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 Growth and fluorescence of ‘Tahiti’ acid lime/rootstock on Sunki mandarin hybrids under salinity

2019 ◽  
Vol 35 (4) ◽  
Author(s):  
Luderlândio de Andrade Silva ◽  
Marcos Eric Barbosa Brito ◽  
Pedro Dantas Fernandes ◽  
Francisco Vaniés da Silva Sá ◽  
Rômulo Carantino Lucena Moreira ◽  
...  
Keyword(s):  
Chlorophyll Fluorescence ◽  
Saline Water ◽  
Block Design ◽  
Saline Stress ◽  
Rangpur Lime ◽  
Randomized Block Design ◽  
Salinity Levels ◽  
Acid Lime ◽  
One Year ◽  
Drainage Lysimeter

The objective of this study was to evaluate the ecophysiological behavior of ‘Tahiti’ acid lime/rootstock grafted on Sunki mandarin hybrids during the prefloration stage of the plants, in the field, under saline stress. The progenies originating from crossings of the ‘Sunki’ mandarin with ‘Rangpur’ lime and Poncirus trioliata, as rootstocks, combined with the ‘Tahiti’ acid lime as a scion. The experiment was carried out under field conditions, at the Federal University of Campina Grande (UFCG), Pombal PB fields. In drainage lysimeter of 150 dm3, studying 10 scion/rootstock combinations, irrigated with two water salinity levels (CEa) (S1 = 0.3 and S2 = 3.0 dS m-1) making a 10 x 2 factorial scheme. The experimental design was a randomized block design, with 3 replicates and each plot consisting of a useful plant, totalizing 60 parcels. The scion/rootstock plants were transplanted at one year of age from the rootstocks sowing, being the beginning of the applications of the saline stress to the 15 days after the transplant lasting until the period of flowering, that is, up to 195 days after transplanting, During this period the plants were analyzed for growth and chlorophyll fluorescence a. The combinations less sensitive to salinity were composed of the ‘Tahiti’ grafted with TSKFL x (LCR x TR) - 018, TSKFL x TRBK - 011 and TSKFL x TRBK - 030, it being possible to use saline water with up to 3.0 dS m-1 in irrigation. Salinity did not damage the biochemical phase of the scion/rootstock combinations, only affecting the initial fluorescence of the lighted tissue.  

scholarly journals Physiological responses of beet plants irrigated with saline water and silicon application

2020 ◽  
Vol 11 ◽  
pp. E3113
Author(s):  
José Sebastião de Melo Filho ◽  
Toshik Iarley da Silva ◽  
Anderson Carlos de Melo Gonçalves ◽  
Leonardo Vieira de Sousa ◽  
Mario Leno Martins Véras ◽  
...  
Keyword(s):  
Stomatal Conductance ◽  
Gas Exchange ◽  
Carbon Concentration ◽  
Saline Water ◽  
Block Design ◽  
Essential Element ◽  
Net Photosynthesis ◽  
Crop Productivity ◽  
Experimental Unit ◽  
Randomized Block Design

Although not considered an essential element, silicon can be used to increase crop productivity, especially under stress conditions. In this sense, the objective was to evaluate the gas exchange of beet plants irrigated with saline water depending on the application of silicon. The experiment was conducted in a randomized block design, in a 5 x 5 factorial, referring to five levels of electrical conductivity of irrigation water (ECw): (0.5; 1.3; 3.25; 5.2 and 6.0 dS m-1) and five doses of silicon (0.00; 2.64; 9.08; 15.52 and 18.16 mL L-1), with six beet plants as an experimental unit. The effect of treatments on beet culture was evaluated at 30 and 60 days after irrigation with saline water from measurements of internal carbon concentration, stomatal conductance, net photosynthesis rate, instantaneous water use efficiency and instantaneous carboxylation efficiency using the LCpro+Sistem infrared gas analyzer (IRGA). Irrigation with saline water reduced the gas exchange of beet plants at 60 days after irrigation, but at 30 days after irrigation, the use of saline water increased stomatal conductance, transpiration rate and internal carbon concentration. The application of silicon decreased stomatal conductance, internal carbon concentration and efficiency in the use of water, but increased the rate of net photosynthesis, the rate of transpiration and instantaneous efficiency of carboxylation at 30 and 60 days after irrigation.

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 Plant development, gas exchanges and pigments of Mesosphaerum suaveolens submitted to osmoconditioning and saline stress

2020 ◽  
Vol 80 (1) ◽  
Author(s):  
Francisco Romário Andrade Figueiredo ◽  
Jackson Silva Nóbrega ◽  
Reynaldo Teodoro de Fátima ◽  
Toshik Iarley da Silva ◽  
Rodrigo Garcia da Silva Nascimento ◽  
...  
Keyword(s):  
Irrigation Water ◽  
Saline Water ◽  
Block Design ◽  
Statistical Design ◽  
Saline Stress ◽  
Negative Effects ◽  
Gas Exchanges ◽  
Chlorophyll Pigments ◽  
Randomized Block Design ◽  
Dry Biomass

Salinity is one of the main plant abiotic stresses which affects the establishment and development crops. Hence, the search for technologies that minimize the damage caused by salinity is essential. The aim of the present work was to evaluate the effect of salinity stress and osmotic conditioning of seeds on the biomass, gas exchanges and chlorophyll pigments in Mesosphaerum suaveolens (L.) Kuntze. The statistical design adopted was a randomized block design, combined according to the Central Composite Design, referring to electrical conductivities of irrigation water and osmotic potentials, with minimum (- α) and maximum (α) values of 0.5 and 10.0 dS m-1 and 0.0 and -1.0 MPa, respectively, totaling nine combinations. The characteristics of dry biomass, gas exchange and chlorophyll indices were evaluated at 45 days after irrigation with saline water started. The salinity of irrigation water severely affected the dry biomass and the gas exchanges of M. suaveolens. Irrigation water of electrical conductivity above 3.2 dS m-1 caused reductions in chlorophyll a, b and total contents in M. suaveolens plants. Seed osmoconditioning did not attenuate the negative effects of saline stress on M. suaveolens plants.

scholarly journals Gas exchange, growth, and production of mini-watermelon under saline water irrigation and phosphate fertilization

2020 ◽  
Vol 41 (6supl2) ◽  
pp. 3039-3052
Author(s):  
Geovani Soares de Lima ◽  
◽  
Charles Macedo Félix ◽  
Saulo Soares da Silva ◽  
Lauriane Almeida dos Anjos Soares ◽  
...  
Keyword(s):  
Salt Stress ◽  
Gas Exchange ◽  
Saline Water ◽  
Block Design ◽  
Intercellular Co2 Concentration ◽  
Co2 Concentration ◽  
Co2 Assimilation ◽  
Northeastern Brazil ◽  
Randomized Block Design ◽  
Semi Arid Region

In the semi-arid region of Northeastern Brazil, due to the occurrence of excess salts, both in the water and soil, plants are constantly exposed to various conditions of abiotic stress. Thus, it is extremely important to identify methods capable of minimizing the effects of salt stress on plants as a way to ensure the expansion of irrigated areas. In this context, the objective of this study was to evaluate the gas exchange, growth, and production of mini-watermelon irrigated with saline waters and fertilized with phosphorus. The experiment was conducted in pots under greenhouse conditions in Pombal, PB, Brazil, using a randomized block design in a 5 x 4 factorial scheme, corresponding to five levels of electrical conductivity of irrigation water—ECw (0.3, 1.3, 2.3, 3.3, and 4.3 dS m-1), four phosphorus doses— PD (60, 80, 100, and 120% of the recommendation), and with three replicates. Watermelon plants cv. Sugar Baby were sensitive to water salinity greater than 0.3 dS m-1, with more pronounced inhibition of gas exchange, growth, and production. Reduction in the CO2 assimilation rate of watermelon plants cv. Sugar Baby was associated with factors of stomatal and non-stomatal origin. Phosphorous doses corresponding to 73 and 88% of the recommended values promoted an increase in the intercellular CO2 concentration and stem diameter of mini-watermelon plants. P2O5 doses ranging from 60 to 120% of the recommendation did not mitigate the effects of salt stress on the cultivation of watermelon cv. Sugar Baby.

scholarly journals Physiological indices of West Indian cherry (Malpighia emarginata) irrigated with saline water under nitrogen and phosphorus doses

2019 ◽  
pp. 1141-1148
Author(s):  
Francisco Vanies da Silva Sá ◽  
Hans Raj Gheyi ◽  
Geovani Soares de Lima ◽  
Romulo Carantino Lucena Moreira ◽  
Adaan Sudário Dias ◽  
...  
Keyword(s):  
Saline Water ◽  
Block Design ◽  
Membrane Damage ◽  
West Indian ◽  
N Fertilization ◽  
Phosphorus Fertilization ◽  
Saline Stress ◽  
Nitrogen And Phosphorus ◽  
Relative Growth ◽  
Randomized Block Design

The objective of this study was to evaluate the interaction of nitrogen and phosphorus fertilization and irrigation with saline water on the absolute and relative growth of West Indian cherry plant in vegetative phase. The research was carried out in protected environment, using lysimeters filled with clay loam Regolithic Neosol, with low P content. The experiment was set up in randomized block design arranged in a factorial scheme with five levels of irrigation water electrical conductivity (0.6; 1.4; 2.2; 3.0 and 3.8 dS m-1) and four managements of P and N fertilization – P/N (100:100; 140:100; 100:140 and 140:140% P/N) with three replicates and one plant per plot. Seedlings of West Indian cherry, cultivars BRS 366-Jaburu, was cleft-grafted on a local rootstock cultivar, from the Seed Garden of EMBRAPA Tropical Agroindustry. The plants were evaluated for absolute and relative growth of the rootstock and graft. The results showed that 40% increase in nitrogen and/or phosphorus supply can increase growth, chlorophyll content and reduced salt stress damage due to saline water in plants up to ECw = 3.0 dS m-1. The combined increase in nitrogen and phosphorus doses, 140:140% P/N, reduced the deleterious effects of saline stress on growth, chloroplastin pigments and membrane damage of the leaf cells of the West Indian cherry plants.

scholarly journals SALINE STRESS AND EXOGENOUS APPLICATION OF PROLINE IN CASHEW ROOTSTCK

2020 ◽  
Vol 28 ◽  
pp. 488-498
Author(s):  
Leandro de Pádua Souza ◽  
Reginaldo Gomes Nobre ◽  
Hans Raj Gheyi ◽  
Reynaldo Teodoro de Fatima ◽  
Joicy Lima Barbosa
Keyword(s):  
Foliar Application ◽  
Saline Water ◽  
Block Design ◽  
Limiting Factors ◽  
Irrigated Agriculture ◽  
Saline Stress ◽  
Exogenous Application ◽  
Randomized Block Design ◽  
Proline Concentration ◽  
Different Levels

The scarcity of good quality water and the occurrence of long dry periods are limiting factors for irrigated agriculture, especially in semiarid regions, which induces the use of saline water and technologies that enable its use in agriculture. In this context, the objective of the present study was to evaluate the influence of exogenous application of proline on growth and phytomass of BRS 226 Planalto precocious dwarf cashew rootstock irrigated with water of different levels of salinity. The study was performed in a greenhouse, in the municipality of Pombal - PB, in a protected environment, using a randomized block design in a 5 x 4 factorial scheme. The treatments consisted of different levels of electrical conductivities of irrigation water – ECw (0.3; 1.0; 1.7; 2.4 and 3.1 dS m-1) associated with foliar application of proline - P (0, 4, 8 and 12 mM), with three repetitions and two plants per plot. The irrigation with saline water of up to 0.85 dS m-1 can be used for the production of BRS 266 cashew rootstck. Proline concentration of 8 mM promoted largest dry phytomass of the BRS 226 Planalto cashew rootstock. The increase in proline concentration up to 12 mM applied via leaf does not attenuate the deleterious effects of salinity on the absolute growth rate of plant height and on the fresh and dry leaf phytomass of the BRS 226 Planalto cashew rootstock.

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 Phytomass accumulation and mineral composition of cowpea (Vigna unguiculata) under salt stress and phosphate fertilization

2019 ◽  
pp. 1149-1154
Author(s):  
Francisco Vanies da Silva Sá ◽  
Miguel Ferreira Neto ◽  
Yuri Bezerra de Lima ◽  
Emanoela Pereira de Paiva ◽  
Ana Cláudia da Silva ◽  
...  
Keyword(s):  
Salt Stress ◽  
Mineral Composition ◽  
Saline Water ◽  
Block Design ◽  
Phosphate Fertilizer ◽  
Recommended Dose ◽  
Saline Stress ◽  
Sodium Accumulation ◽  
Randomized Block Design ◽  
Phosphate Fertilization

This study aimed to evaluate the effect of irrigation with saline water and phosphate fertilization on phytomass accumulation and tissue mineral composition of cowpea shoots. The research was carried out in a greenhouse utilizing randomized block design in a 5 x 3 factorial scheme consisting of five levels salinity of irrigation water (0.5 as control, 1.5, 2.5 3.5 and 4.5 dS m-1) and three doses of P2O5- (60, 100 and 140% from a recommended dose of 60 kg P2O5- ha-1), with 5 replicates. The plants were grown in pots up to flowering and then phytomass accumulation and mineral composition of cowpea (indicate cultivar name) shoot were measured. Irrigation with saline water from 0.8 dS m-1 reduced phytomass accumulation and mineral composition of cowpea plants, making the plants to be considered moderately tolerant up to EC 2.5 dS m-1. The 40% increase in recommended phosphorus dose promotes high iron and copper accumulations and, less sodium accumulation into tissues of cowpea shoot as influenced by saline stress. 60% reduction of the recommended dose of phosphate fertilizer increased the manganese and zinc accumulation of tissues of cowpea shoot under salt stress.

scholarly journals Effect of Hydrogen Peroxide in the Growth of Yellow Passion Fruit Seedlings Under Salinity Stress

2018 ◽  
Vol 10 (10) ◽  
pp. 151 ◽  
Author(s):  
Adriana da S. Santos ◽  
Railene H. C. R. Araújo ◽  
Reginaldo G. Nobre ◽  
Valéria F. de O. Sousa ◽  
Marília H. B. S. Rodrigues ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Salinity Stress ◽  
Irrigation Water ◽  
Block Design ◽  
Harmful Effect ◽  
Passion Fruit ◽  
Biotic And Abiotic Stress ◽  
Randomized Block Design ◽  
The One ◽  
Yellow Passion Fruit

Hydrogen peroxide (H2O2) is a molecule that can flag plants under biotic and abiotic stress conditions. Among the kinds of stress, the salinity stress is the one that most usually affects plants. Consequently, the purpose hereof was to use hydrogen peroxide (H2O2) to mitigate the possible harmful effects of salinity in yellow passion fruit seedlings. We employed a randomized block design, in a 5 × 3 factorial scheme, corresponding to five irrigation water electric conductivity levels (0.3; 1.3; 2.3; 3.3; and 4.3 dS m-1) and three hydrogen peroxide concentrations (0; 5; and 15 μmol L-1), with four repetitions. The treatments were applied foliarly 7 and 15 days after the seedlings’ germination with hand sprayers. Sixty days after sowing, we evaluated the seedlings’ growth and quality variables, which finally proved that hydrogen peroxide mitigates the harmful effect of the irrigation water’s salinity up to 2 dS m-1 in the growth of yellow passion fruit seedlings at the concentration of 5 μmol/L. Nonetheless, excessive concentrations (15 μmol L-1) associated with high salt concentrations were proven detrimental to the seedlings’ phenological growth and quality.

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