Efeito de liberadores de óxido nítrico na qualidade fisiológica de sementes de repolho sob salinidade

Kaiser, Ingrid Schimidt; Machado, Lorena Contarini; Lopes, José Carlos; Mengarda, Liana Hilda Golin

doi:10.1590/0034-737x201663010006

Cited by 12 publications

(20 citation statements)

References 13 publications

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“…The impact of salinity is considered a limiting factor in agricultural production in the arid and semi-arid regions of the world. In order to reduce the negative impacts on agriculture, alternatives are sought for the reutilization of unused areas, such as agricultural varieties tolerant to these conditions, as well as the prospection of substances capable of reversing the damage caused by salinity during cultivation (Kaiser et al, 2016 ).…”

Section: Introductionmentioning

confidence: 99%

Morphophysiology of peppermint irrigated with salt water and bovine biofertilizer

Véras¹,

Filho²,

Silva³

et al. 2017

Afr. J. Biotechnol.

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Peppermint is a medicinal plant grown worldwide, but it has not been extensively studied, especially the use of saline water for its cultivation. In this sense, the objective of this study is to evaluate the effect of saline waters on peppermint cultivation under the application of bovine biofertilizer. The experiment was carried out from September 2015 to December 2015 in a greenhouse of the Center of Human and Agrarian Sciences of the State University of Paraíba (UEPB) in the municipality of Catolé do Rocha-PB, Brazil. The experimental design was completely randomized, in a factorial scheme of 5 × 2, with 8 replicates. The treatments consisted of electric conductivity combined with irrigation water (ECw) of 1.0, 2.0, 3.0, 4.0, and 5.0 dS m-1 in the presence and absence of bovine biofertilizer. The increase in electrical conductivity of the irrigation water levels from 1 dS m-1 reduced the growth, development and production of peppermint biomass. Peppermint plants that received bovine biofertilizer had superior results in growth and biomass production. The application of bovine biofertilizer attenuates the effects of salty peppermint. The growth and production of peppermint biomass increased when the plants are irrigated with low salinity water (1 dS m-1) using bovine biofertilizer.

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Section: Introductionmentioning

confidence: 99%

Morphophysiology of peppermint irrigated with salt water and bovine biofertilizer

Véras¹,

Filho²,

Silva³

et al. 2017

Afr. J. Biotechnol.

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“…Potassium nitrate has been studied in various agricultural crops to understand its mechanisms of action in species such as melon (ANDRADE JÚNIOR et al, 2011), "pau-d"dalho" (LOPES et al, 2015), and cabbage (KAISER et al, 2016), cultivated under saline conditions. However, studies related to potassium nitrate and water deficiency in cowpea remain scarce.…”

Section: Introductionmentioning

confidence: 99%

Genotypic Variation on the Antioxidative Response of Cowpeacultivars Exposed to Osmotic Stress

et al. 2017

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-The cowpea [Vigna unguiculata (L.) Walp.], also known as cowpea, is of fundamental socioeconomic importance to the northeast of Brazil, and has become one of the main sources of protein in the diet of the rural population. However, in this region, it has become necessary to identify genotypes that are better adapted to drought. In addition, research is needed regarding the action of substances that promote tolerance to stress factors. The aim of this study was to evaluate the antioxidative response of cowpea cultivars under osmotic stress conditions using potassium nitrate as an attenuator. Five osmotic potentials were tested in the substrate (0.0, −0.2, −0.4, −0.6, and −0.8 MPa), and three seed treatments (pre-soaking in distilled water, pre-soaking in potassium nitrate, and without pre-soaking) were tested in three cowpea cultivars (BRS Itaim, BRS Aracê, and BRS Potengi). The design was randomized with 45 treatments and four replications. The data were submitted to analysis of variance (P < 0.05), and in cases of significance, regression analysis was conducted to quantitate the factors. Our results indicate that an increase in proline content in cowpea plants may be seen as indicative of the intensity of water stress on germination and the initial stages of growth of the plant. The BRS Itaim cultivar best tolerates drought conditions with the application of potassium nitrate, given the increased activity of antioxidant enzymes such as superoxide dismutase, catalase, and ascorbate peroxidase.Keywords: Vigna unguiculata. Enzymes. Catalase. Hydrical stress. VARIAÇÃO GENOTÍPICA NA RESPOSTA ANTIOXIDATIVA DE CULTIVARES DE FEIJÃO-CAUPI EXPOSTOS AO ESTRESSE OSMÓTICORESUMO -O feijão-caupi [Vigna unguiculata (L.) Walp.], também conhecido como feijão macassar, representa fundamental importância socioeconômica para o Nordeste do Brasil, constituindo-se como uma das principais fontes proteicas na alimentação da população rural. Todavia, nessa região é necessário identificar genótipos mais adaptados ao déficit hídrico, bem como conhecer a ação de substâncias promotoras de tolerância a fatores de estresse. O objetivo desse trabalho foi avaliar a resposta antioxidativa de cultivares feijão-caupi sob condições de estresse osmótico, utilizando como atenuador o nitrato de potássio. Foram testados cinco potenciais osmóticos no substrato (0,0; -0,2; -0,4; -0,6 e -0,8 MPa) e três tratamentos de sementes (pré-embebição em água destilada; pré-embebição em nitrato de potássio e sem pré-embebição) em três cultivares (BRS Itaim, BRS Aracê e BRS Potengi). Foi adotado o delineamento inteiramente casualizado, com quatro repetições e sementes por repetição. Os dados obtidos foram submetidos à análise de variância (P<0,05) e nos casos de significância foi realizada a análise de regressão para fator de natureza quantitativa. Os resultados indicam que um aumento no teor de prolina em feijão-caupi pode ser visto como indicativo da intensidade do estresse hídrico na germinação e nos estágios iniciais de crescimento da planta. A cultiv...

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“…SNP is a chemical compound with the formula Na 2 [Fe(CN) 5 NO]•2H 2 O, which serves as a source of nitric oxide (NO). The application of NO donors exercises a protective role in seeds and makes them germinate in greater quantity and at greater speed (Ataíde et al, 2015;Kaiser et al, 2016;Pires et al, 2016). Just as SNP, potassium nitrate (KNO 3 ) is an NO donor, which for other species, such as Leucaena leucocephala, has a protective effect by counteracting salt stress and priming seeds under low osmotic potential, helping to maintain the physiological quality of that species .…”

Section: Resultsmentioning

confidence: 99%

“…NO is also able to reduce the effects of seed aging (Pereira et al, 2010) and increase tolerance to various abiotic stresses, such as water stress, salt stress, and stress from heavy metals (Silva et al, 2015;Kaiser et al, 2016;Pires et al, 2016). Oxidative stress, brought about by increase in concentration of superoxide, hydrogen peroxide, and alkyl peroxides, can be combatted by NO, since it has antioxidant properties (Silva et al, 2015;Pires et al, 2016).…”

Section: Resultsmentioning

confidence: 99%

Does nitric oxide protect Eucalyptus urophylla seeds under salt stress conditions?

et al. 2020

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The germination response of seeds under artificial stress conditions is a tool for better understanding of the survival and adaptation ability of species under natural stress conditions. The aims of this study were to evaluate the protective effect of nitric oxide during germination as well as seed vigor and seedling development of Eucalyptus urophylla under salt stress conditions. The experimental design was completely randomized, with five replications, in a 3 × 3 + 1 factorial arrangement, with three priming factors [water, sodium nitroprusside (SNP), and potassium nitrate (KNO3)], three germination conditions (distilled water, and the water potentials of -0.6 and -1.2 MPa), and an additional control treatment (unprimed seeds). The following determinations were made: germination count at seven and fourteen days, germination speed index, primary root length, shoot length, and total length. SNP protects seeds, leading to a higher percentage of germination, as well as greater root growth and total seedling size, whereas KNO3 is not effective in protecting seeds that suffer from salt stress, which affects their physiological and morphological characteristics. E. urophylla seeds are sensitive to salt stress, and physiological priming with SNP leads to an increase in the percentage of germination, vigor, and seedling development under salinity conditions.

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Efeito de liberadores de óxido nítrico na qualidade fisiológica de sementes de repolho sob salinidade

Cited by 12 publications

References 13 publications

Morphophysiology of peppermint irrigated with salt water and bovine biofertilizer

Morphophysiology of peppermint irrigated with salt water and bovine biofertilizer

Genotypic Variation on the Antioxidative Response of Cowpeacultivars Exposed to Osmotic Stress

Does nitric oxide protect Eucalyptus urophylla seeds under salt stress conditions?

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