scholarly journals Tolerance of peanut (Arachis hypogea) genotypes to salt stress in the initial phase

2020 ◽  
Vol 24 (1) ◽  
pp. 37-43 ◽  
Author(s):  
Francisco V. da S. Sá ◽  
Manoel G. dos Santos ◽  
Aurélio P. Barros Júnior ◽  
José R. T. de Albuquerque ◽  
Almir R. E. de Souza ◽  
...  
Keyword(s):  
Salt Stress ◽  
Block Design ◽  
Biomass Accumulation ◽  
High Salinity Water ◽  
Arachis Hypogea ◽  
Randomized Block Design ◽  
Irrigation Water Salinity ◽  
Salinity Water ◽  
Tolerance To Salinity

ABSTRACT This study aimed to evaluate the emergence, growth, biomass accumulation and tolerance of peanut genotypes under salt stress. The experiment was conducted in a protected environment (greenhouse), evaluating six peanut genotypes (Tatuí, L7151, Caiapó, IAC8112, IAC881 and Havana), which were subjected to two levels of irrigation water salinity (0.5 [control] and 3.5 dS m-1), arranged in a 6 x 2 factorial scheme, in a randomized block design, with five repetitions, with two plants per plot. Plants were cultivated for 30 days after sowing in lysimeters with capacity for 0.5 dm3, filled with a mixture of non-saline, non-sodic soil and commercial substrate in 1:1 proportion on volume basis. During this period, plants were evaluated for emergence, growth, biomass accumulation, tolerance to salinity and dissimilarity. The genotypes Tatuí and L7151 are the most sensitive to salt stress in the emergence stage. Irrigation with high-salinity water reduced the growth and biomass accumulation of the peanut genotypes, and Caiapó and IAC8112 were the least affected. The classification of salinity tolerance had the following sequence: Caiapó > IAC8112 > Havana > Tatuí > IAC881 > L7151.

scholarly journals Photochemical efficiency of basil cultivars fertigated with salinized nutrient solutions

2020 ◽  
Vol 24 (5) ◽  
pp. 319-324
Author(s):  
Sandy T. dos Santos ◽  
Francisco de A. de Oliveira ◽  
Giordanio B. S. Oliveira ◽  
Francisco V. da S. Sá ◽  
Jessilanne P. B. de M. Costa ◽  
...  
Keyword(s):  
Salt Stress ◽  
Chlorophyll Fluorescence ◽  
Block Design ◽  
Photochemical Efficiency ◽  
Light Conditions ◽  
High Salinity Water ◽  
Randomized Block Design ◽  
Full Flowering ◽  
Salinity Water ◽  
Nutrient Solutions

ABSTRACT Reduction in plant growth under salt stress is due, among other factors, to changes in photochemical efficiency and, consequently, in photosynthesis. The objective of this study was to evaluate the effect of salt stress on the chlorophyll fluorescence variables in cultivars of basil (Ocimum basilicum L.). The experiment was conducted in a greenhouse, using a randomized block design in a 5 x 3 factorial scheme, corresponding to five basil cultivars (‘Grecco a Palla’, ‘Alfavaca Basilicão’, ‘Alfavaca Verde’, ‘Lemoncino’ and ‘Roxo’) and three salinity of the nutrient solution (2.0, 3.5 and 5.0 dS m-1), with three repetitions, and the experimental plot was represented by three pots containing 3.0 dm3 of coconut fiber. At the full flowering stage, plants were evaluated for chlorophyll fluorescence, when adapted to the dark, as well as under saturating light conditions. In general, there were changes in fluorescence variables only at salinity above 3.5 dS m-1. Fertigation using high-salinity water promotes strong changes in the chlorophyll a fluorescence of sensitive basil cultivars. The cultivars ‘Grecco a Palla’ and ‘Alfavaca Verde’ were little affected by the increase of salinity, being the most tolerant to salt stress. In the cultivars ‘Alfavaca Basilicão’, ‘Lemoncino’ and ‘Roxo’, chlorophyll fluorescence was strongly affected by salinity, being the most sensitive. The tolerance ranking based on chlorophyll fluorescence is: ‘Grecco a Palla’ = ‘Alfavaca Verde’ > ‘Alfavaca Basilicão’ > ‘Lemoncino’ > ‘Roxo’.

scholarly journals CALCIUM SILICATE AS SALT STRESS ATTENUATOR IN SEEDLINGS OF YELLOW PASSION FRUIT cv. BRS GA1

2020 ◽  
Vol 33 (2) ◽  
pp. 509-517
Author(s):  
TARSO MORENO ALVES DE SOUZA ◽  
VANDER MENDONÇA ◽  
FRANCISCO VANIES DA SILVA SÁ ◽  
MEDSON JANER DA SILVA ◽  
CAÍQUE SANTOS TOMÉ DOURADO
Keyword(s):  
Salt Stress ◽  
Calcium Silicate ◽  
Saline Water ◽  
Block Design ◽  
Biomass Accumulation ◽  
Passion Fruit ◽  
Experimental Unit ◽  
Randomized Block Design ◽  
Irrigation Water Salinity ◽  
Yellow Passion Fruit

ABSTRACT Salt stress causes losses in the yields of crops, especially those of great economic and social-food importance, such as passion fruit. The objective of this study was to evaluate the effects of fertilization with calcium silicate on the mitigation of salt stress in yellow passion fruit seedlings. The experiment was conducted in a protected environment, in a randomized block design, arranged in a 4 x 3 factorial scheme, referring to four concentrations of calcium silicate (0; 2.22; 4.44 and 6.66 g per plant) and three levels of irrigation water salinity - ECw (0.5; 1.7 and 4.0 dS m-1), with four replicates, considering five plants as experimental unit. BRS GA1 seedlings were produced in 0.5-dm3 containers filled with a mixture of soil, washed sand and aged bovine manure, in a ratio of 1:1:1 (v:v:v). Plants received calcium silicate applications according to the studied doses in three plots, at 30, 45 and 60 days after sowing. At 90 days after sowing, plants were evaluated for growth and biomass accumulation. The use of water with salinity of 4.0 dS m-1 restricted the growth and biomass accumulation of passion fruit seedlings. The use of calcium silicate at dose of 3.5 g per plant mitigates salt stress in seedlings of passion fruit cultivar BRS GA1 when irrigated with saline water.

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 Multivariate classification of cotton cultivars tolerant to salt stress

2022 ◽  
Vol 26 (4) ◽  
pp. 266-273
Author(s):  
Aline D. A. de L. Marcelino ◽  
Pedro D. Fernandes ◽  
Jean P. C. Ramos ◽  
Wellison F. Dutra ◽  
José J. V. Cavalcanti ◽  
...  
Keyword(s):  
Salt Stress ◽  
Saline Water ◽  
Block Design ◽  
Principal Component ◽  
Multivariate Methods ◽  
Randomized Block Design ◽  
Conductance Data ◽  
Cotton Genotypes ◽  
Univariate Analyses

ABSTRACT Two multivariate methods were adopted to classify salt-tolerant cotton genotypes based on their growth and physiological traits. The genotypes were cultivated in a greenhouse and subjected to 45 days of irrigation with saline water from the V4 phase onwards. Irrigation was performed with saline water with electrical conductivity (ECw) of 6.0 dS m-1. A factorial-randomized block design was adopted with nine cultivars, two treatments of ECw (0.6 as the control, and 6.0 dS m-1), and four replicates. Plants were evaluated for growth, gas exchange, and photosynthesis. The data were statistically analyzed using univariate and multivariate methods. For the latter, non-hierarchical (principal component, PC) and hierarchical (UPGMA) models were used for the classification of cultivars. Significant differences were found between cultivars based on univariate analyses, and the traits that differed statistically were used for multivariate analyses. Four groups were identified with the same composition in both the PC and UPGMA methods. Among them, one contained the cultivars BRS Seridó, BRS 286, FMT 705, and BRS Rubi, which were tolerant to salt stress imposed on the plants. Photosynthesis, transpiration, and stomatal conductance data were the main contributors to the classification of cultivars using the principal component method.

scholarly journals Tolerance of guava rootstocks under salt stress

2016 ◽  
Vol 20 (12) ◽  
pp. 1072-1077 ◽  
Author(s):  
Francisco V. da S. Sá ◽  
Reginaldo G. Nobre ◽  
Luderlândio de A. Silva ◽  
Rômulo C. L. Moreira ◽  
Emanoela P. de Paiva ◽  
...  
Keyword(s):  
Salt Stress ◽  
Irrigation Water ◽  
Block Design ◽  
Development Stage ◽  
Water Salinity ◽  
Initial Development ◽  
Randomized Block Design ◽  
Irrigation Water Salinity

ABSTRACT This study aimed to evaluate the tolerance of guava rootstocks under salt stress in the initial development stage. The experiment was conducted in a greenhouse in a randomized block design in a 5 x 3 factorial, consisting of five levels of irrigation water salinity (0.6, 1.2, 1.8, 2.4 and 3.0 dS m-1) and three guava rootstocks (‘Crioula’, ‘Paluma’ and ‘Ogawa’), with four replicates and four plants per replicate. Emergence, growth and phytomass accumulation were evaluated 30 days after sowing. Increased salinity restricts guava emergence, growth and phytomass accumulation, and the most drastic effects occur at levels higher than 1.8 dS m-1. The cultivar ‘Crioula’ is more tolerant to salinity in relation to ‘Paluma’ and ‘Ogawa’, and can be indicated as rootstock.

scholarly journals Exogenous application of phytohormones mitigates the effect of salt stress on Carica papaya plants

2020 ◽  
Vol 24 (3) ◽  
pp. 170-175
Author(s):  
Francisco V. da S. Sá ◽  
Marcos E. B. Brito ◽  
Luderlândio de A. Silva ◽  
Rômulo C. L. Moreira ◽  
Emanoela P. de Paiva ◽  
...  
Keyword(s):  
Salt Stress ◽  
Irrigation Water ◽  
Carica Papaya ◽  
Block Design ◽  
Experimental Unit ◽  
Exogenous Application ◽  
Survival Percentage ◽  
Randomized Block Design ◽  
Irrigation Water Salinity ◽  
Positive Effect

ABSTRACT The salinity has complex effects on the physiological, nutritional and hormonal interactions of plants. This study aimed to evaluate the mitigating action of exogenous application of different types and concentrations of phytohormones on Carica papaya under salt stress. The experiment was conducted in greenhouse, using a randomized block design with treatments formed from a 2 x 3 x 5 factorial scheme, relative to two concentrations of salts in the irrigation water (0.6 and 2.4 dS m-1), three types of phytohormones [Auxin = indole-3-acetic acid; Cytokinin = CPPU (N-(2-chloro-pyridyl)-N-phenylurea) and Gibberellin = gibberellic acid(AG3)], and five concentrations of the phytohormone (0, 12.5, 25.0, 37.5 and 50.0 µM L-1), with three repetitions, totaling 90 plots, and the experimental unit consisted of six plants. C. papaya cv. ‘Sunrise Solo’ was grown on polyethylene trays of 162 cells, with capacity for 50 mL. The plants were evaluated for survival percentage and phytomass accumulation until 25 days after sowing. Increase in irrigation water salinity has deleterious effects on C. papaya plants regardless of the application of phytohormones. Exogenous application of gibberellin has a positive effect in mitigating salt stress on C. papaya plants, greater than the effects of auxins and cytokinins. Exogenous application of gibberellin and auxin at concentration of 37.5 µM L-1 mitigates the effects of salinity on C. papaya plants. Exogenous application of cytokinin at concentrations of 12.5 to 50.0 µM L-1 is not viable for C. papaya plants.

scholarly journals PRODUCTION CHARACTERISTICS OF SESAME GENOTYPES UNDER DIFFERENT STRATEGIES OF SALINE WATER APPLICATION

2020 ◽  
Vol 33 (2) ◽  
pp. 490-499
Author(s):  
GEOVANI SOARES DE LIMA ◽  
CASSIANO NOGUEIRA DE LACERDA ◽  
LAURIANE ALMEIDA DOS ANJOS SOARES ◽  
HANS RAJ GHEYI ◽  
RAILENE HÉRICA CARLOS ROCHA ARAÚJO
Keyword(s):  
High Salinity ◽  
Saline Water ◽  
Block Design ◽  
Limiting Factor ◽  
High Salinity Water ◽  
Low Salinity ◽  
Randomized Block Design ◽  
Salinity Water ◽  
Sesame Genotypes ◽  
Total Seed

ABSTRACT In semiarid areas, the scarcity of water with low salt concentration associated with irregular precipitation becomes a limiting factor to ensure agricultural production. In this context, the objective of this study was to evaluate the growth and production of sesame genotypes under different strategies of use of saline water. The experiment was conducted under protected environment conditions, using a randomized block design in a 6 x 2 factorial scheme, and the treatments consisted of six strategies for the use of saline water in the different stages of plant development (SE = irrigation with low-salinity water throughout the cultivation cycle; VE, FL, FR, VE/FL and VE/FR - respectively, irrigation with high-salinity water at the vegetative stage, flowering, fruiting, vegetative/flowering and vegetative/fruiting) and two sesame genotypes (BRS Seda and BRS Anahí), with 4 replicates. Irrigation with high-salinity water (ECw = 2.7 dS m-1) during the vegetative, flowering and fruiting stages did not compromise sesame production. There were reductions in sesame growth when irrigation with high-salinity water was continuously applied at the vegetative/flowering stages and in sesame production when it was applied during the vegetative/flowering and vegetative/fruiting stages. The greater growth of BRS Seda sesame plants resulted in an increase in the total number of fruits and in the total seed weight.

scholarly journals Cekaman Garam NaCl danTeknik Aplikasi Azolla pada Tanaman Padi

2020 ◽  
Vol 25 (3) ◽  
pp. 349-355
Author(s):  
Fitri Krismiratsih ◽  
Sugeng Winarso ◽  
Slamerto Slamerto
Keyword(s):  
Salt Stress ◽  
Block Design ◽  
Ground Cover ◽  
Dry Weight ◽  
Soil Conditions ◽  
Application Technique ◽  
Rice Plants ◽  
Root Dry Weight ◽  
Randomized Block Design ◽  
Salinity Levels

Efforts to increase production potential can be carried out by extensification in a less productive saline land. Salinity is a major problem in the growth of most plants. Azolla is a plant that is sensitive to salinity, but if it is applied well, it can grow optimally at high salinity levels. The purpose of this study is to obtain an azolla application technique that is effective in increasing the adaptation of rice plants to NaCl saline soil conditions. The experimental design used was Randomized Block Design (RBD) with 2 factors and 3 replications. The first factor was the azolla application technique consisted of 3 levels: fresh azolla composted, fresh azolla immersed, and fresh azolla as a ground cover. The second factor was the levels of NaCl salt stress consisted of 4 levels: control DHL 0, 2, 4, and 8 dS m-1. The adaptation ability of rice plants based on variable plants height growth rate, number of tillers, strove dry weight, root dry weight, stomata density, leaf chlorophyll (SPAD), age of flowering, number of paddy grain, and harvest index. The results showed how to test content up to 2 dS m-1 which increased rice growth especially the application of azolla composted. Increasing stress to 4 and 8 dS m-1showed bad effects on vegetative, physiology, and yields of rice components. The stronger of salt stress the higher all plants growth variables except the age of flowering that actually showed the acceleration of flowering. Application of composted azolla can increase the root dry weight and azolla as a ground cover can increase the numbers of paddy grains.   Keywords: azolla, NaCl, rice, stress

scholarly journals Organic fertilization to attenuate water salinity effect on papaya growth

2019 ◽  
Vol 23 (2) ◽  
pp. 79-83
Author(s):  
Mônica S. da S. Sousa ◽  
Vera L. A. de Lima ◽  
Marcos E. B. Brito ◽  
Luderlândio de A. Silva ◽  
Rômulo C. L. Moreira ◽  
...  
Keyword(s):  
Irrigation Water ◽  
Saline Water ◽  
Block Design ◽  
Fruit Trees ◽  
Water Salinity ◽  
Organic Fertilization ◽  
Randomized Block Design ◽  
Irrigation Water Salinity ◽  
Set Up ◽  
Management Alternatives

ABSTRACT The salinity of water and soil reduces the growth and production of crops, especially the fruit trees, such as papaya. Thus, it is necessary to obtain management alternatives for cultivation under these conditions. Therefore, the objective of this study was to evaluate the growth and phytomass of papaya cultivated under irrigation with saline water and organic fertilization. An experiment was set up using a randomized block design, with the treatments distributed in a 5 x 2 factorial scheme, consisting of five levels of salinity of irrigation water (0.6, 1.2, 1.8, 2.4 and 3.0 dS m-1) and two levels of organic fertilization (10 and 20 L of bovine manure per plant), with three replications, totaling thirty experimental plots. Growth variables of papaya were evaluated. Papaya plants were negatively affected by irrigation water salinity, with a greater effect on the number of leaves and on dry phytomass of leaves, with no effect of bovine manure levels.

scholarly journals Morphophysiology of guava under saline water irrigation and nitrogen fertilization

2018 ◽  
Vol 22 (1) ◽  
pp. 32-37 ◽  
Author(s):  
Idelfonso L. Bezerra ◽  
Reginaldo G. Nobre ◽  
Hans R. Gheyi ◽  
Leandro de P. Souza ◽  
Francisco W. A. Pinheiro ◽  
...  
Keyword(s):  
Leaf Area ◽  
Irrigation Water ◽  
Saline Water ◽  
Block Design ◽  
N Fertilization ◽  
Water Salinity ◽  
Randomized Block Design ◽  
Irrigation Water Salinity ◽  
N Dose ◽  
Number Of Leaves

ABSTRACT The aim of this study was to evaluate the growth of grafted guava cv. ‘Paluma’ subjected to different concentrations of salts in irrigation water and nitrogen (N) fertilization. The plants were transplanted to 150 L lysimeters and under field conditions at the Science and Agri-food Technology Center of the Federal University of Campina Grande, in the municipality of Pombal - PB. The experiment was conducted in randomized block design in a 5 x 4 factorial scheme, with three replicates, and the treatments corresponded to five levels of electrical conductivity of irrigation water - ECw (0.3; 1.1; 1.9; 2.7 and 3.5 dS m-1) and four N doses (70, 100, 130 and 160% of the N dose recommended for the crop). The doses equivalent to 100% corresponded to 541.1 mg of N dm-3 of soil. Irrigation water salinity above 0.3 dS m-1 negatively affects the number of leaves, leaf area, stem diameter, dry phytomass of leaves, branches and shoots . A significant interaction between irrigation water salinity and N fertilization was observed only for the number of leaves and leaf area at 120 days after transplanting. N dose above 70% of the recommendation (378.7 mg N dm-3 soil) did not mitigate the deleterious effects caused by salt stress on plant growth.

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