Meteorological conditions, ozone concentration and leaf age affect gas exchange in Psidium guajava ‛Palumaʼ

Detalhes bibliográficos
Autor(a) principal: Pina,Juliana Moreno
Data de Publicação: 2017
Outros Autores: Meirelles,Sérgio Tadeu, Moraes,Regina Maria de
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Hoehnea
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S2236-89062017000200236
Resumo: ABSTRACT This study aimed to investigate the importance of leaf age, meteorological conditions and ozone concentration (O3) on gas exchange of Psidium guajava ‛Paluma'. Saplings were grown and exposed in standard conditions in the city of São Paulo, in six periods of three months with weekly measurements in young and mature leaves. Gas exchanges were higher in young leaves for almost the entire experiment. Mature leaves showed greater reduction in gas exchange. The multivariate analysis of biotic and abiotic variables indicated that vapor pressure deficit (VPD), O3 concentration and radiation were the main variables associated with gas exchange decrease in young leaves. In mature leaves the influence of VPD is lower, but the temperature importance is higher. Moreover, the opposition between assimilation and O3 is more evident in mature leaves, indicating their greater sensitivity to O3.
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spelling Meteorological conditions, ozone concentration and leaf age affect gas exchange in Psidium guajava ‛Palumaʼcarbon assimilationozone phytotoxicitystomatal conductanceABSTRACT This study aimed to investigate the importance of leaf age, meteorological conditions and ozone concentration (O3) on gas exchange of Psidium guajava ‛Paluma'. Saplings were grown and exposed in standard conditions in the city of São Paulo, in six periods of three months with weekly measurements in young and mature leaves. Gas exchanges were higher in young leaves for almost the entire experiment. Mature leaves showed greater reduction in gas exchange. The multivariate analysis of biotic and abiotic variables indicated that vapor pressure deficit (VPD), O3 concentration and radiation were the main variables associated with gas exchange decrease in young leaves. In mature leaves the influence of VPD is lower, but the temperature importance is higher. Moreover, the opposition between assimilation and O3 is more evident in mature leaves, indicating their greater sensitivity to O3.Instituto de Pesquisas Ambientais2017-04-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S2236-89062017000200236Hoehnea v.44 n.2 2017reponame:Hoehneainstname:Instituto de Botânica (IBT)instacron:IBT10.1590/2236-8906-50/2016info:eu-repo/semantics/openAccessPina,Juliana MorenoMeirelles,Sérgio TadeuMoraes,Regina Maria deeng2017-06-08T00:00:00Zoai:scielo:S2236-89062017000200236Revistahttp://www.ibot.sp.gov.br/publicacoes/hoehnea/sobre_hoehnea.phpPUBhttps://old.scielo.br/oai/scielo-oai.php||hoehneaibt@gmail.com2236-89060073-2877opendoar:2017-06-08T00:00Hoehnea - Instituto de Botânica (IBT)false
dc.title.none.fl_str_mv Meteorological conditions, ozone concentration and leaf age affect gas exchange in Psidium guajava ‛Palumaʼ
title Meteorological conditions, ozone concentration and leaf age affect gas exchange in Psidium guajava ‛Palumaʼ
spellingShingle Meteorological conditions, ozone concentration and leaf age affect gas exchange in Psidium guajava ‛Palumaʼ
Pina,Juliana Moreno
carbon assimilation
ozone phytotoxicity
stomatal conductance
title_short Meteorological conditions, ozone concentration and leaf age affect gas exchange in Psidium guajava ‛Palumaʼ
title_full Meteorological conditions, ozone concentration and leaf age affect gas exchange in Psidium guajava ‛Palumaʼ
title_fullStr Meteorological conditions, ozone concentration and leaf age affect gas exchange in Psidium guajava ‛Palumaʼ
title_full_unstemmed Meteorological conditions, ozone concentration and leaf age affect gas exchange in Psidium guajava ‛Palumaʼ
title_sort Meteorological conditions, ozone concentration and leaf age affect gas exchange in Psidium guajava ‛Palumaʼ
author Pina,Juliana Moreno
author_facet Pina,Juliana Moreno
Meirelles,Sérgio Tadeu
Moraes,Regina Maria de
author_role author
author2 Meirelles,Sérgio Tadeu
Moraes,Regina Maria de
author2_role author
author
dc.contributor.author.fl_str_mv Pina,Juliana Moreno
Meirelles,Sérgio Tadeu
Moraes,Regina Maria de
dc.subject.por.fl_str_mv carbon assimilation
ozone phytotoxicity
stomatal conductance
topic carbon assimilation
ozone phytotoxicity
stomatal conductance
description ABSTRACT This study aimed to investigate the importance of leaf age, meteorological conditions and ozone concentration (O3) on gas exchange of Psidium guajava ‛Paluma'. Saplings were grown and exposed in standard conditions in the city of São Paulo, in six periods of three months with weekly measurements in young and mature leaves. Gas exchanges were higher in young leaves for almost the entire experiment. Mature leaves showed greater reduction in gas exchange. The multivariate analysis of biotic and abiotic variables indicated that vapor pressure deficit (VPD), O3 concentration and radiation were the main variables associated with gas exchange decrease in young leaves. In mature leaves the influence of VPD is lower, but the temperature importance is higher. Moreover, the opposition between assimilation and O3 is more evident in mature leaves, indicating their greater sensitivity to O3.
publishDate 2017
dc.date.none.fl_str_mv 2017-04-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S2236-89062017000200236
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S2236-89062017000200236
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/2236-8906-50/2016
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Instituto de Pesquisas Ambientais
publisher.none.fl_str_mv Instituto de Pesquisas Ambientais
dc.source.none.fl_str_mv Hoehnea v.44 n.2 2017
reponame:Hoehnea
instname:Instituto de Botânica (IBT)
instacron:IBT
instname_str Instituto de Botânica (IBT)
instacron_str IBT
institution IBT
reponame_str Hoehnea
collection Hoehnea
repository.name.fl_str_mv Hoehnea - Instituto de Botânica (IBT)
repository.mail.fl_str_mv ||hoehneaibt@gmail.com
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