scholarly journals Biogenic copper nanoparticles produced by using the Klebsiella pneumoniae strain NST2 curtailed salt stress effects in maize by modulating the cellular oxidative repair mechanisms

2021 ◽  
Vol 217 ◽  
pp. 112264
Author(s):  
Muhammad Noman ◽  
Temoor Ahmed ◽  
Muhammad Shahid ◽  
Muhammad Bilal Khan Niazi ◽  
Muhammad Qasim ◽  
...  
Keyword(s):  
Salt Stress ◽  
Klebsiella Pneumoniae ◽  
Copper Nanoparticles ◽  
Stress Effects ◽  
Repair Mechanisms

scholarly journals Ethylene Supplementation Combined with Split Application of Nitrogen and Sulfur Protects Salt-Inhibited Photosynthesis through Optimization of Proline Metabolism and Antioxidant System in Mustard (Brassica juncea L.)

Plants ◽  
2021 ◽  
Vol 10 (7) ◽  
pp. 1303
Author(s):  
Badar Jahan ◽  
Noushina Iqbal ◽  
Mehar Fatma ◽  
Zebus Sehar ◽  
Asim Masood ◽  
...  
Keyword(s):  
Salt Stress ◽  
Brassica Juncea ◽  
Antioxidant System ◽  
Photosynthetic Efficiency ◽  
Growth Potential ◽  
Proline Metabolism ◽  
Sowing Time ◽  
Stress Effects ◽  
Nutrient Assimilation ◽  
S Application

In the present study, the potential of ethylene as ethephon (an ethylene source) was investigated individually and in combination with split doses of nitrogen (N) and sulfur (S) soil treatments for removal of the damaging effects of salt stress (100 mM NaCl) in mustard (Brassica juncea L.). Plants were grown with 50 mg N plus 50 mg S kg−1 soil at sowing time and an equivalent dose at 20 days after sowing [N50 + S50]0d and 20d. Ethephon at 200 μL L‒1 was applied to combined split doses of N and S with or without NaCl. Plants subjected to NaCl showed a decrease in growth and photosynthetic characteristics as well as N and S assimilation, whereas proline metabolism and antioxidants increased. The application of ethephon to plants grown with split N and S doses significantly enhanced photosynthetic efficiency by increasing the assimilation of N and S, improving the concentration of proline and induction of the antioxidant system with or without NaCl. The regulation of ethylene and/or split forms of N and S application may be potential tools for not just overcoming salt stress effects in this species and in related Brassicaceae but also enhancing their photosynthesis and growth potential through increased nutrient assimilation.

scholarly journals Chitosan-PVA and Copper Nanoparticles Improve Growth and Overexpress the SOD and JA Genes in Tomato Plants under Salt Stress

Agronomy ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 175 ◽  
Author(s):  
Hipólito Hernández-Hernández ◽  
Antonio Juárez-Maldonado ◽  
Adalberto Benavides-Mendoza ◽  
Hortensia Ortega-Ortiz ◽  
Gregorio Cadenas-Pliego ◽  
...  
Keyword(s):  
Reactive Oxygen Species ◽  
Salt Stress ◽  
Copper Nanoparticles ◽  
Signaling Cascades ◽  
Saline Stress ◽  
Oxygen Species ◽  
Tomato Plants ◽  
Solanum Lycopersicum L ◽  
Ionic Stress ◽  
Cellular Detoxification

Saline stress severely affects the growth and productivity of plants. The activation of hormonal signaling cascades and reactive oxygen species (ROS) in response to salt stress are important for cellular detoxification. Jasmonic acid (JA) and the enzyme SOD (superoxide dismutase), are well recognized markers of salt stress in plants. In this study, the application of chitosan-polyvinyl alcohol hydrogels (Cs-PVA) and copper nanoparticles (Cu NPs) on the growth and expression of defense genes in tomato plants under salt stress was evaluated. Our results demonstrate that Cs-PVA and Cs-PVA + Cu NPs enhance plant growth and also promote the expression of JA and SOD genes in tomato (Solanum lycopersicum L.), under salt stress. We propose that Cs-PVA and Cs-PVA + Cu NPs mitigate saline stress through the regulation of oxidative and ionic stress.

scholarly journals Effect of UV Radiation and Salt Stress on the Accumulation of Economically Relevant Secondary Metabolites in Bell Pepper Plants

Agronomy ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 142 ◽  
Author(s):  
Jan Ellenberger ◽  
Nils Siefen ◽  
Priska Krefting ◽  
Jan-Bernd Schulze Lutum ◽  
Daniel Pfarr ◽  
...  
Keyword(s):  
Salt Stress ◽  
Secondary Metabolites ◽  
Negative Impact ◽  
Stress Conditions ◽  
Bell Pepper ◽  
Plant Performance ◽  
Production Cycle ◽  
Stress Effects ◽  
Leaf Level ◽  
Uv Stress

The green biomass of horticultural plants contains valuable secondary metabolites (SM), which can potentially be extracted and sold. When exposed to stress, plants accumulate higher amounts of these SMs, making the extraction and commercialization even more attractive. We evaluated the potential for accumulating the flavones cynaroside and graveobioside A in leaves of two bell pepper cultivars (Mavras and Stayer) when exposed to salt stress (100 mM NaCl), UVA/B excitation (UVA 4–5 W/m2; UVB 10–14 W/m2 for 3 h per day), or a combination of both stressors. Plant age during the trials was 32–48 days. HPLC analyses proved the enhanced accumulation of both metabolites under stress conditions. Cynaroside accumulation is effectively triggered by high-UV stress, whereas graveobioside A contents increase under salt stress. Highest contents of secondary metabolites were observed in plants exposed to combined stress. Effects of stress on overall plant performance differed significantly between treatments, with least negative impact on above ground biomass found for high-UV stressed plants. The usage of two non-destructive instruments (Dualex and Multiplex) allowed us to gain insights into the ontogenetical effects at the leaf level and temporal development of SM contents. Indices provided by those devices correlate fairly with amounts detected via HPLC (Cynaroside: r2 = 0.46–0.66; Graveobioside A: r2 = 0.51–0.71). The concentrations of both metabolites tend to decrease at leaf level during the ontogenetical development even under stress conditions. High-UV stress should be considered as a tool for enriching plant leaves with valuable SM. Effects on the performance of plants throughout a complete production cycle should be evaluated in future trials. All data is available online.

scholarly journals Nitric oxide mitigates salt stress effects of pepper seedlings by altering nutrient uptake, enzyme activity and osmolyte accumulation

2019 ◽  
Vol 25 (5) ◽  
pp. 1149-1161 ◽  
Author(s):  
Mostafakamal Shams ◽  
Melek Ekinci ◽  
Selda Ors ◽  
Metin Turan ◽  
Guleray Agar ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Enzyme Activity ◽  
Salt Stress ◽  
Nutrient Uptake ◽  
Stress Effects ◽  
Osmolyte Accumulation

Light, temperature, dry after-ripening and salt stress effects on seed germination ofPhleum sardoum(Hackel) Hackel

2013 ◽  
Vol 29 (3) ◽  
pp. 300-305 ◽  
Author(s):  
Andrea Santo ◽  
Efisio Mattana ◽  
Luca Frigau ◽  
Gianluigi Bacchetta
Keyword(s):  
Salt Stress ◽  
Seed Germination ◽  
Stress Effects

scholarly journals SALICYLIC ACID AS AN ATTENUATOR OF SALT STRESS IN SOURSOP

2020 ◽  
Vol 33 (4) ◽  
pp. 1092-1101
Author(s):  
ANDRÉ ALISSON RODRIGUES DA SILVA ◽  
GEOVANI SOARES DE LIMA ◽  
CARLOS ALBERTO VIEIRA DE AZEVEDO ◽  
LUANA LUCAS DE SÁ ALMEIDA VELOSO ◽  
HANS RAJ GHEYI
Keyword(s):  
Electrical Conductivity ◽  
Salicylic Acid ◽  
Salt Stress ◽  
Stomatal Conductance ◽  
Gas Exchange ◽  
Irrigation Water ◽  
Saline Water ◽  
Stress Effects ◽  
Saline Waters ◽  
Induced Tolerance

ABSTRACT The search for alternatives that enable the use of saline waters in agriculture has become constant. In this context, the objective was to evaluate the effects of salicylic acid in mitigating salt stress effects on the growth and gas exchange of soursop cv. ‘Morada Nova’. The study was conducted in a greenhouse, in the municipality of Campina Grande - PB, Brazil. Treatments were distributed in randomized blocks, in a 5 x 4 factorial arrangement, corresponding to five levels of electrical conductivity of irrigation water - ECw (0.8; 1.6; 2.4; 3.2 and 4.0 dS m-1) and four concentrations of salicylic acid - SA (0; 1.2; 2.4 and 3.6 mM), with three replicates. Irrigation with saline water compromised the growth and gas exchange of soursop cv. ‘Morada Nova’. However, exogenous application of salicylic acid induced tolerance to salt stress in soursop plants, as their growth, transpiration, stomatal conductance, photosynthesis and instantaneous carboxylation efficiency were favored by the application of salicylic acid, even when exposed to water salinity.

scholarly journals Salt stress effects on growth and photosynthetic pigments’ content in algoculture of Acutodesmus dimorphus (Chlorophyta)

Algologia ◽  
2017 ◽  
Vol 27 (3) ◽  
pp. 231-245
Author(s):  
K.O. Romanenko ◽  
◽  
P.O. Romanenko ◽  
L.M. Babenko ◽  
I.V. Kosakivska ◽  
...  
Keyword(s):  
Salt Stress ◽  
Photosynthetic Pigments ◽  
Stress Effects
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