Impact of Exogenous Application of Salicylic Acid on Growth, Water Status And Antioxidant Enzyme Activity of Strawberry Plants (Fragaria vesca L.) Under Salt Stress Conditions

2021 ◽  
Author(s):  
Kamal Lamnai ◽  
Fatima Anaya ◽  
Rachid Fghire ◽  
Hamza Zine ◽  
Said Wahbi ◽  
...  
Keyword(s):  
Enzyme Activity ◽  
Salicylic Acid ◽  
Salt Stress ◽  
Antioxidant Enzyme ◽  
Water Status ◽  
Antioxidant Enzyme Activity ◽  
Stress Conditions ◽  
Fragaria Vesca ◽  
Exogenous Application

Antioxidant enzyme activity and microRNA are associated with growth of Poa pratensis callus under salt stress

2020 ◽  
Vol 14 (4) ◽  
pp. 429-438
Author(s):  
Hongsong Luo ◽  
Zhixiang Zhou ◽  
Guilong Song ◽  
Hongxiang Yao ◽  
Liebao Han
Keyword(s):  
Enzyme Activity ◽  
Salt Stress ◽  
Antioxidant Enzyme ◽  
Poa Pratensis ◽  
Antioxidant Enzyme Activity

Response of antioxidant compounds to selenium and salicylic acid in wheat cultivars under dry land conditions

2013 ◽  
Vol 61 (1) ◽  
pp. 79-87 ◽  
Author(s):  
N. Sajedi ◽  
M. Boojar
Keyword(s):  
Enzyme Activity ◽  
Salicylic Acid ◽  
Grain Yield ◽  
Antioxidant Enzyme ◽  
Block Design ◽  
Seed Priming ◽  
Antioxidant Enzyme Activity ◽  
Antioxidant Compounds ◽  
Wheat Cultivars ◽  
Dry Land

In the present study, three dry land wheat cultivars, Azar 2, Sardary and Rasad, were tested for antioxidant enzyme activity, proline, malondialdehyde (MDA) and dityrosine (DT) content and grain yield after treatment with selenium and salicylic acid (SA). A factorial field experiment was carried out based on a completely randomized block design with three replicates. The experimental factors were three levels of salicylic acid (without SA; seed priming with 0.5 mM SA; seed priming + spraying with 1 mM SA) and two levels of selenium (0 and 20 g/ha). Significant increases in the activity of the superoxide dismutase (SOD), catalase (CAT) and glutathione peroxidase (GPX) enzymes and in the proline level were observed after treatment in the leaves of the three genotypes investigated, but this was associated with reduced MDA and DT content. The application of SA as seed priming and the foliar application of Se also increased the grain yield. These results suggest that cultivars exhibiting high antioxidant enzyme activity and proline content under dry land conditions may provide better drought tolerance in wheat.

scholarly journals The ThSOS3 Gene Improves the Salt Tolerance of Transgenic Tamarix hispida and Arabidopsis thaliana

2021 ◽  
Vol 11 ◽  
Author(s):  
Zhongyuan Liu ◽  
Qingjun Xie ◽  
Feifei Tang ◽  
Jing Wu ◽  
Wenfang Dong ◽  
...  
Keyword(s):  
Enzyme Activity ◽  
Salt Stress ◽  
Salt Tolerance ◽  
Antioxidant Enzyme ◽  
Electrolyte Leakage ◽  
Transgenic Arabidopsis ◽  
Antioxidant Enzyme Activity ◽  
Tamarix Hispida ◽  
Ros Scavenging ◽  
Salt Stress Response

The salt overly sensitive (SOS) signal transduction pathway is one of the most highly studied salt tolerance pathways in plants. However, the molecular mechanism of the salt stress response in Tamarix hispida has remained largely unclear. In this study, five SOS genes (ThSOS1–ThSOS5) from T. hispida were cloned and characterized. The expression levels of most ThSOS genes significantly changed after NaCl, PEG6000, and abscisic acid (ABA) treatment in at least one organ. Notably, the expression of ThSOS3 was significantly downregulated after 6 h under salt stress. To further analyze ThSOS3 function, ThSOS3 overexpression and RNAi-mediated silencing were performed using a transient transformation system. Compared with controls, ThSOS3-overexpressing transgenic T. hispida plants exhibited greater reactive oxygen species (ROS)-scavenging capability and antioxidant enzyme activity, lower malondialdehyde (MDA) and H2O2 levels, and lower electrolyte leakage rates under salt stress. Similar results were obtained for physiological parameters in transgenic Arabidopsis, including H2O2 and MDA accumulation, superoxide dismutase (SOD) and peroxidase (POD) activity, and electrolyte leakage. In addition, transgenic Arabidopsis plants overexpressing ThSOS3 displayed increased root growth and fresh weight gain under salt stress. Together, these data suggest that overexpression of ThSOS3 confers salt stress tolerance on plants by enhancing antioxidant enzyme activity, improving ROS-scavenging capability, and decreasing the MDA content and lipid peroxidation of cell membranes. These results suggest that ThSOS3 might play an important physiological role in salt tolerance in transgenic T. hispida plants. This study provides a foundation for further elucidation of salt tolerance mechanisms involving ThSOSs in T. hispida.

Nitric Oxide Enhances Salt Tolerance through Regulating Antioxidant Enzyme Activity and Nutrient Uptake in Pea

2020 ◽  
Author(s):  
Esin Dadasoglu ◽  
Melek Ekinci ◽  
Raziye Kul ◽  
Mostafakamal Shams ◽  
Metin Turan ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Enzyme Activity ◽  
Salt Stress ◽  
Nutrient Uptake ◽  
Antioxidant Enzyme ◽  
Crop Production ◽  
Electrical Conductance ◽  
Antioxidant Enzyme Activity ◽  
Stress Factors ◽  
The Impact

Background: Salinity is one of the environmental stress factors that restrict the crop production by endangering agricultural areas. Nitric oxide (NO) protects plants from damage caused by oxidative stress conditions in various biological ways. Methods: In this greenhouse investigation during 2018, pea plants were irrigated with three levels of NaCl (0, 50 and 100 mM) solutions. NO solutions were prepared with three different doses (0, 75 and 100 µM SNP). These solutions were applied to the seeds before sowing and then to the leaves of the pea cultivars. The study was conducted to analyze the impact of NO on growth, malondialdehyde (MDA), hydrogen peroxide (H2O2), antioxidant enzyme activity and nutrient uptake in two pea cultivars under salinity conditions. Result: Salinity reduced fresh-dry weight, relative water content (RWC), and chlorophyll a and b content of pea. However, NO enhanced these parameters under salt stress. Salinity increased tissue electrical conductance (TEC), H2O2 and MDA content, which were decreased by combined application of NaCl and NO. Salinity caused an increase in antioxidant enzyme activity in pea and NO made a significant improvement in their activities under salinity conditions. Salinity treatments decreased the ratio of K+/Na+ and Ca2+/Na+ in both cultivars, and application of NO elevated them as compared to the control under salt stress. In conclude, exogenous NO treatment could help pea to tolerate salinity stress by increasing the chlorophyll content and regulating antioxidant enzyme activity and nutrient uptake.

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