Influência do tratamento com silício em sementes de sorgo granífero submetidas a estresses abióticos

Detalhes bibliográficos
Autor(a) principal: Pinheiro, Paloma Rayane
Data de Publicação: 2019
Tipo de documento: Dissertação
Idioma: por
Título da fonte: Repositório Institucional da Universidade Federal do Ceará (UFC)
dARK ID: ark:/83112/0013000000b1w
Texto Completo: http://www.repositorio.ufc.br/handle/riufc/48916
Resumo: In the field sorghum seeds are exposed to various environmental factors that can lead to stress, among which we have water stress and saline. Silicon (Si) due to its accumulation in the cell wall can bring several benefits to plants and serve as an attenuator to these stresses. The objective of this study was to evaluate the induction of silicon tolerance in sorghum seeds submitted to abiotic stress. For silicon treatments, Sifol® (potassium silicate) was used in five doses (0.0, 0.3, 0.6, 0.9 and 1.2 g / L). For water stress simulation, the seeds were submitted to polyethylene glycol (PEG 6000) at concentrations of 0.0, -0.2, -0.4, -0.6 and -0.8 MPa and, for saline stress, sodium chloride (NaCl) was used at concentrations of 0, 75, 150 and 225 mM. The variables analyzed were: germination, first germination count, shoot and root length, shoot / root ratio and seedling dry mass. For germination, when subjected to saline stress there was reduction for both genotypes and when subjected to water stress genotypes EA03 and EA955 maintained germination close to 90% until the level of - 0,4 MPa and -0,6 MPa, respectively. . In saline stress silicon treatment maintained the first germination count of genotype EA03 above 90% and genotype EA955 around 60% in the highest NaCl concentration. For water stress, both genotypes showed reduction in the values of the first count. There was a reduction in shoot length for both genotypes in both saline and water stress. For root length for both water and saline stress the tested genotypes presented the best values at the concentration of 0.9 g / L Si. With the increase of saline and water stress there was a reduction in the shoot / root ratio. For the dry mass at 225mM concentration in genotype EA03 the best dry mass values were verified at the concentration of 0.9 g / L Si already for EA955 and in all silicon treatments were around 6 mg. For water stress both genotypes had a dry mass of around 6 mg. Silicon positively influenced the physiology of granular sorghum seeds, with the concentrations of 0.6 and 0.9 g / L presenting the best results.
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spelling Influência do tratamento com silício em sementes de sorgo granífero submetidas a estresses abióticosInfluence of silicon treatment on graniforous sorgo seeds submitted to abiotic stressSorghum bicolorSifolSilicato de potássioEstresse hídricoEstresse salinoIn the field sorghum seeds are exposed to various environmental factors that can lead to stress, among which we have water stress and saline. Silicon (Si) due to its accumulation in the cell wall can bring several benefits to plants and serve as an attenuator to these stresses. The objective of this study was to evaluate the induction of silicon tolerance in sorghum seeds submitted to abiotic stress. For silicon treatments, Sifol® (potassium silicate) was used in five doses (0.0, 0.3, 0.6, 0.9 and 1.2 g / L). For water stress simulation, the seeds were submitted to polyethylene glycol (PEG 6000) at concentrations of 0.0, -0.2, -0.4, -0.6 and -0.8 MPa and, for saline stress, sodium chloride (NaCl) was used at concentrations of 0, 75, 150 and 225 mM. The variables analyzed were: germination, first germination count, shoot and root length, shoot / root ratio and seedling dry mass. For germination, when subjected to saline stress there was reduction for both genotypes and when subjected to water stress genotypes EA03 and EA955 maintained germination close to 90% until the level of - 0,4 MPa and -0,6 MPa, respectively. . In saline stress silicon treatment maintained the first germination count of genotype EA03 above 90% and genotype EA955 around 60% in the highest NaCl concentration. For water stress, both genotypes showed reduction in the values of the first count. There was a reduction in shoot length for both genotypes in both saline and water stress. For root length for both water and saline stress the tested genotypes presented the best values at the concentration of 0.9 g / L Si. With the increase of saline and water stress there was a reduction in the shoot / root ratio. For the dry mass at 225mM concentration in genotype EA03 the best dry mass values were verified at the concentration of 0.9 g / L Si already for EA955 and in all silicon treatments were around 6 mg. For water stress both genotypes had a dry mass of around 6 mg. Silicon positively influenced the physiology of granular sorghum seeds, with the concentrations of 0.6 and 0.9 g / L presenting the best results.Em campo as sementes de sorgo estão expostas a vários fatores ambientais que podem levar a estresses, dentre estes temos o estresse hídrico e o salino. O silício (Si) devido ao seu acúmulo na parede celular pode trazer diversos benefícios as plantas e servir como atenuante a esses estresses. Objetivou-se avaliar a indução de tolerância por silício em sementes de sorgo submetidas aos estresses abióticos. Para os tratamentos com silício foi utilizado a Sifol® (silicato de potássio), em cinco doses (0,0, 0,3, 0,6, 0,9 e 1,2 g/L). Para simulação de estresse hídrico, as sementes foram submetidas ao polietilenoglicol (PEG 6000) nas concentrações de 0,0, -0,2, -0,4, -0,6 e -0,8 MPa e, para o estresse salino, utilizou-se o cloreto de sódio (NaCl) nas concentrações de 0, 75, 150 e 225 mM. As variáveis analisadas foram as seguintes: germinação, primeira contagem de germinação, comprimento da parte aérea e da raiz, relação parte aérea/raiz e massa seca de plântulas. Para a germinação, quando submetidas ao estresse salino houve redução para os dois genótipos e quando submetidos ao estresse hídrico os genótipos EA03 e EA955 mantiveram a germinação próximo a 90% até o nível de -0,4 MPa e -0,6 MPa, respectivamente. No estresse salino o tratamento com silício manteve a primeira contagem de germinação do genótipo EA03 acima de 90% e a do genótipo EA955 em torno de 60% na maior concentração de NaCl. Já para o estresse hídrico, os dois genótipos apresentaram redução nos valores da primeira contagem. Houve redução no comprimento da parte aérea para os dois genótipos tanto no estresse salino como no hídrico. Para o comprimento de raiz tanto para o estresse hídrico como o salino os genótipos testados apresentaram os melhores valores na concentração de 0,9 g/L de Si. Com o aumento do estresse salino e do hídrico houve redução na relação parte aérea/raiz. Para a massa seca na concentração de 225mM no genótipo EA03 os melhores valores de massa seca foram verificados na concentração de 0,9 g/L de Si já para o EA955 e em todos os tratamentos com silício ficaram em torno de 6 mg. Para o estresse hídrico os dois genótipos ficaram com massa seca em torno de 6 mg. O silício influenciou de forma positiva a fisiologia de sementes de sorgo granífero, sendo as concentrações de 0,6 e 0,9 g/L as que apresentaram os melhores resultados.Dutra, Alek SandroPinheiro, Paloma Rayane2019-12-19T11:20:57Z2019-12-19T11:20:57Z2019info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfPINHEIRO, Paloma Rayane. Influência do tratamento com silício em sementes de sorgo granífero submetidas a estresses abióticos. 2019. 40 f. Dissertação (Mestrado em Agronomia Fitotecnia) – Universidade Federal do Ceará, Fortaleza, 2019.http://www.repositorio.ufc.br/handle/riufc/48916ark:/83112/0013000000b1wporreponame:Repositório Institucional da Universidade Federal do Ceará (UFC)instname:Universidade Federal do Ceará (UFC)instacron:UFCinfo:eu-repo/semantics/openAccess2019-12-19T11:23:12Zoai:repositorio.ufc.br:riufc/48916Repositório InstitucionalPUBhttp://www.repositorio.ufc.br/ri-oai/requestbu@ufc.br || repositorio@ufc.bropendoar:2024-09-11T19:00:04.597703Repositório Institucional da Universidade Federal do Ceará (UFC) - Universidade Federal do Ceará (UFC)false
dc.title.none.fl_str_mv Influência do tratamento com silício em sementes de sorgo granífero submetidas a estresses abióticos
Influence of silicon treatment on graniforous sorgo seeds submitted to abiotic stress
title Influência do tratamento com silício em sementes de sorgo granífero submetidas a estresses abióticos
spellingShingle Influência do tratamento com silício em sementes de sorgo granífero submetidas a estresses abióticos
Pinheiro, Paloma Rayane
Sorghum bicolor
Sifol
Silicato de potássio
Estresse hídrico
Estresse salino
title_short Influência do tratamento com silício em sementes de sorgo granífero submetidas a estresses abióticos
title_full Influência do tratamento com silício em sementes de sorgo granífero submetidas a estresses abióticos
title_fullStr Influência do tratamento com silício em sementes de sorgo granífero submetidas a estresses abióticos
title_full_unstemmed Influência do tratamento com silício em sementes de sorgo granífero submetidas a estresses abióticos
title_sort Influência do tratamento com silício em sementes de sorgo granífero submetidas a estresses abióticos
author Pinheiro, Paloma Rayane
author_facet Pinheiro, Paloma Rayane
author_role author
dc.contributor.none.fl_str_mv Dutra, Alek Sandro
dc.contributor.author.fl_str_mv Pinheiro, Paloma Rayane
dc.subject.por.fl_str_mv Sorghum bicolor
Sifol
Silicato de potássio
Estresse hídrico
Estresse salino
topic Sorghum bicolor
Sifol
Silicato de potássio
Estresse hídrico
Estresse salino
description In the field sorghum seeds are exposed to various environmental factors that can lead to stress, among which we have water stress and saline. Silicon (Si) due to its accumulation in the cell wall can bring several benefits to plants and serve as an attenuator to these stresses. The objective of this study was to evaluate the induction of silicon tolerance in sorghum seeds submitted to abiotic stress. For silicon treatments, Sifol® (potassium silicate) was used in five doses (0.0, 0.3, 0.6, 0.9 and 1.2 g / L). For water stress simulation, the seeds were submitted to polyethylene glycol (PEG 6000) at concentrations of 0.0, -0.2, -0.4, -0.6 and -0.8 MPa and, for saline stress, sodium chloride (NaCl) was used at concentrations of 0, 75, 150 and 225 mM. The variables analyzed were: germination, first germination count, shoot and root length, shoot / root ratio and seedling dry mass. For germination, when subjected to saline stress there was reduction for both genotypes and when subjected to water stress genotypes EA03 and EA955 maintained germination close to 90% until the level of - 0,4 MPa and -0,6 MPa, respectively. . In saline stress silicon treatment maintained the first germination count of genotype EA03 above 90% and genotype EA955 around 60% in the highest NaCl concentration. For water stress, both genotypes showed reduction in the values of the first count. There was a reduction in shoot length for both genotypes in both saline and water stress. For root length for both water and saline stress the tested genotypes presented the best values at the concentration of 0.9 g / L Si. With the increase of saline and water stress there was a reduction in the shoot / root ratio. For the dry mass at 225mM concentration in genotype EA03 the best dry mass values were verified at the concentration of 0.9 g / L Si already for EA955 and in all silicon treatments were around 6 mg. For water stress both genotypes had a dry mass of around 6 mg. Silicon positively influenced the physiology of granular sorghum seeds, with the concentrations of 0.6 and 0.9 g / L presenting the best results.
publishDate 2019
dc.date.none.fl_str_mv 2019-12-19T11:20:57Z
2019-12-19T11:20:57Z
2019
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/masterThesis
format masterThesis
status_str publishedVersion
dc.identifier.uri.fl_str_mv PINHEIRO, Paloma Rayane. Influência do tratamento com silício em sementes de sorgo granífero submetidas a estresses abióticos. 2019. 40 f. Dissertação (Mestrado em Agronomia Fitotecnia) – Universidade Federal do Ceará, Fortaleza, 2019.
http://www.repositorio.ufc.br/handle/riufc/48916
dc.identifier.dark.fl_str_mv ark:/83112/0013000000b1w
identifier_str_mv PINHEIRO, Paloma Rayane. Influência do tratamento com silício em sementes de sorgo granífero submetidas a estresses abióticos. 2019. 40 f. Dissertação (Mestrado em Agronomia Fitotecnia) – Universidade Federal do Ceará, Fortaleza, 2019.
ark:/83112/0013000000b1w
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dc.source.none.fl_str_mv reponame:Repositório Institucional da Universidade Federal do Ceará (UFC)
instname:Universidade Federal do Ceará (UFC)
instacron:UFC
instname_str Universidade Federal do Ceará (UFC)
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institution UFC
reponame_str Repositório Institucional da Universidade Federal do Ceará (UFC)
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