Potassium and irrigation water salinity on the formation of sour passion fruit seedlings

Lima, Geovani Soares de; Soares, Maria G. da S.; Soares, Lauriane Almeida dos Anjos; Pinheiro, Francisco Wesley Alves; Silva, Jailson B. da

doi:10.1590/1807-1929/agriambi.v25n6p393-401

Cited by 15 publications

(9 citation statements)

References 32 publications

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“…The decrease in soursop SD and VVI reflects the effect of the osmotic potential of the soil solution caused by the high concentrations of salts, which hinders the absorption of water and nutrients by plants and, consequently, causes loss of turgor pressure in the cells, which compromises plant growth (Lima et al, 2021).…”

Section: Resultsmentioning

confidence: 99%

Hydrogen peroxide in attenuation of salt stress effects on physiological indicators and growth of soursop

et al. 2024

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To mitigate the deleterious effects of salt stress, substances capable of acting as mitigators and/or inducers of tolerance to stress have been used, enabling the use of saline waters and contributing to the development of irrigated agriculture. In this context, the aim of the present study was to evaluate the effect of foliar spraying with hydrogen peroxide as an attenuator of salt stress effects on soursop morphophysiology. The experiment was conducted under greenhouse conditions in Campina Grande - PB, Brazil, using a randomized block design, in a 4 × 4 factorial arrangement, whose treatments resulted from the combination of four levels of electrical conductivity of irrigation water - ECw (0.8 – control, 1.6, 2.4, and 3.2 dS m-1) and four concentrations of hydrogen peroxide - H2O2 (0, 10, 20, and 30 μM), with three replicates. Foliar application of hydrogen peroxide at a concentration of 10 µM increased growth, chlorophyll synthesis, and relative water content in the leaves and consequently reduced the foliar water saturation deficit of soursop irrigated with ECw up to 1.6 dS m-1. The concentration of hydrogen peroxide of 30 µM intensified the salt stress on the electrolyte leakage in the leaf blade and the photosynthetic pigments of soursop, 270 days after transplanting.

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Section: Resultsmentioning

confidence: 99%

Hydrogen peroxide in attenuation of salt stress effects on physiological indicators and growth of soursop

et al. 2024

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“…The reduction in RDB is a reflection of lower root growth with increased salinity. This is a plant tolerance mechanism to reduce the absorption of water with salts and mitigate toxicity (Lima et al, 2021). Putti et al (2018) evaluated the cultivation of zucchini under salt stress conditions (ECw from 0 to 5 dS m -1 ) and found a reduction of 1.64 g in the dry biomass of the zucchini root with each unit increment of ECw, at 30 DAT.…”

Section: Tablementioning

confidence: 99%

Hydrogen peroxide and saline nutrient solution in hydroponic zucchini culture

Dantas

Lima

Gheyi

et al. 2022

Semina: Ciênc. Agrár.

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Saline water has been used in irrigation due to the limited availability of fresh water, especially in arid and semi-arid regions. However, the use of this type of water can affect crop growth and development. Studies have tested the use of chemical conditioners to minimize the negative effects of salinity on plants. In this scenario, the present study examined the role of hydrogen peroxide in mitigating the negative effects of salt stress on zucchini plants grown in a hydroponic system. The study was carried out in a greenhouse in Pombal - PB, Brazil. The NFT (nutrient film technique) hydroponic system was employed. A randomized complete experimental design was set up with a 4 × 4 factorial arrangement consisting of four levels of electrical conductivity in the nutrient solution (ECns: 2.1 [control], 3.6, 5.1, and 6.6 dS m-1) and four concentrations of hydrogen peroxide (H2O2: 0, 20, 40, and 60 μM), in three replicates. Foliar spraying with H2O2 at 60 and 40 μM associated with the nutrient solution of 2.1 dS m-1 increased stem diameter and root length, respectively, at 47 days after transplanting. However, at ECns higher than 2.1 dS m-1, the application of H2O2 at the concentrations of 60 and 40 μM intensified salt stress, reducing stem diameter and root length. Nutrient solution salinity levels above 2.1 dS m-1 reduce photosynthetic pigments; the number of leaves; leaf area; the length of the main branch; and the dry biomass of stems, leaves, and roots of zucchini plants. Chlorophyll b and carotenoid contents are the variables most sensitive to changes in salinity levels.

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“…Although several studies address the effects of salt stress on passion fruit (Lima et al, 2021;Sá et al, 2021;Silva et al, 2021), the tolerance of this crop to salinity varies according to crop development stage (Soares et al, 2021). In this context, the objective of this study was to determine the quantum yield, chlorophyll levels, and cell damage in yellow passion fruit cultivated under different irrigation strategies with brackish water and potassium fertilization in the second year of its cultivation.…”

Section: Introductionmentioning

confidence: 99%

Quantum yield, chlorophyll, and cell damage in yellow passion fruit under irrigation strategies with brackish water and potassium

et al. 2022

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The occurrence of water sources with high concentrations of salts in the semiarid region of Northeast Brazil stands out as a limiting factor in the cultivation of irrigated yellow passion fruit. Thus the search for irrigation strategies with brackish water is fundamental for the sustainability of irrigated crops. The objective of the present study was to determine the quantum yield, chlorophyll levels, and cell damage in yellow passion fruit cultivated under different irrigation strategies with brackish water and potassium fertilization. The experiment was conducted under field conditions in São Domingos -PB, Brazil, adopting a randomized block design in a 6×2 factorial scheme, consisting of six strategies of use of brackish water applied in the different phenological stages of crop and two doses of potassium (60 and 100% of the recommendation), with four replicates. Two levels of irrigation water salinity were used, with low (1.3 dS m -1 ) and high electrical conductivity (4.0 dS m -1 ). The potassium dose of 100% recommendation corresponds to the application of 345 g of K 2 O per plant per year. The use of brackish water (4.0 dS m -1 ) increased chlorophyll fluorescence and negatively affected the photosynthetic pigments of yellow passion fruit, regardless of the phenological stage. Salt stress intensified intercellular electrolyte leakage in passion fruit plants under higher dose of potassium. Our results show that fertilization equivalent to 100% of the potassium recommendation is excessive for yellow passion fruit 'BRS GA1' in the tropical semiarid region under salt stress conditions.

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Potassium and irrigation water salinity on the formation of sour passion fruit seedlings

Cited by 15 publications

References 32 publications

Hydrogen peroxide in attenuation of salt stress effects on physiological indicators and growth of soursop

Hydrogen peroxide in attenuation of salt stress effects on physiological indicators and growth of soursop

Hydrogen peroxide and saline nutrient solution in hydroponic zucchini culture

Quantum yield, chlorophyll, and cell damage in yellow passion fruit under irrigation strategies with brackish water and potassium

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