Photosynthetic capacity and water use efficiency in sugarcane genotypes subject to water deficit during early growth phase

Detalhes bibliográficos
Autor(a) principal: Silva,Marcelo de Almeida
Data de Publicação: 2013
Outros Autores: Jifon,John Lonfover, Santos,Claudiana Moura dos, Jadoski,Cleber Junior, Silva,Jorge Alberto Gonçalves da
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Brazilian Archives of Biology and Technology
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132013000500004
Resumo: The objective of this study was to compare the gas exchange, photosynthetic capacity and water potential of sugarcane genotypes cultivated under water deficit conditions imposed during the initial growth phase. Experiments were performed in a greenhouse using two sugarcane genotypes namely: HoCP93-776 (drought susceptible) and TCP02-4587 (drought tolerant). Sixty days after planting, two different water treatments were applied (i.e., with or without water deficit). At 0,30 and 60 days after the treatment, gas exchange variables were evaluated for their relationship with water use, intrinsic instantaneous water use efficiency and instantaneous carboxylation efficiency. The SPAD index, photosynthetic pigments, water potential and relative water content in the leaves were also analyzed. The genotype HoCP93-776 was more sensitive to drought treatment as indicated by the significantly lower values of SPAD index, photosynthetic pigments, water potential (Ψw) and relative water content (RWC) variables. The genotype TCP02-4587 had higher water potential, stomatal control efficiency, water use efficiency (WUE), intrinsic instantaneous water use efficiency (WUEintr), instantaneous carboxylation efficiency and photosynthetic capacity. The highest air vapor pressure deficit during the drought conditions could be due to the stomatal closing in the HoCP93-776, which contributed to its lower photosynthetic capacity.
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spelling Photosynthetic capacity and water use efficiency in sugarcane genotypes subject to water deficit during early growth phaseSaccharum spp.photosynthesisstomatal conductancechlorophylldrought tolerancewater potentialThe objective of this study was to compare the gas exchange, photosynthetic capacity and water potential of sugarcane genotypes cultivated under water deficit conditions imposed during the initial growth phase. Experiments were performed in a greenhouse using two sugarcane genotypes namely: HoCP93-776 (drought susceptible) and TCP02-4587 (drought tolerant). Sixty days after planting, two different water treatments were applied (i.e., with or without water deficit). At 0,30 and 60 days after the treatment, gas exchange variables were evaluated for their relationship with water use, intrinsic instantaneous water use efficiency and instantaneous carboxylation efficiency. The SPAD index, photosynthetic pigments, water potential and relative water content in the leaves were also analyzed. The genotype HoCP93-776 was more sensitive to drought treatment as indicated by the significantly lower values of SPAD index, photosynthetic pigments, water potential (Ψw) and relative water content (RWC) variables. The genotype TCP02-4587 had higher water potential, stomatal control efficiency, water use efficiency (WUE), intrinsic instantaneous water use efficiency (WUEintr), instantaneous carboxylation efficiency and photosynthetic capacity. The highest air vapor pressure deficit during the drought conditions could be due to the stomatal closing in the HoCP93-776, which contributed to its lower photosynthetic capacity.Instituto de Tecnologia do Paraná - Tecpar2013-10-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132013000500004Brazilian Archives of Biology and Technology v.56 n.5 2013reponame:Brazilian Archives of Biology and Technologyinstname:Instituto de Tecnologia do Paraná (Tecpar)instacron:TECPAR10.1590/S1516-89132013000500004info:eu-repo/semantics/openAccessSilva,Marcelo de AlmeidaJifon,John LonfoverSantos,Claudiana Moura dosJadoski,Cleber JuniorSilva,Jorge Alberto Gonçalves daeng2013-10-31T00:00:00Zoai:scielo:S1516-89132013000500004Revistahttps://www.scielo.br/j/babt/https://old.scielo.br/oai/scielo-oai.phpbabt@tecpar.br||babt@tecpar.br1678-43241516-8913opendoar:2013-10-31T00:00Brazilian Archives of Biology and Technology - Instituto de Tecnologia do Paraná (Tecpar)false
dc.title.none.fl_str_mv Photosynthetic capacity and water use efficiency in sugarcane genotypes subject to water deficit during early growth phase
title Photosynthetic capacity and water use efficiency in sugarcane genotypes subject to water deficit during early growth phase
spellingShingle Photosynthetic capacity and water use efficiency in sugarcane genotypes subject to water deficit during early growth phase
Silva,Marcelo de Almeida
Saccharum spp.
photosynthesis
stomatal conductance
chlorophyll
drought tolerance
water potential
title_short Photosynthetic capacity and water use efficiency in sugarcane genotypes subject to water deficit during early growth phase
title_full Photosynthetic capacity and water use efficiency in sugarcane genotypes subject to water deficit during early growth phase
title_fullStr Photosynthetic capacity and water use efficiency in sugarcane genotypes subject to water deficit during early growth phase
title_full_unstemmed Photosynthetic capacity and water use efficiency in sugarcane genotypes subject to water deficit during early growth phase
title_sort Photosynthetic capacity and water use efficiency in sugarcane genotypes subject to water deficit during early growth phase
author Silva,Marcelo de Almeida
author_facet Silva,Marcelo de Almeida
Jifon,John Lonfover
Santos,Claudiana Moura dos
Jadoski,Cleber Junior
Silva,Jorge Alberto Gonçalves da
author_role author
author2 Jifon,John Lonfover
Santos,Claudiana Moura dos
Jadoski,Cleber Junior
Silva,Jorge Alberto Gonçalves da
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Silva,Marcelo de Almeida
Jifon,John Lonfover
Santos,Claudiana Moura dos
Jadoski,Cleber Junior
Silva,Jorge Alberto Gonçalves da
dc.subject.por.fl_str_mv Saccharum spp.
photosynthesis
stomatal conductance
chlorophyll
drought tolerance
water potential
topic Saccharum spp.
photosynthesis
stomatal conductance
chlorophyll
drought tolerance
water potential
description The objective of this study was to compare the gas exchange, photosynthetic capacity and water potential of sugarcane genotypes cultivated under water deficit conditions imposed during the initial growth phase. Experiments were performed in a greenhouse using two sugarcane genotypes namely: HoCP93-776 (drought susceptible) and TCP02-4587 (drought tolerant). Sixty days after planting, two different water treatments were applied (i.e., with or without water deficit). At 0,30 and 60 days after the treatment, gas exchange variables were evaluated for their relationship with water use, intrinsic instantaneous water use efficiency and instantaneous carboxylation efficiency. The SPAD index, photosynthetic pigments, water potential and relative water content in the leaves were also analyzed. The genotype HoCP93-776 was more sensitive to drought treatment as indicated by the significantly lower values of SPAD index, photosynthetic pigments, water potential (Ψw) and relative water content (RWC) variables. The genotype TCP02-4587 had higher water potential, stomatal control efficiency, water use efficiency (WUE), intrinsic instantaneous water use efficiency (WUEintr), instantaneous carboxylation efficiency and photosynthetic capacity. The highest air vapor pressure deficit during the drought conditions could be due to the stomatal closing in the HoCP93-776, which contributed to its lower photosynthetic capacity.
publishDate 2013
dc.date.none.fl_str_mv 2013-10-01
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=S1516-89132013000500004
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132013000500004
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S1516-89132013000500004
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 Tecnologia do Paraná - Tecpar
publisher.none.fl_str_mv Instituto de Tecnologia do Paraná - Tecpar
dc.source.none.fl_str_mv Brazilian Archives of Biology and Technology v.56 n.5 2013
reponame:Brazilian Archives of Biology and Technology
instname:Instituto de Tecnologia do Paraná (Tecpar)
instacron:TECPAR
instname_str Instituto de Tecnologia do Paraná (Tecpar)
instacron_str TECPAR
institution TECPAR
reponame_str Brazilian Archives of Biology and Technology
collection Brazilian Archives of Biology and Technology
repository.name.fl_str_mv Brazilian Archives of Biology and Technology - Instituto de Tecnologia do Paraná (Tecpar)
repository.mail.fl_str_mv babt@tecpar.br||babt@tecpar.br
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