scholarly journals Action of methyl jasmonate and salt stress on antioxidant system of Arabidopsis plants defective in jasmonate signaling genes

2018 ◽  
Vol 90 (5) ◽  
pp. 50-59 ◽  
Author(s):  
Т. О. Yastreb ◽  
◽  
Yu. E. Kolupaev ◽  
N. V. Shvidenko ◽  
A. P. Dmitriev ◽  
...  
Keyword(s):  
Salt Stress ◽  
Methyl Jasmonate ◽  
Antioxidant System ◽  
Jasmonate Signaling

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.

Methyl jasmonate improves tolerance to high salt stress in the recretohalophyte Limonium bicolor

2019 ◽  
Vol 46 (1) ◽  
pp. 82 ◽  
Author(s):  
Fang Yuan ◽  
Xue Liang ◽  
Ying Li ◽  
Shanshan Yin ◽  
Baoshan Wang
Keyword(s):  
Salt Stress ◽  
Salt Tolerance ◽  
Methyl Jasmonate ◽  
Salt Gland ◽  
Underlying Mechanism ◽  
Photosynthetic Parameters ◽  
Salt Glands ◽  
Plasma Membrane Permeability ◽  
Limonium Bicolor ◽  
Relative Electrical Conductivity

Limonium bicolor is a typical recretohalophyte with salt glands in the epidermis, which shows maximal growth at moderate salt concentrations (100mM NaCl) but reduced growth in the presence of excess salt (more than 200mM). Jasmonic acid (JA) alleviates the reduced growth of L. bicolor under salt stress; however, the underlying mechanism is unknown. In this study we investigated the effects of exogenous methyl jasmonate (MeJA) application on L. bicolor growth at high NaCl concentrations. We found that treatment with 300mM NaCl led to dramatic inhibition of seedling growth that was significantly alleviated by the application of 0.03mM MeJA, resulting in a biomass close to that of plants not subjected to salt stress. To determine the parameters that correlate with MeJA-induced salt tolerance (assessed as the biomass production in saline and control conditions), we measured 14 physiological parameters relating to ion contents, plasma membrane permeability, photosynthetic parameters, salt gland density, and salt secretion. We identified a correlation between individual indicators and salt tolerance: the most positively correlated indicator was net photosynthetic rate, and the most negatively correlated one was relative electrical conductivity. These findings provide insights into a possible mechanism underlying MeJA-mediated salt stress alleviation.

scholarly journals Mitigation of salt stress in rice plant at germination stage by using methyl jasmonate

2016 ◽  
Vol 2 (1) ◽  
pp. 74-81 ◽  
Author(s):  
Sakil Mahmud ◽  
Shayla Sharmin ◽  
Bishan Lal Das Chowdhury ◽  
Mohammad Anowar Hossain ◽  
Muhammad Javidul Haque Bhuiyan
Keyword(s):  
Salt Stress ◽  
Methyl Jasmonate ◽  
Root Length ◽  
Growth Parameters ◽  
Dry Weight ◽  
Germination Percentage ◽  
Alpha Amylase ◽  
Rice Varieties ◽  
Biochemical Component ◽  
Germination Stage

To explore the possibility of using methyl jasmonate (MeJA) for alleviation of salt stress, the present study was conducted where six rice varieties (BRRI dhan31, BRRI dhan46, Gota, Kajalsail, Pokkali and Pengek) were grown in non saline (0 dSm-1), saline (12 dSm-1), saline (12 dSm-1) + 10 ?M MeJA and saline (12 dSm-1) + 20 ?M MeJA conditions at germination stage (till the 9 days). MeJA was applied by imbibing seeds in it for 24 hours. To evaluate the effect of MeJA on saline stressed plant at germination stage, change in growth parameters namely germination percentage, shoot and root length, fresh and dry wt. of shoot, fresh and dry wt. of root and biochemical component- activity of alpha-amylase were monitored. Salinity had a minimum effect on final germination percentage (FGP) of rice varieties, but delayed in attaining it. MeJA had least positive effect. Salinity significantly reduced the shoot and root length, fresh and dry weight of all the varieties. MeJA had more decreasing effect in susceptible varieties while increasing effect in moderately tolerant and tolerant. Activity of alpha-amylase in germinated seed varied from 0.051 mg to 0.111 mg mal./mg tissue. At 12dSm-1 salinity, susceptible and moderately tolerant varieties showed significant reduction but tolerant showed significant increase. MeJA intensified the negative effect further in susceptible varieties. In tolerant and moderately tolerant varieties, increment in activity took place and 10 ?M had a better effect over 20 ?M MeJA.Asian J. Med. Biol. Res. March 2016, 2(1): 74-81

scholarly journals Differential Response to Sea Salt Salinity by Nitrate and Antioxidant System in Six Soybean Varieties

2015 ◽  
Vol 48 (4) ◽  
pp. 39-50 ◽  
Author(s):  
K.M. Saad-Allah
Keyword(s):  
Salt Stress ◽  
Antioxidant System ◽  
Salt Concentration ◽  
Nitrate Uptake ◽  
Adaptive Strategy ◽  
Differential Response ◽  
Sea Salt ◽  
Negative Consequences ◽  
Gradual Decline ◽  
Glycine Max L

AbstractSix varieties of soybean (Glycine max L.) plants were grown for 30 days under three levels of sea salt salinity (0.0, 8.0 and 16.0 mS/cm2) for studying the effect of sea salt on uptake of nitrate and response of the antioxidant system for these salinity doses. Salt treatments resulted in a gradual decline in nitrate uptake by increasing sea salt concentration, which mean that this will bring negative consequences on nitrogen assimilation. However, salt treatments induced the accumulation of hydrogen peroxide and glycinebetaine in the leaves of all soybean verities as an adaptive strategy to cope with salt stress. On the other hand, there was a differential response in phenolic compounds among soybean verities as a function of salt concentration and the studied variety, which means there has a decline in phenolics under salt stress in the varieties Crawford, G21, G22 and G83, but in contrary in G35 and G82, phenolics has accumulated in response to salinity. Isozymes electrophoretic banding showed changes in peroxidase activity with sea salt, however superoxide dismutase showed stability in number and intensity of bands with salt treatments. Esterase enzyme was more sensitive to salinity and showed a gradual decline in activity by increasing salt concentration.

Effect of salt stress on growth parameters, enzymatic antioxidant system, and lipid peroxidation in wild chicory (Cichorium intybus L.)

2012 ◽  
Vol 34 (6) ◽  
pp. 2349-2358 ◽  
Author(s):  
Lucrezia Sergio ◽  
Angela De Paola ◽  
Vito Cantore ◽  
Maria Pieralice ◽  
Nicholas Anthony Cascarano ◽  
...  
Keyword(s):  
Lipid Peroxidation ◽  
Salt Stress ◽  
Antioxidant System ◽  
Growth Parameters ◽  
Cichorium Intybus ◽  
Enzymatic Antioxidant
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