journal ; Vol. 33 No. 2 (2017): Mar./Apr.
Bioscience Journal ; v. 33 n. 2 (2017): Mar./Apr.
1981-3163
reponame:Bioscience journal (Online)
instname:Universidade Federal de Uberlândia (UFU)
instacron:UFU
instname_str Universidade Federal de Uberlândia (UFU)
instacron_str UFU
institution UFU
reponame_str Bioscience journal (Online)
collection Bioscience journal (Online)
repository.name.fl_str_mv Bioscience journal (Online) - Universidade Federal de Uberlândia (UFU)
repository.mail.fl_str_mv biosciencej@ufu.br||
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