Chlorophyll a fluorescence in saccharine sorghum irrigated with saline water

Detalhes bibliográficos
Autor(a) principal: Monteiro,Danilo R.
Data de Publicação: 2018
Outros Autores: Melo,Hidelblandi F. de, Lins,Cintia M. T., Dourado,Pablo R. M., Santos,Hugo R. B., Souza,Edivan R. de
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Revista Brasileira de Engenharia Agrícola e Ambiental (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018001000673
Resumo: ABSTRACT Soil salinity directly affects plants, interfering in the emission of fluorescence, and promoting the degradation of photosynthetic pigments. Thus, estimating the damage to the photosynthetic apparatus caused by saline water is an important tool to detect abiotic stresses. For this purpose, sorghum plants were cultivated in a greenhouse and irrigated with two water sources (NaCl and salt mixture) with six levels of electrical conductivity (EC) (0, 2.5, 5, 7.5, 10, and 12.5 dS m-1), forming a 6 × 2 factorial in randomized blocks with four repetitions. At 60 days after sowing, the photosynthetic pigments were quantified, the chlorophyll a fluorescence parameters (initial fluorescence [F0]; variable fluorescence [Fv]; maximum fluorescence [Fm]; quantum efficiency of photosystem II - PSII [Fv/Fm]; electron flux per reaction center [ET0/CR]; quantum energy dissipation [DI0/CR] and quantum yield for heat dissipation [φD0]) were evaluated. The photosynthetic pigments were decreased with an increase in the salinity of the irrigation water, and were more expressive at higher electrical conductivities. With the wear on the photosynthetic apparatus by the increase in salinity, a reduction in the emission of the chlorophyll a fluorescence was observed, pointing to a possible photoinhibition of photosystem II.
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spelling Chlorophyll a fluorescence in saccharine sorghum irrigated with saline watersalinityphotosynthetic pigmentsphotochemical efficiencyABSTRACT Soil salinity directly affects plants, interfering in the emission of fluorescence, and promoting the degradation of photosynthetic pigments. Thus, estimating the damage to the photosynthetic apparatus caused by saline water is an important tool to detect abiotic stresses. For this purpose, sorghum plants were cultivated in a greenhouse and irrigated with two water sources (NaCl and salt mixture) with six levels of electrical conductivity (EC) (0, 2.5, 5, 7.5, 10, and 12.5 dS m-1), forming a 6 × 2 factorial in randomized blocks with four repetitions. At 60 days after sowing, the photosynthetic pigments were quantified, the chlorophyll a fluorescence parameters (initial fluorescence [F0]; variable fluorescence [Fv]; maximum fluorescence [Fm]; quantum efficiency of photosystem II - PSII [Fv/Fm]; electron flux per reaction center [ET0/CR]; quantum energy dissipation [DI0/CR] and quantum yield for heat dissipation [φD0]) were evaluated. The photosynthetic pigments were decreased with an increase in the salinity of the irrigation water, and were more expressive at higher electrical conductivities. With the wear on the photosynthetic apparatus by the increase in salinity, a reduction in the emission of the chlorophyll a fluorescence was observed, pointing to a possible photoinhibition of photosystem II.Departamento de Engenharia Agrícola - UFCG2018-10-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018001000673Revista Brasileira de Engenharia Agrícola e Ambiental v.22 n.10 2018reponame:Revista Brasileira de Engenharia Agrícola e Ambiental (Online)instname:Universidade Federal de Campina Grande (UFCG)instacron:UFCG10.1590/1807-1929/agriambi.v22n10p673-678info:eu-repo/semantics/openAccessMonteiro,Danilo R.Melo,Hidelblandi F. deLins,Cintia M. T.Dourado,Pablo R. M.Santos,Hugo R. B.Souza,Edivan R. deeng2018-09-20T00:00:00Zoai:scielo:S1415-43662018001000673Revistahttp://www.scielo.br/rbeaaPUBhttps://old.scielo.br/oai/scielo-oai.php||agriambi@agriambi.com.br1807-19291415-4366opendoar:2018-09-20T00:00Revista Brasileira de Engenharia Agrícola e Ambiental (Online) - Universidade Federal de Campina Grande (UFCG)false
dc.title.none.fl_str_mv Chlorophyll a fluorescence in saccharine sorghum irrigated with saline water
title Chlorophyll a fluorescence in saccharine sorghum irrigated with saline water
spellingShingle Chlorophyll a fluorescence in saccharine sorghum irrigated with saline water
Monteiro,Danilo R.
salinity
photosynthetic pigments
photochemical efficiency
title_short Chlorophyll a fluorescence in saccharine sorghum irrigated with saline water
title_full Chlorophyll a fluorescence in saccharine sorghum irrigated with saline water
title_fullStr Chlorophyll a fluorescence in saccharine sorghum irrigated with saline water
title_full_unstemmed Chlorophyll a fluorescence in saccharine sorghum irrigated with saline water
title_sort Chlorophyll a fluorescence in saccharine sorghum irrigated with saline water
author Monteiro,Danilo R.
author_facet Monteiro,Danilo R.
Melo,Hidelblandi F. de
Lins,Cintia M. T.
Dourado,Pablo R. M.
Santos,Hugo R. B.
Souza,Edivan R. de
author_role author
author2 Melo,Hidelblandi F. de
Lins,Cintia M. T.
Dourado,Pablo R. M.
Santos,Hugo R. B.
Souza,Edivan R. de
author2_role author
author
author
author
author
dc.contributor.author.fl_str_mv Monteiro,Danilo R.
Melo,Hidelblandi F. de
Lins,Cintia M. T.
Dourado,Pablo R. M.
Santos,Hugo R. B.
Souza,Edivan R. de
dc.subject.por.fl_str_mv salinity
photosynthetic pigments
photochemical efficiency
topic salinity
photosynthetic pigments
photochemical efficiency
description ABSTRACT Soil salinity directly affects plants, interfering in the emission of fluorescence, and promoting the degradation of photosynthetic pigments. Thus, estimating the damage to the photosynthetic apparatus caused by saline water is an important tool to detect abiotic stresses. For this purpose, sorghum plants were cultivated in a greenhouse and irrigated with two water sources (NaCl and salt mixture) with six levels of electrical conductivity (EC) (0, 2.5, 5, 7.5, 10, and 12.5 dS m-1), forming a 6 × 2 factorial in randomized blocks with four repetitions. At 60 days after sowing, the photosynthetic pigments were quantified, the chlorophyll a fluorescence parameters (initial fluorescence [F0]; variable fluorescence [Fv]; maximum fluorescence [Fm]; quantum efficiency of photosystem II - PSII [Fv/Fm]; electron flux per reaction center [ET0/CR]; quantum energy dissipation [DI0/CR] and quantum yield for heat dissipation [φD0]) were evaluated. The photosynthetic pigments were decreased with an increase in the salinity of the irrigation water, and were more expressive at higher electrical conductivities. With the wear on the photosynthetic apparatus by the increase in salinity, a reduction in the emission of the chlorophyll a fluorescence was observed, pointing to a possible photoinhibition of photosystem II.
publishDate 2018
dc.date.none.fl_str_mv 2018-10-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
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dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018001000673
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dc.language.iso.fl_str_mv eng
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dc.relation.none.fl_str_mv 10.1590/1807-1929/agriambi.v22n10p673-678
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dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Departamento de Engenharia Agrícola - UFCG
publisher.none.fl_str_mv Departamento de Engenharia Agrícola - UFCG
dc.source.none.fl_str_mv Revista Brasileira de Engenharia Agrícola e Ambiental v.22 n.10 2018
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instname_str Universidade Federal de Campina Grande (UFCG)
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