scholarly journals Gas exchange of citrus rootstocks in response to intensity and duration of saline stress

2017 ◽  
Vol 38 (2) ◽  
pp. 725
Author(s):  
Roberta Chaiene Almeida Barbosa ◽  
Marcos Eric Barbosa Brito ◽  
Francisco Vanies da Silva Sá ◽  
Walter Dos Santos Soares-Filho ◽  
Pedro Dantas Fernandes ◽  
...  
Keyword(s):  
Salt Stress ◽  
Gas Exchange ◽  
Saline Water ◽  
Block Design ◽  
Water Salinity ◽  
Saline Stress ◽  
Santa Cruz ◽  
Rangpur Lime ◽  
Rough Lemon ◽  
Volkamer Lemon

Soil and water salinity cause physiological disorders in sensitive plants, such as altered gas exchange in citrus genotypes. However, it is possible to analyse these effects and to identify genotypes tolerant to salt stress. An experiment was carried out in order to evaluate the tolerance of citrus genotypes considering the irrigation with saline water during rootstock formation. The study took place under greenhouse conditions in Pombal county, Paraiba, Brazil. A randomised block design was used, with treatments arranged in a factorial scheme (5 x 8). The two factors were: [i] five salinity levels of irrigation water (0.8, 1.6, 2.4, 3.2 and 4.0 dS m-1) and [ii] eight genotypes of citrus rootstocks: 1. ‘Rangpur Santa Cruz’ lime (LCRSTC); 2. common ‘Sunki’ mandarin (TSKC) x ‘Swingle’ citrumelo (CTSW) - 028; 3. TSKC x CTSW - 033; 4. TSKC x CTSW - 041; 5. ‘Volkamer’ lemon (LVK) x ‘Rangpur’ lime (LCR) - 038; 6. ‘Sunki of Florida’ mandarin (TSKFL); 7. TSKC and 8. ‘Florida’ rough lemon (LRF). Gas exchange was evaluated at 15, 30 and 60 days after the beginning of the saline water application. High water salinity reduces gas exchange in citrus genotypes, which was more evident at 15 days from the beginning of stress. The genotypes ‘Santa Cruz Rangpur’ lime, TSKC x CTSW - 041, LVK x LCR - 038 and ‘Florida’ rough lemon exhibit a satisfactory physiological behaviour during the first 30 days of exposure to the stress, showing moderate tolerance to salt stress. The genotypes TSKC x CTSW - 033 and common ‘Sunki’ mandarin are the most sensitive to salinity.

scholarly journals GAS EXCHANGE AND CHLOROPHYLL FLUORESCENCE OF CITRUS ROOTSTOCK VARIETIES UNDER SALT STRESS

2016 ◽  
Vol 38 (2) ◽  
Author(s):  
MARCOS ERIC BARBOSA BRITO ◽  
FRANCISCO VANIES DA SILVA SÁ ◽  
WLATER DOS SANTOS SOARES FILHO ◽  
LUDERLÂNDIO DE ANDRADE SILVA ◽  
PEDRO DANTAS FERNANDES
Keyword(s):  
Salt Stress ◽  
Gas Exchange ◽  
Physiological Stress ◽  
Block Design ◽  
Saline Stress ◽  
Santa Cruz ◽  
Rangpur Lime ◽  
Rough Lemon ◽  
Volkamer Lemon ◽  
Citrus Rootstock

ABSTRACT High salt concentration in water are common in Brazilian semirad region, being important to research alternatives for use this waters on crop, like use of tolerant genotypes to salinity. Thus, in order to evaluate the saline stress perception of citrus rootstocks varieties crop from gas exchange and fluorescence analysis, an experiment was realized in greenhouse at the Center for Science and Technology Agrifood, CCTA, of Federal University of Campina Grande, UFCG, Pombal, PB, Brazil. It was studied in a randomized block design with factorial scheme (2x4), two salinity levels (0.3 and 4.0 dSm-1) and four varieties of citrus rootstocks [1 -common Sunki mandarin (TSKC), 2 - Florida Rough lemon (LRF), 3 -Santa Cruz Rangpur lime (LCRSTC) and 4-Volkamer lemon (LVK)], with three replications. The citrus rootstocks varieties grown on hydroponic system and at 90 days after sowing the plants were evaluated by gas exchange and PSII fluorescence at 0, 24 and 48 hours after application of treatments to determine the times for the physiological establishment of salt stress. The first 48h under saline conditions promoted changes in gas exchange and PSII fluorescence in varieties TSKC, LRF and LCRSTC indicating the begin of physiological stress; the common ‘Sunki’ mandarin and the ‘Florida Rough’ lemon are the more sensitive genotypes to saline stress, in order hand the ‘Santa Cruz Rangpur’ lime and ‘Volkamer’ lemon are the genotypes more tolerant.

scholarly journals Screening of citrus scion-rootstock combinations for tolerance to water salinity during seedling formation

2020 ◽  
Vol 43 ◽  
pp. e48163
Author(s):  
Marcos Eric Barbosa Brito ◽  
Pedro Dantas Fernandes ◽  
Hans Raj Gheyi ◽  
Lauriane Almeida dos Anjos Soares ◽  
Walter dos Santos Soares Filho ◽  
...  
Keyword(s):  
Dry Matter ◽  
Block Design ◽  
Water Salinity ◽  
Saline Stress ◽  
Rangpur Lime ◽  
Randomized Block Design ◽  
Volkamer Lemon ◽  
Acid Lime ◽  
Tolerance To Salinity ◽  
Swingle Citrumelo

Arid and semiarid regions are vulnerable to water deficits and salinity. Citrus plants are sensitive to saline stress and require the use of tolerant scion-rootstock combinations. Thus, this study aimed to evaluate and classify citrus scion-rootstock combinations with respect to their tolerance to salinity during seedling formation in a protected environment. An experiment was conducted in a randomized block design with a 5 x 12 x 2 factorial scheme corresponding to five levels of water salinity (0.8, 1.6, 2.4, 3.2, and 4.0 dS m-1) applied in 12 citrus rootstocks grafted with two scion varieties: ‘Tahiti’ acid lime and ‘Star Ruby’ grapefruit. The scion-rootstock combinations were evaluated for accumulated dry matter and survival index at 330 days after sowing the rootstocks. Salinity exerted different effects on the dry matter formation of scion-rootstock combinations. ‘Star Ruby’ was less sensitive to salinity, particularly when the rootstocks were the hybrids from ‘Sunki of Florida’ mandarin (TSKFL) with ‘Troyer’ citrange (CTTR) – 013 (TSKFL x CTTR – 013), common ‘Sunki’ mandarin (TSKC) with ‘Argentina’ citrange (CTARG) – 019 (TSKC x CTARG – 019), TSKC with ‘Swingle’ citrumelo (CTSW) – 031 (TSKC x CTSW – 031), and the trifoliate hybrid (HTR) - 069, as well as the varieties Volkamer lemon and Santa Cruz Rangpur lime. When grafted with ‘Tahiti’ acid lime, the rootstocks displaying the less sensitive to salinity were TSKFL x CTTR - 013 and TSKC x CTARG - 019.

scholarly journals GAS EXCHANGE, CHLOROPLAST PIGMENTS AND GROWTH OF PASSION FRUIT CULTIVATED WITH SALINE WATER AND POTASSIUM FERTILIZATION 1

2020 ◽  
Vol 33 (1) ◽  
pp. 184-194
Author(s):  
GEOVANI SOARES DE LIMA ◽  
COSMO GUSTAVO JACOME FERNANDES ◽  
LAURIANE ALMEIDA DOS ANJOS SOARES ◽  
HANS RAJ GHEYI ◽  
PEDRO DANTAS FERNANDES
Keyword(s):  
Gas Exchange ◽  
Saline Water ◽  
Block Design ◽  
Co2 Assimilation ◽  
Passion Fruit ◽  
Water Salinity ◽  
Chloroplast Pigments ◽  
Potassium Fertilization ◽  
Randomized Block Design ◽  
Fruit Plants

ABSTRACT The objective of this study was to evaluate the gas exchange, chloroplast pigments and growth of ‘BRS Rubi do Cerrado’ passion fruit as a function of irrigation with saline water and potassium fertilization in the seedling formation stage. The experiment was conducted under greenhouse conditions in the municipality of Pombal-PB, Brazil. A randomized block design was used in 5 x 2 factorial scheme, corresponding to five levels of water electrical conductivity - ECw (0.3, 1.1, 1.9, 2.7 and 3.5 dS m-1) and two doses of potassium - KD (50 and 100% of the recommendation), with four replicates and two plants per plot. Water salinity from 0.3 dS m-1 reduced the stomatal opening, transpiration, CO2 assimilation and inhibited the growth of ‘BRS Rubi do Cerrado’ passion fruit plants, at 40 days after sowing. There was no CO2 restriction in the substomatal cavity of passion fruit plants grown under water salinity from 0.3 dS m-1. Potassium dose of 150 mg kg-1 of soil, corresponding to 100%, intensified the effect of salt stress on the assimilation rate and instantaneous carboxylation efficiency in 'BRS Rubi do Cerrado' passion fruit. There was interaction between water salinity levels and potassium doses for the chlorophyll a and b contents of 'BRS Rubi do Cerrado' passion fruit.

scholarly journals Morphophysiology of Tahiti lime grafted onto Sunki mandarin hybrids under salt stress

2019 ◽  
Vol 23 (8) ◽  
pp. 598-606
Author(s):  
Luderlândio A. Silva ◽  
Marcos E. B. Brito ◽  
Pedro D. Fernandes ◽  
Francisco V. da S. Sá ◽  
Rômulo C. L. Moreira ◽  
...  
Keyword(s):  
Salt Stress ◽  
Saline Water ◽  
Block Design ◽  
Flowering Stage ◽  
Gas Exchanges ◽  
Rangpur Lime ◽  
Randomized Block Design ◽  
Irrigation Water Salinity ◽  
Electrical Conductivities ◽  
One Year

ABSTRACT This study aimed to evaluate the growth and physiology of citrus scion/rootstock combinations irrigated with saline water until the pre-flowering stage. The experiment was conducted in drainage lysimeters with capacity for 150 dm3, in randomized block design in a 2 x 10 factorial scheme, corresponding to two electrical conductivities of water (S1 = 0.3 and S2 = 3.0 dS m-1) and ten scion/rootstock combinations (nine hybrids and one commercial variety) grafted with Tahiti lime, in three repetitions and one plant per plot. Grafted seedlings were transplanted one year after sowing, subjected to salt stress from 15 days after transplanting until the pre-flowering period, and evaluated for gas exchanges and growth. The irrigation with 3.0 dS m-1 saline water did not influence the photosynthetic activity of the studied citrus scion/rootstock combinations until the pre-flowering. The genotype Santa Cruz Rangpur lime (LCRSTC) was more sensitive to irrigation water salinity in terms of growth. The least sensitive combinations to salinity were Tahiti lime grafted onto TSKFL x (LCR x TR) - 018, TSKFL x TRBK - 011 and TSKFL x TRBK - 30.

scholarly journals Quantum efficiency of photosystem II and production of orange under salt stress and nitrogen fertilization

2016 ◽  
Vol 20 (5) ◽  
pp. 434-440 ◽  
Author(s):  
Jônatas R. M. de Sousa ◽  
Hans R. Gheyi ◽  
Marcos E. B. Brito ◽  
Claudivan F. de Lacerda ◽  
Francisco V. da Silva ◽  
...  
Keyword(s):  
Salt Stress ◽  
Photosystem Ii ◽  
Quantum Efficiency ◽  
Saline Water ◽  
Block Design ◽  
Fruit Production ◽  
N Fertilization ◽  
Yield Potential ◽  
Rangpur Lime ◽  
Maximum Quantum Efficiency

ABSTRACT This study aimed to evaluate the salt tolerance of 'Mimo do Céu' orange grafted onto three rootstocks using physiological parameters such as maximum quantum efficiency of photosystem II (PSII) and the production of fruits. It also evaluated the effectiveness of increased nitrogen (N) fertilization in reducing the effects of salt stress. Two concomitant experiments were carried out under controlled conditions, using drainage lysimeters. The Experiment I evaluated the effects of the application of five levels of saline water on three combinations of scion-rootstocks grafted with 'Mimo de Ceu' orange, in a randomized block design with three replicates in a 5 x 3 factorial scheme. The Experiment II evaluated the application of two N levels (100 and 200% of recommendation) in three scion-rootstock combinations irrigated with water of electrical conductivity of 3.0 dS m-1, in a 3 x 2 factorial scheme, with three replicates. The maximum quantum efficiency of PSII was inhibited in citrus plants under salt stress. 'Mimo do Ceu' orange grafted onto 'Common' Rangpur lime has higher yield potential. The increase in N dose did not reduce the deleterious effects of water salinity on fruit production.

scholarly journals Saline Water, Pit Coating and Calcium Fertilization on Chlorophyll, Fluorescence, Gas Exchange and Production in Passion Fruit

2019 ◽  
Vol 11 (2) ◽  
pp. 319
Author(s):  
Marlene A. F. Bezerra ◽  
Lourival F. Cavalcante ◽  
Francisco T. C. Bezerra ◽  
Aldeir R. Silva ◽  
Flaviano F. Oliveira ◽  
...  
Keyword(s):  
Gas Exchange ◽  
Saline Water ◽  
Net Photosynthesis ◽  
Fruit Production ◽  
Passion Fruit ◽  
Plant Production ◽  
Water Salinity ◽  
Saline Stress ◽  
Leaf Chlorophyll ◽  
Calcium Fertilization

In plants sensitive to salinity, such as passion fruit, irrigation with saline water can cause physiological disturbances and reduce fruit production, necessitating the use of cultural practices that mitigate saline stress. The objective of this study was to evaluate the effects of water salinity, pit coating with high-strength polyethylene film, and calcium fertilization on the physiological and productive aspects of passion fruit ‘BRS Gigante Amarelo’. The treatments were arranged in split plot in the scheme 2WS × (2LP × 5DC), corresponding to water salinity (0.3 and 4.0 dS m-1) as the main plot, side coating of pits (without and with) doses of calcium (0; 30; 60; 90 and 120 kg ha-1). During the flowering phase, we evaluated leaf chlorophyll indices, fluorescence kinetics, and gas exchange. The increase in calcium doses up to 60 kg ha-1 increased leaf chlorophyll and quantum efficiency. The stomata did not restrict gas exchange, but salinity resulted in reduced net photosynthesis and plant production. The lateral coating of the pits intensified the reduction in salinity-promoted production, while calcium mitigated the effects of the salts. Entisol cultivated with passion fruit should not be irrigated with saline water of 4.0 dS m-1; lateral pit coating is not advised. In an Entisol with an initial calcium level of 1.92 cmolc dm-3, the recommended application dose is 60 kg ha-1 for passion fruit cultivation.

scholarly journals Foliar application of H2O2 as salt stress attenuator in ‘BRS Rubi do Cerrado’ sour passion fruit

2021 ◽  
Vol 42 (4) ◽  
pp. 2253-2270
Author(s):  
Jailton Garcia Ramos ◽  
◽  
Geovani Soares de Lima ◽  
Vera Lucia Antunes de Lima ◽  
Francisco Jean da Silva Paiva ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Salt Stress ◽  
Gas Exchange ◽  
Foliar Application ◽  
Saline Water ◽  
Intercellular Co2 Concentration ◽  
Co2 Concentration ◽  
Passion Fruit ◽  
Water Salinity ◽  
Sour Passion Fruit

Irrigation with saline water causes a reduction in yield, especially in semi-arid regions. Cultivation strategies have been developed to mitigate salt stress on plants, such as the use of hydrogen peroxide. The objective of this study was to evaluate the attenuating effect of hydrogen peroxide on the gas exchange and growth of ‘BRS Rubi do Cerrado’ sour passion fruit cultivated under irrigation with saline water. The design was completely randomized in split-plot plots, with water salinity levels ECw (0.6, 1.2, 1.8, 2.4, and 3.0 dS m-1) considered the plots and the concentrations of hydrogen peroxide H2O2 (0, 15, 30, and 45 μM) considered the subplots, with three replicates. Gas exchange (stomatal conductance, transpiration, CO2 assimilation rate, intercellular CO2 concentration, instantaneous water use efficiency, and instantaneous carboxylation efficiency), and absolute and relative growth rates in stem diameter were evaluated. An increase in irrigation water salinity from 0.6 dS m-1 reduced gas exchange, and exogenous application of hydrogen peroxide did not promote a significant effect on gas exchange. However, foliar application of hydrogen peroxide at 15 μM increased the growth of ‘BRS Rubi do Cerrado’ sour passion fruit.

scholarly journals Calcium in the mineral nutrition of yellow passion fruit cultivated in lined pits and with saline water

2021 ◽  
Vol 25 (4) ◽  
pp. 256-263
Author(s):  
Marlene A. F. Bezerra ◽  
Lourival F. Cavalcante ◽  
Francisco T. C. Bezerra ◽  
Walter E. Pereira ◽  
Flaviano F. de Oliveira ◽  
...  
Keyword(s):  
Salt Stress ◽  
Saline Water ◽  
Block Design ◽  
Passion Fruit ◽  
Water Salinity ◽  
Water Losses ◽  
Randomized Block Design ◽  
Full Flowering ◽  
Calcium Fertilization ◽  
Yellow Passion Fruit

ABSTRACT Nutritional status is an important tool in salinity management, because salt stress interferes with both the absorption and the assimilation of mineral nutrients by plants. The objectives of this experiment were to evaluate the effects of water salinity, lateral protection of pits against water losses and calcium doses on the leaf concentration of macronutrients and sodium of yellow passion fruit cv. BRS GA1. The treatments were arranged in a randomized block design in split plots in a 2 × (2 × 5) factorial scheme, corresponding to water salinity (0.3 and 4.0 dS m-1) in the main plot, and the combinations between lateral protection of pits (without and with) and calcium doses (0, 30, 60, 90 and 120 kg ha-1) in the subplots. Leaf concentrations of macronutrients and sodium were determined at the phenological stage of full flowering. Irrigation of yellow passion fruit with 4.0 dS m-1 water decreased the leaf concentrations of macronutrients. The lining of the pits compromised macronutrient concentration in the plants. Calcium fertilization is recommended for yellow passion fruit cultivated in Entisol with low calcium concentration at the dose of 60 kg ha-1, because it raises nitrogen and calcium concentrations in plants irrigated with non-saline water and magnesium and sulfur concentrations in those irrigated with saline water. Calcium attenuates salt stress because it promotes the accumulation of macronutrients in yellow passion fruit under saline conditions.

scholarly journals Fisiologia da percepção do estresse salino em híbridos de tangerineira “Sunki Comum” sob solução hidropônica salinizada

2015 ◽  
Vol 6 (4) ◽  
pp. 463 ◽  
Author(s):  
Francisco Vanies da Silva Sá ◽  
Marcos Eric Barbosa Brito ◽  
Luderlândio de Andrade Silva ◽  
Romulo Carantino Lucena Moreira ◽  
Pedro Dantas Fernandes ◽  
...  
Keyword(s):  
Chlorophyll Fluorescence ◽  
Gas Exchange ◽  
Salinity Stress ◽  
Salinity Tolerance ◽  
Saline Water ◽  
Water Solution ◽  
Block Design ◽  
Saline Stress ◽  
Randomized Block Design ◽  
Stress Changes

In order to study the physiology of perception of saline stress in ‘Common Sunki’ mandarin hybrids, an experiment was realized in a greenhouse at the CCTA - UFCG, Pombal, PB, Brazil,using using a randomized block design with a 2x4 factorial , with two levels of salinity (0.3 and 4.0 dS m-1) and four ‘Common Sunki’ mandarin hybrids (1 - TSKC x CTARG–019; 2 - TSKC x CTSW–028; 3 - TSKC x CTSW–033 and 4 - TSKC x CTSW-041), with three replications and four plants per plot. The plants were grown hydroponically and 90 days after sowing, a saline water solution was applied on rootstocks and evaluations of gas exchange and chlorophyll fluorescence were carried out 24 and 48 hours after saline stress. Changes on physiologic conditions were observed in the hybrids TSKC x CTSW - 028, TSKC x CTSW - 033 and TSKC x CTSW - 041 during the first 24 hours of saline stress. Fot the hybrid TSKC x CTARG – 019, changes were observed after 48 hours od salinity stress. According to salinity tolerance, the hybrids could be classified as follows: TSKC x CTARG - 019 > TSKC x CTSW - 028 = TSKC x CTSW – 041 > TSKC x CTSW - 033.

scholarly journals Gas exchanges and growth of passion fruit seedlings under salt stress and hydrogen peroxide1

2019 ◽  
Vol 49 ◽  
Author(s):  
André Alisson Rodrigues da Silva ◽  
Geovani Soares de Lima ◽  
Carlos Alberto Vieira de Azevedo ◽  
Hans Raj Gheyi ◽  
Leandro de Pádua Souza ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Hydrogen Peroxide ◽  
Salt Stress ◽  
Leaf Area ◽  
Irrigation Water ◽  
Saline Water ◽  
Block Design ◽  
Passion Fruit ◽  
Saline Stress ◽  
Gas Exchanges

ABSTRACT The semi-arid region of the Brazilian Northeast has adequate edaphoclimatic conditions for the passion fruit production, but the water used for irrigation commonly has high concentrations of salts that are harmful to the plant growth and development. A previous supply of hydrogen peroxide induces the acclimation of plants under saline stress conditions, reducing deleterious effects on their growth and physiology. This study aimed to evaluate the gas exchanges and growth of passion fruit as a function of irrigation with saline water and exogenous application of hydrogen peroxide. The experiment was carried out under greenhouse conditions, using a randomized block design, in a 4 x 4 factorial arrangement, being four levels of irrigation water electrical conductivity (0.7 dS m-1, 1.4 dS m-1, 2.1 dS m-1 and 2.8 dS m-1) and four hydrogen peroxide concentrations (0 µM, 25 µM, 50 µM and 75 µM), with four replicates and two plants per plot. The hydrogen peroxide application attenuated the deleterious effects of the irrigation water salinity on transpiration, CO2 assimilation rate, internal carbon concentration, plant height and leaf area of yellow passion fruit, at 60 days after sowing, with the concentration of 25 µM being the most efficient. Irrigation using water with electrical conductivity above 0.7 dS m-1 negatively affects the gas exchanges and growth of passion fruit, being the stomatal conductance and leaf area the most sensitive variables to the salt stress.

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