Óxido nítrico como agente mitigador do estresse salino em Physalis angulata l.
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Tipo de documento: | Dissertação |
Idioma: | por |
Título da fonte: | Biblioteca Digital de Teses e Dissertações da UEFS |
Texto Completo: | http://tede2.uefs.br:8080/handle/tede/1600 |
Resumo: | Saline stress can involve several actions in plant, mainly responses that induce stress tolerance, acting in a coordinated way, such as controlling water loss, osmotic adjustments, ionic homeostasis and antioxidant defense. However, for such responses, the stress perception by plant is necessary and thus, be transmitted to the protective inducing machinerythrough the action of the signaling agents. Nitric oxide (NO), due to its particular properties, is considered an important signaling molecule in face of stress conditions, playing an important role in the plants defense. Thus, the aim of this work was to evaluate the main biochemical and physiological responses of P. angulata plants under saline stress, as well as the role of the NO mitigating potential. The salt stress conditions were simulated in two experiments in a greenhouse with floating hydroponic system, containing five electrical conductivity levels of the nutrient solution - EC (EC0: 0.00; EC1: 1.80; EC2: 3.60; EC3: 5.40 and EC4: 7.2 dS m-1) in experiment I and sodium nitroprusside concentrations (SNP, 0, 25, 50, 75 and 100 μM), an exogenous NO donor, in experiment II. Water relations, gas exchange, sugars accumulation, proteins, amino acids, nitrate reductase activity in leaves and growth parameters were evaluated. Water relations (water potential and osmoprotectors) were affected mainly in plants under severe salt stress (7.2 dS m-1), as well as gas exchange, where the decrease in stomatal conductance at the highest levels of stress caused reductions in the photosynthetic rate, which consequently affected the growth of plants. It was observed that P. angulata plants adjusted osmotically, which accumulated sugars as a mechanism of acclimatization to salinity. The application of SNP mitigated the effects of salt stress on photosynthesis and nitrate reductase. Plants exposed to the stressor in the presence of SNP showed greater water potential and the damage caused by salt was reversed. NO reversed and/or attenuated the symptoms of salinity on plant growth, especially in the accumulation of dry matter and leaf area. Low concentrations of SNP are indicated to mitigate the negative effects of salt stress, promoting the improvement in photosynthetic rates, minimizing the decrease in leaf water potential and growth and pre-acclimatization with 65 μM is recommended for the cultivation of this species under saline environment. |
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Santana, José Raniere Ferreira de5551.554.485-49https://orcid.org/0000-0003-0186-6888http://lattes.cnpq.br/837165033057126104539302558http://lattes.cnpq.br/3627492836286024Silva, Alismário Leite da2023-12-18T15:45:29Z2020-06-15SILVA, Alismário Leite da. Óxido nítrico como agente mitigador do estresse salino em Physalis angulata l., 2020, 146 f., Dissertação (Mestrado) - Programa de Pós-Graduação em Recursos Genéticos Vegetais em Recursos Genéticos Vegetais, Universidade Estadual de Feira de Santana, Feira de Santana.http://tede2.uefs.br:8080/handle/tede/1600Saline stress can involve several actions in plant, mainly responses that induce stress tolerance, acting in a coordinated way, such as controlling water loss, osmotic adjustments, ionic homeostasis and antioxidant defense. However, for such responses, the stress perception by plant is necessary and thus, be transmitted to the protective inducing machinerythrough the action of the signaling agents. Nitric oxide (NO), due to its particular properties, is considered an important signaling molecule in face of stress conditions, playing an important role in the plants defense. Thus, the aim of this work was to evaluate the main biochemical and physiological responses of P. angulata plants under saline stress, as well as the role of the NO mitigating potential. The salt stress conditions were simulated in two experiments in a greenhouse with floating hydroponic system, containing five electrical conductivity levels of the nutrient solution - EC (EC0: 0.00; EC1: 1.80; EC2: 3.60; EC3: 5.40 and EC4: 7.2 dS m-1) in experiment I and sodium nitroprusside concentrations (SNP, 0, 25, 50, 75 and 100 μM), an exogenous NO donor, in experiment II. Water relations, gas exchange, sugars accumulation, proteins, amino acids, nitrate reductase activity in leaves and growth parameters were evaluated. Water relations (water potential and osmoprotectors) were affected mainly in plants under severe salt stress (7.2 dS m-1), as well as gas exchange, where the decrease in stomatal conductance at the highest levels of stress caused reductions in the photosynthetic rate, which consequently affected the growth of plants. It was observed that P. angulata plants adjusted osmotically, which accumulated sugars as a mechanism of acclimatization to salinity. The application of SNP mitigated the effects of salt stress on photosynthesis and nitrate reductase. Plants exposed to the stressor in the presence of SNP showed greater water potential and the damage caused by salt was reversed. NO reversed and/or attenuated the symptoms of salinity on plant growth, especially in the accumulation of dry matter and leaf area. Low concentrations of SNP are indicated to mitigate the negative effects of salt stress, promoting the improvement in photosynthetic rates, minimizing the decrease in leaf water potential and growth and pre-acclimatization with 65 μM is recommended for the cultivation of this species under saline environment.O estresse salino pode envolver diversas ações na planta, principalmente respostas que induzem a tolerância ao estresse, atuando de forma coordenada, como controle da perda de água, ajustes osmóticos, homeostase iônica e defesa antioxidante. No entanto, para tais respostas, é necessário que a planta perceba o estresse e, assim, possa ser transmitido para a maquinaria indutora de protetores através da atuação dos agentes sinalizadores. O óxido nítrico (NO), por apresentar propriedades particulares, é considerado uma importante molécula de sinalização frente a condições de estresses, desempenhando um importante papel em defesa das plantas. Dessa forma, objetivou-se avaliar as principais respostas bioquímicas e fisiológicas de plantas de P. angulata submetidas ao estresse salino, bem como o potencial do NO como mitigador. Para isso, as condições de estresse salino foram simuladas em dois experimentos em ambiente protegido, em sistema hidropônico do tipo floating, com cinco níveis de condutividade elétrica da solução nutritiva - CE (CE0: 0,00; CE1: 1,80; CE2: 3,60; CE3: 5,40 e CE4: 7,2 dS.m-1), no experimento I e concentrações de nitroprussiato de sódio (SNP, 0, 25, 50, 75 e 100 μM), um doador exógeno de NO, aplicado em plantas sob estresse salino (7,2 dS.m-1), no experimento II. Foi avaliado o potencial hídrico, as trocas gasosas, acúmulo de açúcares, proteínas, aminoácidos, atividade foliar da enzima redutase do nitrato e parâmetros de crescimento. As relações hídricas (potencial hídrico e osmoprotetores) foram afetadas principalmente nas plantas sob estresse salino severo (7,2 dS m-1), bem como as trocas gasosas, ocorrendo a diminuição da condutância estomática nos níveis mais elevados do estresse provocou reduções na taxa fotossintética, que consequentemente, afetou o crescimento das plantas. Observou-se que as plantas de P. angulata ajustaram-se osmoticamente, as quais acumularam açúcares como mecanismo de aclimatação a salinidade. A aplicação do SNP promoveu a mitigação dos efeitos do estresse salino sobre a fotossíntese e a redutase do nitrato. As plantas expostas ao agente estressor juntamente com o SNP apresentaram maior potencial hídrico e os danos promovidos pelo sal foram revertidos. O SNP reverteu e/ou atenuou os sintomas da salinidade sobre o crescimento das plantas, sobretudo no acúmulo de massa seca e área foliar. Baixas concentrações de SNP são indicadas para mitigar os efeitos negativos do estresse salino, promovendo a melhoria nas taxas fotossintéticas, minimizando o decréscimo do potencial hídrico foliar e crescimento, sendo recomendada a pré-aclimatação com 65 μM para o cultivo da espécie sob meio salino.Submitted by Daniela Costa (dmscosta@uefs.br) on 2023-12-18T15:45:29Z No. of bitstreams: 1 Alismário Leite da Silva - Dissertação.pdf: 1982516 bytes, checksum: 659fea43ede9399cc561b42d4a998136 (MD5)Made available in DSpace on 2023-12-18T15:45:29Z (GMT). No. of bitstreams: 1 Alismário Leite da Silva - Dissertação.pdf: 1982516 bytes, checksum: 659fea43ede9399cc561b42d4a998136 (MD5) Previous issue date: 2020-06-15Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPESapplication/pdfporUniversidade Estadual de Feira de SantanaMestrado Acadêmico em Recursos Genéticos VegetaisUEFSBrasilDEPARTAMENTO DE CIÊNCIAS BIOLÓGICASSinalizador celularAtenuação do estresse salinoCrescimentoTrocas gasosasCell signalingSaline stress attenuationGrowthGas exchangeCIENCIAS AGRARIASÓxido nítrico como agente mitigador do estresse salino em Physalis angulata l.info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesis2441563959449389152600600600600-697148072200853787278284247269066639192075167498588264571info:eu-repo/semantics/openAccessreponame:Biblioteca Digital de Teses e Dissertações da UEFSinstname:Universidade Estadual de Feira de Santana (UEFS)instacron:UEFSORIGINALAlismário Leite da Silva - Dissertação.pdfAlismário Leite da Silva - Dissertação.pdfapplication/pdf1982516http://tede2.uefs.br:8080/bitstream/tede/1600/2/Alism%C3%A1rio+Leite+da+Silva+-+Disserta%C3%A7%C3%A3o.pdf659fea43ede9399cc561b42d4a998136MD52LICENSElicense.txtlicense.txttext/plain; charset=utf-82165http://tede2.uefs.br:8080/bitstream/tede/1600/1/license.txtbd3efa91386c1718a7f26a329fdcb468MD51tede/16002023-12-18 12:45:29.797oai:tede2.uefs.br:8080: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Biblioteca Digital de Teses e Dissertaçõeshttp://tede2.uefs.br:8080/PUBhttp://tede2.uefs.br:8080/oai/requestbcuefs@uefs.br|| bcref@uefs.br||bcuefs@uefs.bropendoar:2023-12-18T15:45:29Biblioteca Digital de Teses e Dissertações da UEFS - Universidade Estadual de Feira de Santana (UEFS)false |
dc.title.por.fl_str_mv |
Óxido nítrico como agente mitigador do estresse salino em Physalis angulata l. |
title |
Óxido nítrico como agente mitigador do estresse salino em Physalis angulata l. |
spellingShingle |
Óxido nítrico como agente mitigador do estresse salino em Physalis angulata l. Silva, Alismário Leite da Sinalizador celular Atenuação do estresse salino Crescimento Trocas gasosas Cell signaling Saline stress attenuation Growth Gas exchange CIENCIAS AGRARIAS |
title_short |
Óxido nítrico como agente mitigador do estresse salino em Physalis angulata l. |
title_full |
Óxido nítrico como agente mitigador do estresse salino em Physalis angulata l. |
title_fullStr |
Óxido nítrico como agente mitigador do estresse salino em Physalis angulata l. |
title_full_unstemmed |
Óxido nítrico como agente mitigador do estresse salino em Physalis angulata l. |
title_sort |
Óxido nítrico como agente mitigador do estresse salino em Physalis angulata l. |
author |
Silva, Alismário Leite da |
author_facet |
Silva, Alismário Leite da |
author_role |
author |
dc.contributor.advisor1.fl_str_mv |
Santana, José Raniere Ferreira de |
dc.contributor.advisor1ID.fl_str_mv |
5551.554.485-49 https://orcid.org/0000-0003-0186-6888 |
dc.contributor.advisor1Lattes.fl_str_mv |
http://lattes.cnpq.br/8371650330571261 |
dc.contributor.authorID.fl_str_mv |
04539302558 |
dc.contributor.authorLattes.fl_str_mv |
http://lattes.cnpq.br/3627492836286024 |
dc.contributor.author.fl_str_mv |
Silva, Alismário Leite da |
contributor_str_mv |
Santana, José Raniere Ferreira de |
dc.subject.por.fl_str_mv |
Sinalizador celular Atenuação do estresse salino Crescimento Trocas gasosas |
topic |
Sinalizador celular Atenuação do estresse salino Crescimento Trocas gasosas Cell signaling Saline stress attenuation Growth Gas exchange CIENCIAS AGRARIAS |
dc.subject.eng.fl_str_mv |
Cell signaling Saline stress attenuation Growth Gas exchange |
dc.subject.cnpq.fl_str_mv |
CIENCIAS AGRARIAS |
description |
Saline stress can involve several actions in plant, mainly responses that induce stress tolerance, acting in a coordinated way, such as controlling water loss, osmotic adjustments, ionic homeostasis and antioxidant defense. However, for such responses, the stress perception by plant is necessary and thus, be transmitted to the protective inducing machinerythrough the action of the signaling agents. Nitric oxide (NO), due to its particular properties, is considered an important signaling molecule in face of stress conditions, playing an important role in the plants defense. Thus, the aim of this work was to evaluate the main biochemical and physiological responses of P. angulata plants under saline stress, as well as the role of the NO mitigating potential. The salt stress conditions were simulated in two experiments in a greenhouse with floating hydroponic system, containing five electrical conductivity levels of the nutrient solution - EC (EC0: 0.00; EC1: 1.80; EC2: 3.60; EC3: 5.40 and EC4: 7.2 dS m-1) in experiment I and sodium nitroprusside concentrations (SNP, 0, 25, 50, 75 and 100 μM), an exogenous NO donor, in experiment II. Water relations, gas exchange, sugars accumulation, proteins, amino acids, nitrate reductase activity in leaves and growth parameters were evaluated. Water relations (water potential and osmoprotectors) were affected mainly in plants under severe salt stress (7.2 dS m-1), as well as gas exchange, where the decrease in stomatal conductance at the highest levels of stress caused reductions in the photosynthetic rate, which consequently affected the growth of plants. It was observed that P. angulata plants adjusted osmotically, which accumulated sugars as a mechanism of acclimatization to salinity. The application of SNP mitigated the effects of salt stress on photosynthesis and nitrate reductase. Plants exposed to the stressor in the presence of SNP showed greater water potential and the damage caused by salt was reversed. NO reversed and/or attenuated the symptoms of salinity on plant growth, especially in the accumulation of dry matter and leaf area. Low concentrations of SNP are indicated to mitigate the negative effects of salt stress, promoting the improvement in photosynthetic rates, minimizing the decrease in leaf water potential and growth and pre-acclimatization with 65 μM is recommended for the cultivation of this species under saline environment. |
publishDate |
2020 |
dc.date.issued.fl_str_mv |
2020-06-15 |
dc.date.accessioned.fl_str_mv |
2023-12-18T15:45:29Z |
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.citation.fl_str_mv |
SILVA, Alismário Leite da. Óxido nítrico como agente mitigador do estresse salino em Physalis angulata l., 2020, 146 f., Dissertação (Mestrado) - Programa de Pós-Graduação em Recursos Genéticos Vegetais em Recursos Genéticos Vegetais, Universidade Estadual de Feira de Santana, Feira de Santana. |
dc.identifier.uri.fl_str_mv |
http://tede2.uefs.br:8080/handle/tede/1600 |
identifier_str_mv |
SILVA, Alismário Leite da. Óxido nítrico como agente mitigador do estresse salino em Physalis angulata l., 2020, 146 f., Dissertação (Mestrado) - Programa de Pós-Graduação em Recursos Genéticos Vegetais em Recursos Genéticos Vegetais, Universidade Estadual de Feira de Santana, Feira de Santana. |
url |
http://tede2.uefs.br:8080/handle/tede/1600 |
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por |
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por |
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openAccess |
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Universidade Estadual de Feira de Santana |
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UEFS |
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Universidade Estadual de Feira de Santana |
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