Salinity reduces carbon assimilation and the harvest index of cassava plants (Manihot esculenta Crantz)

Detalhes bibliográficos
Autor(a) principal: Cruz, Jailson Lopes
Data de Publicação: 2017
Outros Autores: Coelho Filho, Mauricio Antonio, Coelho, Eugenio Ferreira, Santos, Andrade Alves dos
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Acta Scientiarum. Agronomy (Online)
Texto Completo: http://www.periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/32952
Resumo:  This study was developed to evaluate the effects of salinity on the growth and gas exchange of cassava plants, cultivar Verdinha. The four concentrations of NaCl (mM) were as follows: 0, 20, 40, and 60. Under salinity, the lowest concentration of Na+ ions was observed in the tuberous roots; however, the dry matter of tuberous roots was reduced with an application of just 20 mM NaCl. The harvest index was reduced 50% with the highest salt concentration. Salinity reduced carbon assimilation (A), stomatal conductance (gs), transpiration, and the instantaneous water use efficiency. The correlation between gs and A was high and positive, showing that stomatal movement was one of the responsible for the lower A. Under salt stress, there was an increase in intercellular CO2 concentration, indicating the impairment of carbon metabolism. Based on the reduction of dry matter of the tuberous roots (reduction of 81% under 60 mM NaCl), it was concluded that cassava is sensitive to salinity. The growth of shoots and the absorbing roots were minimally affected by salinity, even in the situation where A was reduced; therefore, the sensitivity of cassava was related to the high sensitivity of the tuberous roots to the ionic and/or osmotic effects of salinity. Thus, tuberous roots can be the target organ in studies that aim to improve the tolerance of cassava to salinity. 
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spelling Salinity reduces carbon assimilation and the harvest index of cassava plants (Manihot esculenta Crantz)photosynthesisdry matterwater use efficiencyharvest indexrootshoot ratiosalt stress.fisiologia de plantas cultivadas This study was developed to evaluate the effects of salinity on the growth and gas exchange of cassava plants, cultivar Verdinha. The four concentrations of NaCl (mM) were as follows: 0, 20, 40, and 60. Under salinity, the lowest concentration of Na+ ions was observed in the tuberous roots; however, the dry matter of tuberous roots was reduced with an application of just 20 mM NaCl. The harvest index was reduced 50% with the highest salt concentration. Salinity reduced carbon assimilation (A), stomatal conductance (gs), transpiration, and the instantaneous water use efficiency. The correlation between gs and A was high and positive, showing that stomatal movement was one of the responsible for the lower A. Under salt stress, there was an increase in intercellular CO2 concentration, indicating the impairment of carbon metabolism. Based on the reduction of dry matter of the tuberous roots (reduction of 81% under 60 mM NaCl), it was concluded that cassava is sensitive to salinity. The growth of shoots and the absorbing roots were minimally affected by salinity, even in the situation where A was reduced; therefore, the sensitivity of cassava was related to the high sensitivity of the tuberous roots to the ionic and/or osmotic effects of salinity. Thus, tuberous roots can be the target organ in studies that aim to improve the tolerance of cassava to salinity. Universidade Estadual de Maringá2017-08-11info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionPesquisa experimental; Pesquisa científicaapplication/pdfhttp://www.periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/3295210.4025/actasciagron.v39i4.32952Acta Scientiarum. Agronomy; Vol 39 No 4 (2017); 545-555Acta Scientiarum. Agronomy; v. 39 n. 4 (2017); 545-5551807-86211679-9275reponame:Acta Scientiarum. Agronomy (Online)instname:Universidade Estadual de Maringá (UEM)instacron:UEMenghttp://www.periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/32952/pdf_1Copyright (c) 2017 Acta Scientiarum. Agronomyinfo:eu-repo/semantics/openAccessCruz, Jailson LopesCoelho Filho, Mauricio AntonioCoelho, Eugenio FerreiraSantos, Andrade Alves dos2022-02-16T21:47:14Zoai:periodicos.uem.br/ojs:article/32952Revistahttp://www.periodicos.uem.br/ojs/index.php/ActaSciAgronPUBhttp://www.periodicos.uem.br/ojs/index.php/ActaSciAgron/oaiactaagron@uem.br||actaagron@uem.br|| edamasio@uem.br1807-86211679-9275opendoar:2022-02-16T21:47:14Acta Scientiarum. Agronomy (Online) - Universidade Estadual de Maringá (UEM)false
dc.title.none.fl_str_mv Salinity reduces carbon assimilation and the harvest index of cassava plants (Manihot esculenta Crantz)
title Salinity reduces carbon assimilation and the harvest index of cassava plants (Manihot esculenta Crantz)
spellingShingle Salinity reduces carbon assimilation and the harvest index of cassava plants (Manihot esculenta Crantz)
Cruz, Jailson Lopes
photosynthesis
dry matter
water use efficiency
harvest index
root
shoot ratio
salt stress.
fisiologia de plantas cultivadas
title_short Salinity reduces carbon assimilation and the harvest index of cassava plants (Manihot esculenta Crantz)
title_full Salinity reduces carbon assimilation and the harvest index of cassava plants (Manihot esculenta Crantz)
title_fullStr Salinity reduces carbon assimilation and the harvest index of cassava plants (Manihot esculenta Crantz)
title_full_unstemmed Salinity reduces carbon assimilation and the harvest index of cassava plants (Manihot esculenta Crantz)
title_sort Salinity reduces carbon assimilation and the harvest index of cassava plants (Manihot esculenta Crantz)
author Cruz, Jailson Lopes
author_facet Cruz, Jailson Lopes
Coelho Filho, Mauricio Antonio
Coelho, Eugenio Ferreira
Santos, Andrade Alves dos
author_role author
author2 Coelho Filho, Mauricio Antonio
Coelho, Eugenio Ferreira
Santos, Andrade Alves dos
author2_role author
author
author
dc.contributor.author.fl_str_mv Cruz, Jailson Lopes
Coelho Filho, Mauricio Antonio
Coelho, Eugenio Ferreira
Santos, Andrade Alves dos
dc.subject.por.fl_str_mv photosynthesis
dry matter
water use efficiency
harvest index
root
shoot ratio
salt stress.
fisiologia de plantas cultivadas
topic photosynthesis
dry matter
water use efficiency
harvest index
root
shoot ratio
salt stress.
fisiologia de plantas cultivadas
description  This study was developed to evaluate the effects of salinity on the growth and gas exchange of cassava plants, cultivar Verdinha. The four concentrations of NaCl (mM) were as follows: 0, 20, 40, and 60. Under salinity, the lowest concentration of Na+ ions was observed in the tuberous roots; however, the dry matter of tuberous roots was reduced with an application of just 20 mM NaCl. The harvest index was reduced 50% with the highest salt concentration. Salinity reduced carbon assimilation (A), stomatal conductance (gs), transpiration, and the instantaneous water use efficiency. The correlation between gs and A was high and positive, showing that stomatal movement was one of the responsible for the lower A. Under salt stress, there was an increase in intercellular CO2 concentration, indicating the impairment of carbon metabolism. Based on the reduction of dry matter of the tuberous roots (reduction of 81% under 60 mM NaCl), it was concluded that cassava is sensitive to salinity. The growth of shoots and the absorbing roots were minimally affected by salinity, even in the situation where A was reduced; therefore, the sensitivity of cassava was related to the high sensitivity of the tuberous roots to the ionic and/or osmotic effects of salinity. Thus, tuberous roots can be the target organ in studies that aim to improve the tolerance of cassava to salinity. 
publishDate 2017
dc.date.none.fl_str_mv 2017-08-11
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Pesquisa experimental; Pesquisa científica
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://www.periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/32952
10.4025/actasciagron.v39i4.32952
url http://www.periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/32952
identifier_str_mv 10.4025/actasciagron.v39i4.32952
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv http://www.periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/32952/pdf_1
dc.rights.driver.fl_str_mv Copyright (c) 2017 Acta Scientiarum. Agronomy
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Copyright (c) 2017 Acta Scientiarum. Agronomy
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Universidade Estadual de Maringá
publisher.none.fl_str_mv Universidade Estadual de Maringá
dc.source.none.fl_str_mv Acta Scientiarum. Agronomy; Vol 39 No 4 (2017); 545-555
Acta Scientiarum. Agronomy; v. 39 n. 4 (2017); 545-555
1807-8621
1679-9275
reponame:Acta Scientiarum. Agronomy (Online)
instname:Universidade Estadual de Maringá (UEM)
instacron:UEM
instname_str Universidade Estadual de Maringá (UEM)
instacron_str UEM
institution UEM
reponame_str Acta Scientiarum. Agronomy (Online)
collection Acta Scientiarum. Agronomy (Online)
repository.name.fl_str_mv Acta Scientiarum. Agronomy (Online) - Universidade Estadual de Maringá (UEM)
repository.mail.fl_str_mv actaagron@uem.br||actaagron@uem.br|| edamasio@uem.br
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