Potassium nitrate priming mitigates salt stress on wheat seedlings

Detalhes bibliográficos
Autor(a) principal: Steiner, Fábio
Data de Publicação: 2019
Outros Autores: Zuffo, Alan M., Oliveira, Carlos E. da Silva, Honda, Guilherme B., Machado, Juan S.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: https://doi.org/10.19084/RCA16135
Resumo: Seeds of wheat (Triticum aestivum L., cv. Jadeíde 11) were used to investigate the effects of potassium nitrate priming on germination and early seedling growth under salt stress. It was hypothesized that priming with potassium nitrate may improve seed germination and plant establishment by mitigating the negative effects of saline stress through its role in cell osmotic balance. The seeds were soaked in distilled water or in a 10 g L–1 KNO3solution at 25 °C for 2 hours, and after drying, were distributed in plastic boxes with blotter paper containing different salt solutions prepared with concentrations of 0 (control), 25, 50, 75 and 100 mmol L–1 NaCl. The plastic boxes were kept in a seed germinator, at 22 °C for 12 days. A completely randomized design in a 2 × 5 factorial scheme with four replications of 50 seeds each was used. The primed seeds with KNO3 showed improved germination performance, early growth and vigor index of wheat seedlings in salt stress conditions. Low salt concentrations may induce osmotic adjustment activity in the wheat plants and lead to increases in shoot and root length of wheat seedlings, whereas higher concentrations cause severe inhibition of plant growth. The ‶Jadeíde 11″ wheat cultivar is a moderately tolerant genotype to salt stress during the seedling establishment stage by presenting yield stability index greater than 0.74 until the level of 100 mmol L–1 of NaCl, and therefore can be recommended for cropping in soils with high salinity levels.
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spelling Potassium nitrate priming mitigates salt stress on wheat seedlingsNitrato de potássio ameniza o estresse salino em plântulas de trigoGeralSeeds of wheat (Triticum aestivum L., cv. Jadeíde 11) were used to investigate the effects of potassium nitrate priming on germination and early seedling growth under salt stress. It was hypothesized that priming with potassium nitrate may improve seed germination and plant establishment by mitigating the negative effects of saline stress through its role in cell osmotic balance. The seeds were soaked in distilled water or in a 10 g L–1 KNO3solution at 25 °C for 2 hours, and after drying, were distributed in plastic boxes with blotter paper containing different salt solutions prepared with concentrations of 0 (control), 25, 50, 75 and 100 mmol L–1 NaCl. The plastic boxes were kept in a seed germinator, at 22 °C for 12 days. A completely randomized design in a 2 × 5 factorial scheme with four replications of 50 seeds each was used. The primed seeds with KNO3 showed improved germination performance, early growth and vigor index of wheat seedlings in salt stress conditions. Low salt concentrations may induce osmotic adjustment activity in the wheat plants and lead to increases in shoot and root length of wheat seedlings, whereas higher concentrations cause severe inhibition of plant growth. The ‶Jadeíde 11″ wheat cultivar is a moderately tolerant genotype to salt stress during the seedling establishment stage by presenting yield stability index greater than 0.74 until the level of 100 mmol L–1 of NaCl, and therefore can be recommended for cropping in soils with high salinity levels.Sementes de trigo (Triticum aestivum L., cv. Jadeíde 11) foram utilizados para investigar os efeitos do condicionamento osmótico com nitrato de potássio na germinação e no crescimento inicial das plântulas sob estresse salino. Supõe-se que o condicionamento com nitrato de potássio pode melhorar a germinação das sementes e o estabelecimento das plantas por amenizar os efeitos negativos do estresse salino através do seu papel no equilíbrio osmótico das células. As sementes foram embebidas em água destilada ou em solução contendo 10 g L–1 de KNO3 à 25 °C durante 2 horas e, após secagem, foram distribuídas em caixas plásticas com papel mata-borrão contendo diferentes soluções salinas preparadas com concentrações de 0 (controle), 25, 50, 75 e 100 mmol L–1 de NaCl. As caixas plásticas com as sementes foram mantidas em germinador, à 22 °C durante 12 dias. Foi utilizado o delineamento experimental inteiramente casualizado, em esquema fatorial 2 x 5, com quatro repetições de 50 sementes. Sementes de trigo condicionadas com nitrato de potássio possuem maior taxa de germinação, crescimento inicial e índice de vigor de plântulas quando submetidas em condições de estresse salino. Níveis baixos de salinidade podem induzir o ajustamento osmótico nas plântulas de trigo e resultar em maior comprimento da parte aérea e das raízes, enquanto que altos níveis de salinidade causam severa inibição do crescimento das plantas. O cultivar de trigo "Jadeíde 11" é um genótipo moderadamente tolerante ao estresse salino durante a fase de estabelecimento das plântulas, apresentando índice de estabilidade de rendimento superior a 0,74 até o nível de 100 mmol L-1 de NaCl e, portanto, pode ser recomendado para o cultivo em áreas com altos níveis de salinidade do solo.Sociedade de Ciências Agrárias de Portugal2019-01-20T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttps://doi.org/10.19084/RCA16135eng2183-041X0871-018XSteiner, FábioZuffo, Alan M.Oliveira, Carlos E. da SilvaHonda, Guilherme B.Machado, Juan S.info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2022-09-06T09:24:53Zoai:ojs.revistas.rcaap.pt:article/16773Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T15:31:05.132508Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Potassium nitrate priming mitigates salt stress on wheat seedlings
Nitrato de potássio ameniza o estresse salino em plântulas de trigo
title Potassium nitrate priming mitigates salt stress on wheat seedlings
spellingShingle Potassium nitrate priming mitigates salt stress on wheat seedlings
Steiner, Fábio
Geral
title_short Potassium nitrate priming mitigates salt stress on wheat seedlings
title_full Potassium nitrate priming mitigates salt stress on wheat seedlings
title_fullStr Potassium nitrate priming mitigates salt stress on wheat seedlings
title_full_unstemmed Potassium nitrate priming mitigates salt stress on wheat seedlings
title_sort Potassium nitrate priming mitigates salt stress on wheat seedlings
author Steiner, Fábio
author_facet Steiner, Fábio
Zuffo, Alan M.
Oliveira, Carlos E. da Silva
Honda, Guilherme B.
Machado, Juan S.
author_role author
author2 Zuffo, Alan M.
Oliveira, Carlos E. da Silva
Honda, Guilherme B.
Machado, Juan S.
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Steiner, Fábio
Zuffo, Alan M.
Oliveira, Carlos E. da Silva
Honda, Guilherme B.
Machado, Juan S.
dc.subject.por.fl_str_mv Geral
topic Geral
description Seeds of wheat (Triticum aestivum L., cv. Jadeíde 11) were used to investigate the effects of potassium nitrate priming on germination and early seedling growth under salt stress. It was hypothesized that priming with potassium nitrate may improve seed germination and plant establishment by mitigating the negative effects of saline stress through its role in cell osmotic balance. The seeds were soaked in distilled water or in a 10 g L–1 KNO3solution at 25 °C for 2 hours, and after drying, were distributed in plastic boxes with blotter paper containing different salt solutions prepared with concentrations of 0 (control), 25, 50, 75 and 100 mmol L–1 NaCl. The plastic boxes were kept in a seed germinator, at 22 °C for 12 days. A completely randomized design in a 2 × 5 factorial scheme with four replications of 50 seeds each was used. The primed seeds with KNO3 showed improved germination performance, early growth and vigor index of wheat seedlings in salt stress conditions. Low salt concentrations may induce osmotic adjustment activity in the wheat plants and lead to increases in shoot and root length of wheat seedlings, whereas higher concentrations cause severe inhibition of plant growth. The ‶Jadeíde 11″ wheat cultivar is a moderately tolerant genotype to salt stress during the seedling establishment stage by presenting yield stability index greater than 0.74 until the level of 100 mmol L–1 of NaCl, and therefore can be recommended for cropping in soils with high salinity levels.
publishDate 2019
dc.date.none.fl_str_mv 2019-01-20T00:00:00Z
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dc.identifier.uri.fl_str_mv https://doi.org/10.19084/RCA16135
url https://doi.org/10.19084/RCA16135
dc.language.iso.fl_str_mv eng
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dc.publisher.none.fl_str_mv Sociedade de Ciências Agrárias de Portugal
publisher.none.fl_str_mv Sociedade de Ciências Agrárias de Portugal
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