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 Efeito da adubação nitrogenada na formação de mudas de goiabeira irrigadas com águas salinizadas

2015 ◽  
Vol 10 (4) ◽  
pp. 42 ◽  
Author(s):  
E. M. Silva ◽  
R. G. Nobre ◽  
L. P. Souza ◽  
F. W. A. Pinheiro ◽  
A. B. A. Andrade
Keyword(s):  
Electrical Conductivity ◽  
Leaf Area ◽  
Plant Height ◽  
Irrigation Water ◽  
Nitrogen Fertilization ◽  
Block Design ◽  
Dry Mass ◽  
Experimental Unit ◽  
Randomized Block Design ◽  
Irrigation Water Salinity

<p>Além de favorecer o desenvolvimento e a produção das culturas, a adubação tem sido considerada uma técnica capaz de reduzir o efeito da salinidade nas plantas. Neste sentido, desenvolveu-se o trabalho<strong> </strong>para avaliar a influência de doses de nitrogênio na formação de mudas de goiabeira cv. Paluma irrigadas com águas de diferentes salinidades. O experimento foi desenvolvido em casa de vegetação do Centro de Ciências e Tecnologia Agroalimetar da UFCG, Pombal, PB com delineamento experimental em blocos casualizados, em esquema fatorial 5 x 4, sendo os tratamentos correspondentes aos níveis de condutividade elétrica da água (CEa) de 0,3; 1,1; 1,9; 2,7 e 3,5 dS m<sup>-1</sup> associados a 70, 100, 130 e 160% da dose recomendada de nitrogênio (N) para mudas de goiabeira cv. Paluma, com quatro repetições, e cinco plantas por unidade experimental. Aos 180 dias após a emergência, a adubação nitrogenada na dose de 773 mg de N dm<sup>-3</sup> reduz o efeito da salinidade da água de irrigação sobre o diâmetro do caule das mudas. As plantas adubadas com as doses variando de 541 a 618,4 mg de N dm<sup>-3</sup> atingem maior crescimento em altura de planta, número de folhas e área foliar. A área foliar e a massa seca total de mudas de goiabeira atingem maiores valores no nível de CEa de 1,3 dS m<sup>-1</sup>.</p><p align="center"><strong>Effect of nitrogen fertilization in the formation of guava seedlings irrigated with salted water</strong></p><p><strong>Abstract</strong><strong>: </strong>In addition to favoring the development and production of crops, the fertilizer has been considered a technique capable to reduce the effect of salinity on plants. The experiment was conducted in a greenhouse of the ‘Centro de Ciências e Tecnologia Agroalimentar’ of UFCG, Pombal, PB in a randomized block design a 5 x 4 factorial, with the treatments corresponding to the electrical conductivity of irrigation water (ECw) 0.3; 1.1; 1.9; 2.7 and 3.5 dS m<sup>-1</sup> associated with doses of 70, 100, 130 and 160% of recommended nitrogen (N) for guava seedlings Paluma,  with four replications, using five plants per experimental unit. At 180 days after emergence, the nitrogen fertilization at a dose of 773 mg N dm<sup>-3</sup> reduces the effect of irrigation water salinity on the stem diameter of seedlings. The plants fertilized with doses ranging from 541 at 618.4 mg of the N dm<sup>-3</sup> reach higher growth in plant height, leaf number and leaf area. The leaf area and total dry mass of guava seedlings reach higher values at the ECw level of 1.3 dS m<sup>-1</sup>.</p>

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 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 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 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 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.

scholarly journals EMERGENCE, GROWTH, AND PRODUCTION OF COLORED COTTON SUBJECTED TO SALT STRESS AND ORGANIC FERTILIZATION

2018 ◽  
Vol 31 (3) ◽  
pp. 719-729 ◽  
Author(s):  
LEANDRO DE PÁDUA SOUZA ◽  
GEOVANI SOARES DE LIMA ◽  
HANS RAJ GHEYI ◽  
REGINALDO GOMES NOBRE ◽  
LAURIANE ALMEIDA DOS ANJOS SOARES
Keyword(s):  
Organic Matter ◽  
Irrigation Water ◽  
Seed Weight ◽  
Sandy Loam ◽  
Block Design ◽  
Water Salinity ◽  
Randomized Block Design ◽  
Irrigation Water Salinity ◽  
Colored Cotton ◽  
Four Levels

ABSTRACT The semi-arid region of Northeast Brazil is vulnerable to problems of water scarcity and salinity, resulting in low-quality irrigation water and the need to adopt cultivation strategies that make the production system viable. Given the above, this study aimed to evaluate emergence, growth, and production of colored cotton subjected to increasing levels of irrigation water salinity and organic matter doses. The experiment was carried out in a eutrophic Regolithic Neosol with a sandy loam texture in a greenhouse in the municipality of Campina Grande - PB, Brazil. A randomized block design was used in a 4 x 4 factorial scheme with three replicates, and the treatments corresponded to four levels of electrical conductivity of water - ECw (1.7, 3.4, 5.1, and 6.8 dS m-1) and four doses of organic matter - OM (0, 2.5, 3.5, and 4.5% based on soil volume). Increasing irrigation water salinity with ECw values above 1.7 dS m-1 reduced emergence, growth, and production of colored cotton, and the cotton seed weight was the variable most affected by salinity. Organic matter addition led to increased cotton growth and production, especially in terms of seed weight. Increasing doses of organic matter attenuated the effect of irrigation water salinity on the number of bolls in ‘BRS Jady’ cotton.

scholarly journals Salt stress and exogenous application of hydrogen peroxide on photosynthetic parameters of soursop

2019 ◽  
Vol 23 (4) ◽  
pp. 257-263 ◽  
Author(s):  
André A. R. da Silva ◽  
Geovani S. de Lima ◽  
Carlos A. V. de Azevedo ◽  
Luana L. de S. A. Veloso ◽  
Hans R. Gheyi ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Salt Stress ◽  
Irrigation Water ◽  
Sandy Loam ◽  
Block Design ◽  
Co2 Concentration ◽  
Co2 Assimilation ◽  
Carboxylation Efficiency ◽  
Photosynthetic Parameters ◽  
Exogenous Application

ABSTRACT This study aimed to evaluate the gas exchanges and photosynthetic pigments of soursop seedlings cv. ‘Morada Nova’ irrigated with saline waters and subjected to exogenous application of hydrogen peroxide by seed soaking and foliar spraying. The study was carried out using plastic bags under greenhouse conditions at the Center of Technology and Natural Resources of the Federal University of Campina Grande, PB, Brazil, using a eutrophic Regolithic Neosol of sandy loam texture. Treatments were arranged in a randomized block design, in 5 x 5 factorial scheme, which consisted of five levels of electrical conductivity – ECw (0.7; 1.4; 2.1; 2.8 and 3.5 dS m-1) of irrigation water and five concentrations of hydrogen peroxide - H2O2 (0, 25, 50, 75 and 100 µM), with four replicates and three plants per plot. As the salt stress increased, there were reductions in internal CO2 concentration, instantaneous carboxylation efficiency and water use efficiency, and instantaneous carboxylation efficiency was the most sensitive variable. Hydrogen peroxide at concentrations of 25 and 50 µM attenuated the deleterious effects of water salinity on stomatal conductance, CO2 assimilation rate and chlorophyll a content, and the concentration of 25 µM was the most efficient. The content of chlorophyll b and carotenoids of soursop cv. ‘Morada Nova’ had the deleterious effects caused by the salinity of irrigation water mitigated by the exogenous application of hydrogen peroxide in the concentration of 25 μM.

scholarly journals Study on Exogenous Application of Organics for Alleviating Salt Stress in Sorghum Crop

2021 ◽  
pp. 177-180
Author(s):  
K. Anny Mrudhula ◽  
Y. Sudha Rani ◽  
P. Venkata Subbaiah ◽  
A. Sambaiah
Keyword(s):  
Ascorbic Acid ◽  
Salt Stress ◽  
Humic Acid ◽  
Developmental Stages ◽  
Block Design ◽  
Crop Growth ◽  
Yield Attributes ◽  
Exogenous Application ◽  
Combined Application ◽  
Randomized Block Design

Abiotic stresses soil salinity is one of the major restricting the use of land for agriculture because it limits the crop growth and development. In these stressful conditions, improving productivity is important challenge because salinity has different effects on crop growth and developmental stages in different crops. Exogenous application of proline, humic acid and ascorbic acid has improved salt stress tolerance in various plant species. An experiment was conducted in farmer’s field at Raparla village, Battiprolu mandal during spring season, 2018 and 2019 to evaluate the effect of exogenous application of organics for alleviating salt stress on sorghum crop. The experiment was conducted in randomized block design with five treatments which replicated four times. Five treatments in this study were applied as follows: (T1) control i.e farmer’s practice; (T2) proline application at 0.6 g/L; (T3) ascorbic acid application at 0.2 g/L; (T4) humic acid application at 2 g/L; (T5) Combination of T1, T2, T3 and T4. The Results showed that all treatments (T2, T3 T4 and T5) effected on the yield characteristic and yield (kg/ha). The highest yield attributes and yield of sorghum crop (3460 and 3240 kg/ha) was significantly recorded by T5 (the combined application of proline + ascorbic acid + humic acid) followed by T2 (alone proline application).

scholarly journals Physiological indices and growth of ‘Gigante Amarelo’ passion fruit under salt stress and silicate fertilization

2020 ◽  
Vol 24 (12) ◽  
pp. 814-821
Author(s):  
Genilson L. Diniz ◽  
Reginaldo G. Nobre ◽  
Geovani S. de Lima ◽  
Leandro de P. Souza ◽  
Hans R. Gheyi ◽  
...  
Keyword(s):  
Salt Stress ◽  
Irrigation Water ◽  
Saline Water ◽  
Block Design ◽  
Co2 Assimilation ◽  
Stem Diameter ◽  
Passion Fruit ◽  
Physiological Indices ◽  
Randomized Block Design ◽  
Fruit Plants

ABSTRACT Abiotic stresses are responsible for the loss of agricultural production in different regions, especially in semiarid regions, which have long periods of drought and high evapotranspiration, leading to the use of saline water as an alternative for the expansion of irrigated areas. In this context, the objective was to evaluate the physiological indices and the growth of the ‘Gigante Amarelo’ passion fruit as a function of the salinity of irrigation water and fertilization with silicon. A randomized block design was used in a 5 x 2 factorial scheme, whose treatments consisted of five electrical conductivities of irrigation water - ECw (0.3; 1.0; 1.7, 2.4 and 3.1 dS m-1) associated with two doses of silicion (150 and 300 g of silicon plant-1) with four repetitions. Salt stress causes changes in gas exchange, chlorophyll a and b synthesis and growth of ‘Gigante Amarelo’ passion fruit plants, 60 days after transplanting. Fertilization with silicon dose of 300 g plant-1 promotes increments in CO2 assimilation rate and instantaneous water use efficiency, being able to mitigate the deleterious effects of salinity. Passion fruit plants fertilized with silicon dose of 300 g plant-1 attained greater growth in stem diameter and relative growth rate in stem diameter, from 30 to 60 days after transplanting.

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