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.

scholarly journals Hydrogen peroxide in the acclimation of yellow passion fruit seedlings to salt stress

2021 ◽  
Vol 25 (2) ◽  
pp. 116-123
Author(s):  
André A. R. da Silva ◽  
Luana L. de S. A. Veloso ◽  
Geovani S. de Lima ◽  
Carlos A. V. de Azevedo ◽  
Hans R. Gheyi ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Hydrogen Peroxide ◽  
Salt Stress ◽  
Irrigation Water ◽  
Block Design ◽  
Co2 Assimilation ◽  
Passion Fruit ◽  
Randomized Block Design ◽  
Four Levels ◽  
Yellow Passion Fruit

ABSTRACT The objective of the present study was to evaluate the effect of exogenous application of hydrogen peroxide on the emergence, growth and gas exchange of yellow passion fruit seedlings subjected to salt stress. The experiment was conducted in pots (Citropote®) under greenhouse conditions, in the municipality of Campina Grande, PB, Brazil. Treatments were distributed in a randomized block design, in a 4 x 4 factorial arrangement, with four levels of electrical conductivity of irrigation water (0.7, 1.4, 2.1 and 2.8 dS m-1) associated with four concentrations of hydrogen peroxide (0, 25, 50 and 75 μM), with four replicates and two plants per plot. Irrigation using water with electrical conductivity above 0.7 dS m-1 negatively affects the emergence and growth of passion fruit. Hydrogen peroxide concentrations between 10 and 30 μM induce the acclimation of passion fruit plants to salt stress, mitigating the deleterious effects of salinity on the relative growth rate in stem diameter and leaf area, stomatal conductance, transpiration, CO2 assimilation rate and instantaneous carboxylation efficiency. Irrigation water salinity combined with hydrogen peroxide concentrations above 30 μM causes reduction in passion fruit growth and physiology.

scholarly journals Growth and quality of soursop (Annona muricata, L.) seedlings under saline stress and hydrogen peroxide (H2O2)

2017 ◽  
pp. 1643-1649
Author(s):  
André Alisson Rodrigues da Silva ◽  
Luana Lucas de Sá Almeida Veloso ◽  
Geovani Soares de Lima ◽  
Carlos Alberto Vieira de Azevedo ◽  
Hans Raj Gheyi ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Hydrogen Peroxide ◽  
Irrigation Water ◽  
Saline Water ◽  
Saline Stress ◽  
Annona Muricata ◽  
Relative Growth ◽  
Saline Water Irrigation ◽  
Sensitive Variable

This study aimed to evaluate growth and quality of soursop seedlings cv. Morada Nova, as a function of saline water irrigation and exogenous applications of hydrogen peroxide (H2O2), under greenhouse conditions. The experimental design used was randomized blocks in 5 x 5 factorial scheme, corresponding to the combination of five levels of irrigation water electrical conductivity – ECw (0.7, 1.4, 2.1, 2.8 and 3.5 dS m-1) and five concentrations of hydrogen peroxide (0, 25, 50, 75 and 100 µM). The results showed that Hydrogen peroxide concentrations were applied by soaking the seed for 24 h and by spraying on all leaves of soursop seedlings. Irrigation water above electrical conductivity of 0.7 dS m-1 negatively affected growth and quality of soursop seedlings cv. Morada Nova. The dry phytomass of root was the most sensitive variable to saline stress. Hydrogen peroxide concentrations of 31 and 100 µM led to highest relative growth rate in leaf area and dry phytomass of leaves and stem, respectively. The quality of soursop seedlings cv. Morada Nova was not compromised by using water with electrical conductivity of 3.5 dS m-1 in irrigation.

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 exchanges and growth of passion fruit under saline water irrigation and H2O2 application

2019 ◽  
Vol 23 (12) ◽  
pp. 945-951 ◽  
Author(s):  
Elysson M. G. Andrade ◽  
Geovani S. de Lima ◽  
Vera L. A. de Lima ◽  
Saulo S. da Silva ◽  
Hans R. Gheyi ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Irrigation Water ◽  
Saline Water ◽  
Co2 Assimilation ◽  
Passion Fruit ◽  
Water Salinity ◽  
Gas Exchanges ◽  
Irrigation Water Salinity ◽  
Number Of Leaves ◽  
Yellow Passion Fruit

ABSTRACT The study was carried out to evaluate the photosynthetic efficiency and growth of yellow passion fruit, cultivated under different levels of irrigation water salinity and exogenous application of hydrogen peroxide. The experiment was carried out in greenhouse of the Universidade Federal de Campina Grande, PB, Brazil, using drainage lysimeters with capacity for 100 dm3, filled with Entisol of sandy texture. The experimental design was randomized blocks using a 4 x 4 factorial scheme, with three repetitions, corresponding to four water salinity (0.7; 1.4; 2.1 and 2.8 dS m-1) and four concentrations of hydrogen peroxide (0, 20, 40 and 60 µM). The different concentrations of hydrogen peroxide were applied by soaking the seed for a period of 24 h and spraying the leaves on the adaxial and abaxial sides. At 35 days after transplanting, the interaction between water salinity and hydrogen peroxide concentrations did not significantly interfere with plant physiology and growth, except for the number of leaves. The hydrogen peroxide did not cause significant effects on any of the evaluated plant variables. Increasing salinity of irrigation water led to reduction in gas exchanges at 61 and 96 days after transplanting. Water salinity inhibited the CO2 assimilation, transpiration, stomatal conductance, instantaneous carboxylation efficiency and stem diameter of passion fruit plants.

scholarly journals Allometry and morphophysiology of papaya seedlings in a substrate with polymer under irrigation with saline water

2020 ◽  
Vol 11 ◽  
pp. e3339
Author(s):  
EXPEDITO CAVALCANTE NASCIMENTO NETO ◽  
Francisco Thiago Coelho Bezerra ◽  
Marlene Alexandrina Ferreira Bezerra ◽  
Walter Esfrain Pereira ◽  
Lourival Ferreira Cavalcante ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Leaf Area ◽  
Irrigation Water ◽  
Saline Water ◽  
Block Design ◽  
Dry Mass ◽  
Area Ratio ◽  
Irrigation Frequency ◽  
Randomized Block Design ◽  
Blade Area

The availability and quality of the irrigation water are among the limitations for the development of agriculture in the semiarid. Aiming at gathering information on these limitations, this work aimed to evaluate the association between a water-absorbing polymer and water salinity in irrigation frequencies, as well as container volumes on the allometric and morphophysiological indices of seedlings of the papaya (Carica papaya) cultivar ‘Sunrise Solo’. The treatments were obtained from the combination between the water-absorbing polymer (0.0; 0.2; 0.6; 1.0, and; 1.2 g dm-3), the electrical conductivity of the irrigation water (0.3; 1.1; 2.7; 4.3, and; 5.0 dS m-1), and irrigation frequencies (daily and alternate), plus two additional treatments (0.75 and 1.30 dm3) to study the effects of the container volume, distributed in a randomized block design. At 55 days after sowing, the following characteristics were evaluated: ratio between stem height and diameter; ratio between shoot and root dry matter; root density; leaf blade area; ratio between total leaf area and root dry mass; specific leaf area; leaf area ratio; leaf mass ratio; and Dickson quality index. The allometric and morphophysiological indices were damaged by the increase of water electrical conductivity and favored by the application of the polymer and a higher irrigation frequency. In the production of papaya seedlings, a daily irrigation frequency must be prioritized, using containers of 0.75 or 1.30 dm-3, water with electrical conductivity up to 2.6 and 1.9 dS m-1 when irrigated daily or in alternate days, respectively, and 0.6 g dm-3 of polymer.

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.

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

2017 ◽  
Vol 9 (10) ◽  
pp. 168 ◽  
Author(s):  
Francisco V. da S. Sá ◽  
Hans R. Gheyi ◽  
Geovani S. de Lima ◽  
Emanoela P. de Paiva ◽  
Pedro D. Fernandes ◽  
...  
Keyword(s):  
Chlorophyll A ◽  
Water Relations ◽  
Irrigation Water ◽  
Chlorophyll A Fluorescence ◽  
Saline Water ◽  
Block Design ◽  
West Indian ◽  
N Fertilization ◽  
Nitrogen And Phosphorus ◽  
Gas Exchanges

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-1. The combined action of N and P, at doses of 140:140% N/P recommendation, increases leaf turgor in the plants, regardless of the ECw level. The increment of 40% in N dose reduces the effects of salinity on the initial fluorescence of chlorophyll a in West Indian cherry irrigated with up to 2.2 dS m-1.

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.

scholarly journals Production of Pityrocarpa moniliformis (Benth.) Luckow & R.W. Jobson (Fabaceae) seedlings irrigated with saline water

2021 ◽  
Vol 25 (3) ◽  
pp. 182-188
Author(s):  
Adriana dos S. Ferreira ◽  
Caio C. P. Leal ◽  
Bruno da S. Guirra ◽  
Salvador B. Torres ◽  
Marco Porceddu ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Irrigation Water ◽  
Saline Water ◽  
Block Design ◽  
Soluble Sugars ◽  
Dry Mass ◽  
Initial Growth ◽  
Saline Irrigation ◽  
Total Soluble Sugars ◽  
Chlorophylls A And B

ABSTRACT Saline irrigation water at high levels causes disturbance in the growth of more sensitive plants. The objective of this research was to evaluate the initial growth of Pityrocarpa moniliformis seedlings under different electrical conductivity in irrigation water through physiological and biochemical analyses. The experiment was conducted in a greenhouse with five water electrical conductivities (0.5, 2.0, 4.0, 6.0 and 8.0 dS m-1) and four repetitions of 20 plants each, arranged in a randomized block design. Application of the treatments with irrigation water containing NaCl began at 30 days after sowing. To determine the behaviour of the species, the following variables were analysed: stem diameter, plant height, number of leaves, leaf area, Dickson quality index, shoot dry mass, root dry mass and total dry mass, as well as the biochemical variables, such as the concentrations of total soluble sugars, free proline and chlorophylls a and b. The increase in irrigation water salinity hampered the growth of P. moniliformis seedlings, with electrical conductivity of 0.5 dS m-1 being the limit for maximum production. The results also indicated that the deleterious effects of salt stress on P. moniliformis seedlings variables increase in concentrations of proline, total soluble sugars and betaine glycine.

scholarly journals Phytomass and quality of yellow passion fruit seedlings under salt stress and silicon fertilization

2020 ◽  
Vol 11 ◽  
pp. e3400
Author(s):  
Genilson Lima Diniz ◽  
Reginaldo Gomes Nobre ◽  
Geovani Soares de Lima ◽  
Leandro de Pádua Souza ◽  
Lauriane Almeida dos Anjos Soares ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Salt Stress ◽  
Block Design ◽  
Passion Fruit ◽  
Northeastern Brazil ◽  
Shoot Ratio ◽  
Root Shoot Ratio ◽  
Silicon Fertilization ◽  
Plant Nursery

The semiarid region of Northeastern Brazil is characterized by long drought periods, and the use of saline waters appears as an alternative for the expansion of irrigated areas. Associated with the use of these waters, silicon fertilization constitutes an important attenuator of salt stress. In this perspective, this study aimed to evaluate the phytomass production and quality of the passion fruit cultivar ‘Gigante Amarelo’ grown with saline water and silicon fertilization. The experiment was conducted in a plant nursery belonging to the Center of Agrifood Science and Technology, in the municipality of Pombal-PB. A completely randomized block design in a 5 x 5 factorial scheme was used, referring to five levels of electrical conductivity of the irrigation water (0.3, 1.0, 1.7, 2.4, and 3.1 dS m-1) and five doses of silicon fertilization (0; 25; 50; 75, and 100 g of potassium silicate/plant), with four replications and two plants per plot. The phytomass accumulation (leaves, stem, and roots), as well as the total dry phytomass, shoot dry phytomass, root/shoot ratio, and the quality index of Dickson were evaluated. The data obtained were subjected to the F-test at 0.01 and 0.05 level of probability. The electrical conductivity of water from 0.3 dS m-1 caused the decrease of phytomass production in seedlings of the passion fruit cultivar ‘Gigante Amarelo’, although it is possible to produce good quality passion fruit seedlings with water salinity up to 3.1 dS m-1. The doses of silicon fertilization mitigated the effect of salt stress on the root/shoot ratio of plants of the passion fruit cultivar ‘Gigante Amarelo’.

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