Physiological indices of sour passion fruit under brackish water irrigation strategies and potassium fertilization

Lima, Geovani Soares de; Pinheiro, Francisco Wesley Alves; Souza, Weslley B. B. de; Soares, Lauriane Almeida dos Anjos; Nobre, Reginaldo Gomes; Queiroga, Roberto Cleiton Fernandes de; Fernandes, Pedro Dantas

doi:10.1590/1807-1929/agriambi.v27n5p383-392

Cited by 4 publications

(3 citation statements)

References 26 publications

(23 reference statements)

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“…In addition, the reduction in leaf turgor, as observed in this study ( Figure 1 A and Figure 9 A), induces stomatal closure, as a defense mechanism of the plant against the loss of water by transpiration, affecting physiological processes, such as stomatal conductance, internal CO 2 concentration and CO 2 assimilation rate [ 48 ]. Reductions in gas exchange in sour passion fruit plants caused by irrigation with saline water have also been reported in other studies, such as [ 5 , 13 , 16 , 30 ].…”

Section: Discussionsupporting

confidence: 73%

“…Due to the physical-chemical quality and acceptance by consumers, its fruits are used for fresh consumption and/or through agro-industrial processing in the preparation of carbonated and mixed drinks, syrups, jellies, dairy products, ice cream and canned foods [ 29 , 30 ]. It should be noted that passion fruit is considered a salt-sensitive crop [ 31 ], with an irrigation water salinity threshold of 1.3 dS m −1 [ 32 , 33 ].…”

Section: Introductionmentioning

confidence: 99%

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Foliar Applications of Salicylic Acid on Boosting Salt Stress Tolerance in Sour Passion Fruit in Two Cropping Cycles

Sobrinho

Silva

Lima

et al. 2023

Plants

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Brazil stands out as the largest producer of sour passion fruit; however, the water available for irrigation is mostly saline, which can limit its cultivation. This study was carried out with the objective of evaluating the effects of salicylic acid in the induction of tolerance in sour passion fruit to salt stress. The assay was conducted in a protected environment, using a completely randomized design in a split-plot scheme, with the levels of electrical conductivity of the irrigation water (0.8, 1.6, 2.4, 3.2, and 4.0 dS m−1) considering the plots and concentrations of salicylic acid (0, 1.2, 2.4, and 3.6 mM) the subplots, with three replications. The physiological indices, production components, and postharvest quality of sour passion fruit were negatively affected by the increase in the electrical conductivity of irrigation water, and the effects of salt stress were intensified in the second cycle. In the first cycle, the foliar application of salicylic acid at concentrations between 1.0 and 1.4 mM partially reduced the harmful effects of salt stress on the relative water content of leaves, electrolyte leakage, gas exchange, and synthesis of photosynthetic pigments, in addition to promoting an increase in the yield and quality parameters of sour passion fruit.

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Section: Discussionsupporting

confidence: 73%

Section: Introductionmentioning

confidence: 99%

Foliar Applications of Salicylic Acid on Boosting Salt Stress Tolerance in Sour Passion Fruit in Two Cropping Cycles

Sobrinho

Silva

Lima

et al. 2023

Plants

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“…This effect occurs because plants close their stomata as a defense mechanism against water loss, which reduces transpiration and CO 2 assimilation [27,28]. Furthermore, this stomatal regulation mechanism leads to a reduction in the flow of water vapor, aiming to maintain water potential and prevent dehydration of guard cells, which ends up inducing a lower influx of CO 2 into leaf mesophyll cells, reducing transpiration [29].…”

Section: Discussionmentioning

confidence: 99%

Hydrogen Peroxide Alleviates Salt Stress Effects on Gas Exchange, Growth, and Production of Naturally Colored Cotton

Nóbrega,

Gomes,

Soares

et al. 2024

Plants

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Cotton is one of the most exploited crops in the world, being one of the most important for the Brazilian Northeast. In this region, the use of irrigation is often necessary to meet the water demand of the crop. Water is often used from underground wells that have a large amount of salt in their constitution, which can compromise the development of crops, so it is vital to adopt strategies that reduce salt stress effects on plants, such as the foliar application of hydrogen peroxide. Thus, the objective of this study was to evaluate the effects of foliar application of hydrogen peroxide on the gas exchange, growth, and production of naturally colored cotton under salt stress in the semi-arid region of Paraíba, Brazil. The experiment was carried out in a randomized block design in a 5 × 5 factorial scheme, with five salinity levels of irrigation water—ECw (0.3, 2.0, 3.7, 5.4 and 7.1 dS m−1)—and five concentrations of hydrogen peroxide—H2O2 (0, 25, 50, 75 and 100 μM), and with three replicates. The naturally colored cotton ‘BRS Jade’ had its gas exchange, growth, biomass production, and production reduced due to the effects of salt stress, but the plants were able to produce up to the ECw of 3.97 dS m−1. Foliar application of hydrogen peroxide at the estimated concentrations of 56.25 and 37.5 μM reduced the effects of salt stress on the stomatal conductance and CO2 assimilation rate of cotton plants under the estimated ECw levels of 0.73 and 1.58 dS m−1, respectively. In turn, the concentration of 12.5 μM increased water-use efficiency in plants subjected to salinity of 2.43 dS m−1. Absolute and relative growth rates in leaf area increased with foliar application of 100 μM of hydrogen peroxide under ECw of 0.73 and 0.3 dS m−1, respectively. Under conditions of low water salinity (0.3 dS m−1), foliar application of hydrogen peroxide stimulated the biomass formation and production components of cotton.

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Tolerance of sour passion fruit cultivars to salt stress in a semi-arid region

Lima

Souza

Paiva

et al. 2023

Rev. bras. eng. agríc. ambient.

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Given the quantitative scarcity of low-salinity water resources in the Brazilian semi-arid region, it is necessary to use water with a high concentration of salts. Thus, identifying salt-stress tolerant cultivars of crops is an alternative for expanding irrigated agriculture. The objective of this study was to evaluate the tolerance of passion fruit cultivars as a function of irrigation water electrical conductivity. The experimental design was randomized blocks, in a 5 × 3 factorial scheme, whose treatments consisted of the combination of five values of electrical conductivity of irrigation water - ECw (0.3, 1.1, 1.9, 2.7, and 3.5 dS m-1) and three sour passion fruit cultivars (BRS GA1, BRS SC1, and SCS437, with three replicates. Electrical conductivity of water from 0.3 dS m-1 reduces the relative water content, gas exchange, and the number of fruits and increased electrolyte leakage in the leaf blade of passion fruit plants, at 153 days after transplantation. The passion fruit cultivars BRS GA1, BRS SC1, and SCS437 were classified as sensitive, with threshold electrical conductivity of water of 0.3, 1.0, and 0.3 dS m-1, respectively.

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Physiological indices of sour passion fruit under brackish water irrigation strategies and potassium fertilization

Cited by 4 publications

References 26 publications

Foliar Applications of Salicylic Acid on Boosting Salt Stress Tolerance in Sour Passion Fruit in Two Cropping Cycles

Foliar Applications of Salicylic Acid on Boosting Salt Stress Tolerance in Sour Passion Fruit in Two Cropping Cycles

Hydrogen Peroxide Alleviates Salt Stress Effects on Gas Exchange, Growth, and Production of Naturally Colored Cotton

Tolerance of sour passion fruit cultivars to salt stress in a semi-arid region

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