Exogenous application of organic acids in maize seedlings under salt stress

Pereira, Kleane Targino Oliveira; Sá, F.V.S.; Torres, Salvador Barros; Paiva, Emanoela Pereira de; Alves, Tatianne Raianne Costa; Oliveira, Roseane Rodrigues de

doi:10.1590/1519-6984.250727

Cited by 3 publications

(2 citation statements)

References 8 publications

(17 reference statements)

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“…With the application of SA, the reduction in total dry mass was lower, by observing a quadratic effect with an increase of up to 1.0 mM in ECw (0.5 to 2.5 dS m -1 ) and 0.5 mM in the electrical conductivities of water above 2.5 dS m -1 . Salicylic acid improved Root/Shoot in plants, balancing the distribution of reserves for growth (Pereira et al, 2021). Similar results were also found by Jan et al (2016) when evaluating eggplant seedlings under saline stress using ascorbic acid.…”

Section: Resultssupporting

confidence: 86%

Exogenous application of salicylic acid induces salinity tolerance in eggplant seedlings

et al. 2024

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Under salt stress conditions, plant growth is reduced due to osmotic, nutritional and oxidative imbalance. However, salicylic acid acts in the mitigation of this abiotic stress by promoting an increase in growth, photosynthesis, nitrogen metabolism, synthesis of osmoregulators and antioxidant enzymes. In this context, the objective was to evaluate the effect of salicylic acid doses on the growth and physiological changes of eggplant seedlings under salt stress. The experiment was conducted in a greenhouse, where the treatments were distributed in randomized blocks using a central composite matrix Box with five levels of electrical conductivity of irrigation water (CEw) (0.50; 1.08; 2.50; 3.92 and 4.50 dS m-1), associated with five doses of salicylic acid (SA) (0.00; 0.22; 0.75; 1.28 and 1.50 mM), with four repetitions and each plot composed of three plants. At 40 days after sowing, plant height, stem diameter, number of leaves, leaf area, electrolyte leakage, relative water content, and total dry mass were determined. ECw and SA application influenced the growth and physiological changes of eggplant seedlings. Increasing the ECw reduced growth in the absence of SA. Membrane damage with the use of SA remained stable up to 3.9 dS m-1 of ECw. The relative water content independent of the CEw increased with 1.0 mM of SA. The use of SA at the concentration of 1.0 mM mitigated the deleterious effect of salinity on seedling growth up to 2.50 dS m-1 of ECw.

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Section: Resultssupporting

confidence: 86%

Exogenous application of salicylic acid induces salinity tolerance in eggplant seedlings

et al. 2024

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“…A condutividade elétrica está relacionada ao teor de concentração de sais solúveis ou salinidade que indica a presença de substâncias dissolvidas que se dissociam em ânions e cátions, sendo, por consequência, diretamente proporcional à concentração iônica (LACERDA et al, 2016). A salinidade é preocupante na agricultura irrigada pois pode afetar no crescimento das plantas e provocar estresse hídrico, portanto é um dos fatores importantes para determinar a adequação do efluente para a irrigação (PEREIRA et al, 2024).…”

Section: Condutividade Elétrica (Ce)unclassified

Potencial de reúso de efluentes tratados para irrigação na agricultura periurbana no Semiárido Paraibano.

Bernardino¹

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A água é um recurso finito que se encontra escasso, o que justifica a busca por gestão e inovação de práticas que a preserve. O objetivo da pesquisa é quantificar o potencial de reúso de efluentes tratados pelas ETEs da CAGEPA para irrigação na agricultura periurbana no Semiárido Paraibano. Foram levantados dados das 17 Estações de Tratamento de Esgotos (ETE), localizadas no Semiárido Paraibano, e operadas pela Companhia de Água e Esgotos do Estado da Paraíba (CAGEPA), durante o período de janeiro a dezembro de 2019. Foram analisados os seguintes parâmetros físico-químicos e bacteriológicos: Potencial Hidrogeniônico (pH), Condutividade Elétrica (CE), Demanda Bioquímica de Oxigênio (DBO), Demanda Química de Oxigênio (DQO), Sólidos Totais (ST), Oxigênio Dissolvido (OD), Nitrogênio Amoniacal, Fósforo Total, e Coliformes Termotolerantes. Os dados foram submetidos à análise descritiva e expresso em valores mínimos, máximos e médios. O potencial de reúso foi avaliado com base na qualidade dos efluentes tratados para uma irrigação agrícola conforme as recomendações estabelecidas pelo Programa de Pesquisas em Saneamento Básico - PROSAB. Os indicadores variaram em cada ETE em função do mês de coleta, onde foi possível identificar efluentes com qualidade para irrigação irrestrita, embora a maioria apresentou qualidade para irrigação restrita, com a necessidade de tratamento complementar em alguns meses para determinados cultivos, por exemplo, para as culturas de tomate e hortaliças. Quanto ao volume de efluentes tratados gerados nas ETEs, há potencial de reúso na irrigação periurbana no Semiárido Paraibano, sobretudo considerando lavouras permanentes onde os efluentes tratados podem beneficiar uma área de 2.387,83 ha para uma demanda de irrigação de 12.000 m³ ha-1 ano-1, o que demonstra ser um recurso sustentável e que precisa ser regulamentado no Brasil.

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Discontinuous Hydration Cycles with Elicitors Improve Germination, Growth, Osmoprotectant, and Salt Stress Tolerance in Zea mays L.

et al. 2023

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Saline stress impairs germination and initial plant growth. However, discontinuous hydration cycles induce osmotic tolerance in seeds and can improve the response of maize seeds to saline stress. The objective of this study was to evaluate the action of discontinuous hydration cycles with different salt stress tolerance elicitors on germination, growth, and osmotic adjustment of maize cultivars. Maize seeds of BR 206 and BRS 5037 Cruzeta cultivars were subjected to the following treatments: 0.0 mmol of NaCl (control), 250 mmol of NaCl (salt stress), salt stress + three discontinuous hydration cycles (DHCs) of seeds in water, salt stress + DHCs with gibberellic acid, salt stress + DHCs with hydrogen peroxide, salt stress + DHCs with salicylic acid, and salt stress + DHCs with ascorbic acid. Salt stress reduced the germination, growth, and biomass accumulation in maize seedlings—the BR 206 cultivar outperformed BRS 5037 Cruzeta. Discontinuous hydration cycles with water failed to improve the salt stress tolerance of maize seeds. However, discontinuous hydration cycles with gibberellic acid, hydrogen peroxide, and salicylic acid promoted salt stress tolerance in maize due to increased synthesis of osmoprotectants. Our results revealed salicylic acid is appropriate for discontinuous hydration cycles in maize seeds.

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Exogenous application of organic acids in maize seedlings under salt stress

Cited by 3 publications

References 8 publications

Exogenous application of salicylic acid induces salinity tolerance in eggplant seedlings

Exogenous application of salicylic acid induces salinity tolerance in eggplant seedlings

Potencial de reúso de efluentes tratados para irrigação na agricultura periurbana no Semiárido Paraibano.

Discontinuous Hydration Cycles with Elicitors Improve Germination, Growth, Osmoprotectant, and Salt Stress Tolerance in Zea mays L.

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