Physiological changes of pomegranate seedlings under salt stress and nitrogen fertilization

Soares, Lauriane Almeida dos Anjos; Oliveira, Sabrina Gomes de; Lima, Geovani Soares de; Fernandes, Pedro Dantas; Araújo, Railene Hérica Carlos Rocha; Fernandes, Eliene Araújo

doi:10.1590/1807-1929/agriambi.v25n7p453-459

Cited by 10 publications

(3 citation statements)

References 22 publications

(26 reference statements)

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“…The decrease in chlorophyll content has been considered a typical symptom of oxidative stress and can be attributed to the inhibition of synthesis or degradation by the chlorophyllase enzyme (SOARES et al, 2021). In addition, the reduction may occur due to slow synthesis or rapid degradation, being an indication that there was a photoprotection mechanism through the reduction of light absorbance, decreasing chlorophyll contents (TAÏBI et al, 2016).…”

Section: Discussionmentioning

confidence: 99%

Potassium fertilization as salt stress attenuator in sour passion fruit

et al. 2023

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Water scarcity associated with irregular rainfall in the semi-arid region of Northeastern Brazil stands out as a limiting factor for agricultural production. Thus, the use of waters with high concentration of salts is an alternative to expand irrigated agriculture in this region. In this context, this study evaluated the water status, intercellular electrolyte leakage, photosynthetic pigments, and gas exchange of ‘BRS SC1’ sour passion fruit as a function of irrigation with water of different levels of salinity and potassium doses. The experiment was carried out in pots adapted as drainage lysimeters under field conditions at the Experimental Farm of the Federal University of Campina Grande in São Domingos - PB, Brazil. The experimental design was randomized blocks, in a 5 × 4 factorial scheme, whose treatments were obtained by combining two factors: five levels of electrical conductivity of irrigation water - ECw (0.3, 1.1, 1.9, 2.7, and 3.5 dS m-1), associated with four potassium doses (60, 80, 100, and 120% of the recommendation), with three replicates. Water with electrical conductivity greater than 0.3 dS m-1 reduced the relative water content, chlorophyll a and chlorophyll b contents, CO2 assimilation rate, and instantaneous water use efficiency of ‘BRS SC1’ sour passion fruit plants. The estimated potassium dose of 85% of the recommendation (equivalent to 293 g per plant per year) mitigated the deleterious effects of salt stress on stomatal conductance, transpiration, internal CO2 concentration, and instantaneous carboxylation efficiency of passion fruit ‘BRS SC1’.

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Section: Discussionmentioning

confidence: 99%

Potassium fertilization as salt stress attenuator in sour passion fruit

et al. 2023

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“…The reduction in CO 2 assimilation rate in plants grown under ECns of 5.4 dS m -1 occurred due to stomatal closure under salt stress, as a strategy to reduce the flow of water vapor and CO 2 diffusion in the cells of the leaf mesophyll, compromising transpiration and CO 2 assimilation rate (Altuntas et al, 2018;Dias et al, 2019). Soares et al (2021) also found that an increase in electrical conductivity negatively affected the CO 2 assimilation rate of pomegranate seedlings, with a reduction of 21.04% between salinity levels of 0.3 and 6.3 dS m -1 . However, the positive effect of the application of 1.3 mM salicylic acid on plants grown under the lowest level of ECns may be related to the capacity of salicylic acid to improve enzymatic and photosynthetic activities, maintaining the balance between the production and elimination of reactive oxygen species (Batista et al, 2019).…”

Section: Source Of Variation Dfmentioning

confidence: 99%

Salicylic acid does not mitigate salt stress on the morphophysiology and production of hydroponic melon

et al. 2022

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The excess of salts present in the water can limit the hydroponic cultivation of melon in semi-arid regions of the Brazilian Northeast, making it necessary to use strategies that allow the use of these waters. Among these strategies, the use of elicitor substances stands out, such as salicylic acid. In this context, this study aimed to evaluate the effect of foliar application of salicylic acid in mitigating the harmful effects of salt stress on the morphophysiology and production of 'Gaúcho' melon cultivated in a hydroponic system. A completely randomized design was adopted in a split-plot scheme, with four levels of electrical conductivity of the nutrient solution - ECsn (2.1, 3.2, 4.3, and 5.4 dS m-1) considered the plots and four salicylic acid concentrations - SA (0, 1.5, 3.0, and 4.5 mM), the subplots, with six replications. The foliar application of salicylic acid concentrations did not mitigate the deleterious effects of salt stress on the morphophysiology and yield of melon grown in hydroponic system. The concentration of 4.5 mM of salicylic acid intensified the harmful effects of the salinity of the nutrient solution on gas exchange and fresh weight of hydroponic melon.

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“…An alternative that can minimize the effects of salt stress on cherry tomato is nitrogen fertilization (VIEIRA et al, 2016). Several studies have been conducted to assess the mitigating effect of nitrogen on plants subjected to salt stress (DIAS et al, 2020;PINHEIRO et al, 2020;SÁ et al, 2020;SILVA et al, 2020;SOARES et al, 2021). This fact is due to the role of nitrogen in plants, being part of several organic compounds, such as amino acids, proteins, chlorophyll, among others, which assist in osmotic adjustment and thus favor greater absorption of water and nutrients, and positively acting on ionic homeostasis (COSTA et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Biomass, Gas Exchange and Production of Cherry Tomato Cultivated Under Saline Water and Nitrogen Fertilization

et al. 2022

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Cherry tomato cultivation in the semi-arid region of northeastern Brazil is limited by water scarcity, so it is common to use water sources with high concentrations of salts in this region, which have a deleterious effect on plants, which can be alleviated through management strategies, and fertilization with nitrogen stands out. This study aimed to evaluate the growth, gas exchange and production of cherry tomato under irrigation with saline water and nitrogen fertilization. The experiment was carried out in a screened environment at the CCTA/UFCG in Pombal - PB from October 2020 to February 2021, using a randomized block design, in a 5 × 5 factorial scheme, with five levels of electrical conductivities of water - ECw (0.3; 1.3; 2.3; 3.3 and 4.3 dS m−1) and five nitrogen doses - ND (50; 75; 100; 125 and 150% of the recommended dose for the crop), with three replicates. Irrigation water salinity from 0.3 dS m−1 reduced stomatal conductance, transpiration, CO2 assimilation rate and production components of cherry tomato. Nitrogen fertilization from 50% of the recommendation reduced stomatal conductance, transpiration and CO2 assimilation rate of cherry tomato. Irrigation with water of electrical conductivity from 0.3 dS m−1 associated with nitrogen dose of 150% of the recommendation intensified the effect of salt stress on dry biomass accumulation in cherry tomato.

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Physiological changes of pomegranate seedlings under salt stress and nitrogen fertilization

Cited by 10 publications

References 22 publications

Potassium fertilization as salt stress attenuator in sour passion fruit

Potassium fertilization as salt stress attenuator in sour passion fruit

Salicylic acid does not mitigate salt stress on the morphophysiology and production of hydroponic melon

Biomass, Gas Exchange and Production of Cherry Tomato Cultivated Under Saline Water and Nitrogen Fertilization

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