Water relations and gas exchange in castor bean irrigated with saline water of distinct cationic nature

Lima, Geovani Soares de; Gheyi, Hans Raj; Nobre, Reginaldo Gomes; Soares, Lauriane Almeida dos Anjos; Xavier, Diego Azevedo; Santos, José António dos

doi:10.5897/ajar2015.9606

Cited by 16 publications

(11 citation statements)

References 29 publications

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“…the salt concentration of the soil solution, allowing for plant tissue hydration and thus delaying deleterious processes caused by water deficit due to the increase in the osmotic concentration of the soil solution (SANTOS et al, 2012). Reduction in leaf osmotic potential due to saline water irrigation has also been observed in other crops, such as jatropha ), peanut (SANTOS et al, 2012 and castor bean (LIMA et al, 2015). Based on the regression equations for percentage of cell membrane damage -%D ( Figure 1B), plants under ECw of 0.8 and 3.8 dS m -1 fitted to a linear model, and %D decreased in plants subjected to 0.8 dS m -1 as K dose increased, with reduction of 9.66% for every 25% increase in K 2 O doses.…”

Section: Results and Discussonmentioning

confidence: 95%

Saline water and potassium fertilization in cultivation of grafted west indian cherry BRS 366 Jaburu

Pinheiro¹,

Lima²,

Gheyi³

et al. 2019

Biosci. J.

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Agricultural exploitation in the semi-arid region of Northeast Brazil depends on the use of irrigation to guarantee safe production of crops. Nevertheless, the waters commonly used in this region have high levels of salts and require management strategies that make their use possible in agriculture. In this context, the present study aimed to evaluate water relations, photosynthetic pigments and growth of grafted West Indian cherry as a function of saline water irrigation and potassium (K) fertilization. The study was conducted under greenhouse conditions in lysimeters filled with eutrophic Regolithic Neosol with sandy loam texture, in the municipality of Campina Grande-PB, Brazil. Treatments were distributed in randomized blocks and consisted of two factors: two levels of irrigation water electrical conductivity -ECw (0.8 and 3.8 dS m -1 ) and four K doses (50, 75; 100 and 125% of the recommendation), with three replicates and one plant per plot. The 100% dose corresponded to 19.8 g of K 2 O per plant per year. The West Indian cherry crop was sensitive to water salinity of 3.8 dS m -1 in the post-grafting phase, resulting in a decline in photosynthetic pigment content and growth. Increasing K doses reduced the percentage of cell membrane damage and promoted increase in the synthesis of chlorophyll a and carotenoids in West Indian cherry plants. There was significant interaction between salinity levels and K doses for the leaf osmotic potential, water saturation deficit, percentage of cell membrane damage and chlorophyll b content in West Indian cherry plants.

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Section: Results and Discussonmentioning

confidence: 95%

Saline water and potassium fertilization in cultivation of grafted west indian cherry BRS 366 Jaburu

Pinheiro¹,

Lima²,

Gheyi³

et al. 2019

Biosci. J.

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“…The water saturation deficit (WSD) was determined according to the methodology described by Lima et al (2015), using Equation (2):…”

Section: Methodsmentioning

confidence: 99%

“…In cultivated plants, innumerous effects are caused by the excess of salts in the soil, including disorders in the permeability of cell membranes, alterations in stomatal conductance, photosynthesis and ionic balance, which lead to reduction in plant growth and development, regardless of the nature of the salts (Silva et al, 2014;Lima et al, 2015). Thus, it becomes necessary to identify the most adequate strategy for the management of water and/or soil salinity, aiming to maintain the physiological status of the plants cultivated under salt stress conditions.…”

Section: Introductionmentioning

confidence: 99%

Water Relations and Gas Exchanges of West Indian Cherry under Salt Stress and Nitrogen and Phosphorus Doses

Sá¹,

Gheyi²,

Lima³

et al. 2017

JAS

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This study aimed to evaluate the interaction between the fertilization with nitrogen (N) and phosphorus (P) and irrigation with saline water on the water relations, gas exchanges and chlorophyll a fluorescence in West Indian cherry in the vegetative stage. The study was carried out in protected environment, using lysimeters filled with clay loam Regolithic Neosol, with low P content, installed in a randomized block design, arranged in a factorial scheme with five levels of electrical conductivity of irrigation water (ECw), and four managements of P and N fertilization, with three replicates and one plant per plot. Along the experiment, water relations, gas exchanges and chlorophyll a fluorescence were evaluated in West Indian cherry plants. The increase in irrigation water salinity reduces the gas exchanges of the plants, but the increment of 40% in N supply increases the photosynthetic activity of West Indian cherry at recommendation levels higher than 100:100% of the P/N ratio, when irrigated with ECw of up to 3.0 dS m

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“…After this period, excess water was removed with a paper towel, to obtain the turgid weight (TW), and the samples were taken to the oven (temperature ≈ 65 ºC ± 3 ºC, until constant weight) to obtain the dry weight (DW). RWC and WSD were determined based on the methodology described by Lima et al (2015), using Eq. 3 and 4:…”

Section: Methodsmentioning

confidence: 99%

“…Among the strategies used to mitigate the effects of saline stress on crops, adequate fertilization management has stood out due to the positive responses, especially using phosphorus and nitrogen (LIMA et al, 2015;SÁ et al, 2017). This fact occurs because these nutrients are essential for plants, in metabolic and structural functions, including in photosynthesis, a vital mechanism for plant survival.…”

Section: Introductionmentioning

confidence: 99%

Ecophysiology of west indian cherry irrigated with saline water under phosphorus and nitrogen doses

Sá¹,

Gheyi²,

Lima³

et al. 2019

Biosci. J.

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The quantitative and qualitative scarcity of water resources is a frequent problem in the semi-arid region of the Brazilian Northeast. The availability of water for irrigation with high content of dissolved salts is common, affecting the growth and development of the crops. Thus, it is necessary to adopt strategies that allow the establishment of irrigated agriculture in this region. The objective of this study was to evaluate the effect of water salinity and phosphorus/nitrogen combinations on the ecophysiology of the West Indian cherry grafted in the first year of cultivation. The research was carried out in a protected environment, in lysimeters filled with a Regolithic Neosol of loamy clay texture, having low initial phosphorus content. The experiment was arranged in a randomized block design, arranged in a 5x4 factorial scheme, with five levels of electrical conductivity of the irrigation water-ECw (0.6, 1.4, 2.2, 3.0 and 3.8 dS m-1) and four managements of fertilization with phosphorus and nitrogen (100:100; 140:100; 100:140 and 140:140% P/N of the recommendation), with three replications, each plot consisting of one plant. Increased salinity of irrigation water reduced growth, photosynthesis and the production of West Indian cherry. Fertilization with 140% of recommendation of the phosphorus and nitrogen minimizes the deleterious effect of salinity on West Indian cherry irrigated with water up to 3.0 dS m-1 .

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Water relations and gas exchange in castor bean irrigated with saline water of distinct cationic nature

Cited by 16 publications

References 29 publications

Saline water and potassium fertilization in cultivation of grafted west indian cherry BRS 366 Jaburu

Saline water and potassium fertilization in cultivation of grafted west indian cherry BRS 366 Jaburu

Water Relations and Gas Exchanges of West Indian Cherry under Salt Stress and Nitrogen and Phosphorus Doses

Ecophysiology of west indian cherry irrigated with saline water under phosphorus and nitrogen doses

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