Meteorological conditions, ozone concentration and leaf age affect gas exchange in Psidium guajava ‛Palumaʼ
Autor(a) principal: | |
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Data de Publicação: | 2017 |
Outros Autores: | , |
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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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 |
_version_ |
1754193647582052352 |