PHOTOSYNTHESIS IN EUCALYPTUS UNDER DIFFERENT ENVIRONMENTAL CONDITIONS - DOI: 10.13083/1414-3984/reveng.v23n4p336-345

Detalhes bibliográficos
Autor(a) principal: Tatagiba, Sandro Dan
Data de Publicação: 2015
Outros Autores: Pezzopane, José Eduardo Macedo, Reis, Edvaldo Fialho
Tipo de documento: Artigo
Idioma: por
Título da fonte: Engenharia na Agricultura
Texto Completo: https://periodicos.ufv.br/reveng/article/view/518
Resumo: The objective of this study was to evaluate the photosynthetic responses in a clonal plantation of Eucalyptus in two well-defined seasons: a drought due to water deficiency, and a rainy season with excess water in the soil. The experiment was conducted in the area of the company Fibria S.A, located in the region of Itauninhas, district of São Mateus-ES, mounted in a completely randomized design with two treatments (dry and rainy season) and 12 repetitions for gas exchange, chlorophyll a fluorescence and leaf water potential. According to the results, it was found that water stress in the dry season was sufficient to reduce the water content in plant tissues of the plants, causing a reduction in gs, and consequently decrease in A and E. The lower stomatal aperture during dry season contributed to a decrease in carbon assimilation, decreasing the productivity potential of the plants. The water shortage in the dry season caused no damage to the PS II photosynthetic apparatus, as shown by the ratio Fv/Fm, but reduced the efficiency of light energy capture by the PS II antenna complex, reducing the flow of electrons which may have contributed to reduction in A.
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spelling PHOTOSYNTHESIS IN EUCALYPTUS UNDER DIFFERENT ENVIRONMENTAL CONDITIONS - DOI: 10.13083/1414-3984/reveng.v23n4p336-345FOTOSSÍNTESE EM EUCALYPTUS SOB DIFERENTES CONDIÇÕES EDAFOCLIMÁTICAS - DOI: 10.13083/1414-3984/reveng.v23n4p336-345deficiência hídricaexcedente hídricofluorescência da clorofila atrocas gasosaseucaliptoThe objective of this study was to evaluate the photosynthetic responses in a clonal plantation of Eucalyptus in two well-defined seasons: a drought due to water deficiency, and a rainy season with excess water in the soil. The experiment was conducted in the area of the company Fibria S.A, located in the region of Itauninhas, district of São Mateus-ES, mounted in a completely randomized design with two treatments (dry and rainy season) and 12 repetitions for gas exchange, chlorophyll a fluorescence and leaf water potential. According to the results, it was found that water stress in the dry season was sufficient to reduce the water content in plant tissues of the plants, causing a reduction in gs, and consequently decrease in A and E. The lower stomatal aperture during dry season contributed to a decrease in carbon assimilation, decreasing the productivity potential of the plants. The water shortage in the dry season caused no damage to the PS II photosynthetic apparatus, as shown by the ratio Fv/Fm, but reduced the efficiency of light energy capture by the PS II antenna complex, reducing the flow of electrons which may have contributed to reduction in A.O objetivo deste trabalho foi avaliar as respostas fotossintéticas em um plantio clonal de eucalipto, em duas estações bem definidas: uma seca, decorrente de deficiência hídrica; e outra chuvosa, apresentando excedente hídrico no solo. O experimento foi conduzido em área de fomento da Fibria S.A, na região de Itauninhas, distrito do município de São Mateus-ES, montado em um delineamento experimental inteiramente casualizado, com dois tratamentos (estação seca e chuvosa) e 12 repetições para as trocas gasosas, fluorescência da clorofila a e potencial hídrico foliar. De acordo com os resultados obtidos, foi verificado que a deficiência hídrica encontrada na estação seca foi suficiente para diminuir o teor de água nos tecidos vegetais das plantas, provocando redução em gs e, consequentemente, queda em A e E. A menor abertura estomática durante estação seca contribuiu para queda na assimilação de carbono, diminuindo a produtividade potencial das plantas. A deficiência hídrica na estação seca não causou danos no aparato fotossintético do FS II, como mostrado pelo razão Fv/Fm, mas reduziu a eficiência de captação de energia luminosa pelo complexo antena do FS II, reduzindo o fluxo de elétrons, o que pode ter contribuído para a redução em A.Universidade Federal de Viçosa - UFV2015-08-28info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://periodicos.ufv.br/reveng/article/view/51810.13083/reveng.v23i4.573Engineering in Agriculture; Vol. 23 No. 4 (2015); 336-345Revista Engenharia na Agricultura - REVENG; v. 23 n. 4 (2015); 336-3452175-68131414-398410.13083/reveng.v23i4reponame:Engenharia na Agriculturainstname:Universidade Federal de Viçosa (UFV)instacron:UFVporhttps://periodicos.ufv.br/reveng/article/view/518/356Tatagiba, Sandro DanPezzopane, José Eduardo MacedoReis, Edvaldo Fialhoinfo:eu-repo/semantics/openAccess2023-01-19T13:22:37Zoai:ojs.periodicos.ufv.br:article/518Revistahttps://periodicos.ufv.br/revengPUBhttps://periodicos.ufv.br/reveng/oairevistaengenharianagricultura@gmail.com||andrerosa@ufv.br||tramitacao.reveng@gmail.com|| reveng@ufv.br2175-68131414-3984opendoar:2023-01-19T13:22:37Engenharia na Agricultura - Universidade Federal de Viçosa (UFV)false
dc.title.none.fl_str_mv PHOTOSYNTHESIS IN EUCALYPTUS UNDER DIFFERENT ENVIRONMENTAL CONDITIONS - DOI: 10.13083/1414-3984/reveng.v23n4p336-345
FOTOSSÍNTESE EM EUCALYPTUS SOB DIFERENTES CONDIÇÕES EDAFOCLIMÁTICAS - DOI: 10.13083/1414-3984/reveng.v23n4p336-345
title PHOTOSYNTHESIS IN EUCALYPTUS UNDER DIFFERENT ENVIRONMENTAL CONDITIONS - DOI: 10.13083/1414-3984/reveng.v23n4p336-345
spellingShingle PHOTOSYNTHESIS IN EUCALYPTUS UNDER DIFFERENT ENVIRONMENTAL CONDITIONS - DOI: 10.13083/1414-3984/reveng.v23n4p336-345
Tatagiba, Sandro Dan
deficiência hídrica
excedente hídrico
fluorescência da clorofila a
trocas gasosas
eucalipto
title_short PHOTOSYNTHESIS IN EUCALYPTUS UNDER DIFFERENT ENVIRONMENTAL CONDITIONS - DOI: 10.13083/1414-3984/reveng.v23n4p336-345
title_full PHOTOSYNTHESIS IN EUCALYPTUS UNDER DIFFERENT ENVIRONMENTAL CONDITIONS - DOI: 10.13083/1414-3984/reveng.v23n4p336-345
title_fullStr PHOTOSYNTHESIS IN EUCALYPTUS UNDER DIFFERENT ENVIRONMENTAL CONDITIONS - DOI: 10.13083/1414-3984/reveng.v23n4p336-345
title_full_unstemmed PHOTOSYNTHESIS IN EUCALYPTUS UNDER DIFFERENT ENVIRONMENTAL CONDITIONS - DOI: 10.13083/1414-3984/reveng.v23n4p336-345
title_sort PHOTOSYNTHESIS IN EUCALYPTUS UNDER DIFFERENT ENVIRONMENTAL CONDITIONS - DOI: 10.13083/1414-3984/reveng.v23n4p336-345
author Tatagiba, Sandro Dan
author_facet Tatagiba, Sandro Dan
Pezzopane, José Eduardo Macedo
Reis, Edvaldo Fialho
author_role author
author2 Pezzopane, José Eduardo Macedo
Reis, Edvaldo Fialho
author2_role author
author
dc.contributor.author.fl_str_mv Tatagiba, Sandro Dan
Pezzopane, José Eduardo Macedo
Reis, Edvaldo Fialho
dc.subject.por.fl_str_mv deficiência hídrica
excedente hídrico
fluorescência da clorofila a
trocas gasosas
eucalipto
topic deficiência hídrica
excedente hídrico
fluorescência da clorofila a
trocas gasosas
eucalipto
description The objective of this study was to evaluate the photosynthetic responses in a clonal plantation of Eucalyptus in two well-defined seasons: a drought due to water deficiency, and a rainy season with excess water in the soil. The experiment was conducted in the area of the company Fibria S.A, located in the region of Itauninhas, district of São Mateus-ES, mounted in a completely randomized design with two treatments (dry and rainy season) and 12 repetitions for gas exchange, chlorophyll a fluorescence and leaf water potential. According to the results, it was found that water stress in the dry season was sufficient to reduce the water content in plant tissues of the plants, causing a reduction in gs, and consequently decrease in A and E. The lower stomatal aperture during dry season contributed to a decrease in carbon assimilation, decreasing the productivity potential of the plants. The water shortage in the dry season caused no damage to the PS II photosynthetic apparatus, as shown by the ratio Fv/Fm, but reduced the efficiency of light energy capture by the PS II antenna complex, reducing the flow of electrons which may have contributed to reduction in A.
publishDate 2015
dc.date.none.fl_str_mv 2015-08-28
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://periodicos.ufv.br/reveng/article/view/518
10.13083/reveng.v23i4.573
url https://periodicos.ufv.br/reveng/article/view/518
identifier_str_mv 10.13083/reveng.v23i4.573
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv https://periodicos.ufv.br/reveng/article/view/518/356
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Universidade Federal de Viçosa - UFV
publisher.none.fl_str_mv Universidade Federal de Viçosa - UFV
dc.source.none.fl_str_mv Engineering in Agriculture; Vol. 23 No. 4 (2015); 336-345
Revista Engenharia na Agricultura - REVENG; v. 23 n. 4 (2015); 336-345
2175-6813
1414-3984
10.13083/reveng.v23i4
reponame:Engenharia na Agricultura
instname:Universidade Federal de Viçosa (UFV)
instacron:UFV
instname_str Universidade Federal de Viçosa (UFV)
instacron_str UFV
institution UFV
reponame_str Engenharia na Agricultura
collection Engenharia na Agricultura
repository.name.fl_str_mv Engenharia na Agricultura - Universidade Federal de Viçosa (UFV)
repository.mail.fl_str_mv revistaengenharianagricultura@gmail.com||andrerosa@ufv.br||tramitacao.reveng@gmail.com|| reveng@ufv.br
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