scholarly journals Exogenous salicylic acid and thiourea ameliorates the negative effects of salt stress on a wheat variety BARI Gom-30 (Triticum aestivum L.) by the enhancement of photosynthesis attributes and antioxidant enzyme activities

2020 ◽  
pp. 1
Author(s):  
Sumaiya Farzana ◽  
Md Rasel ◽  
Md Arif ◽  
Md Galib ◽  
Kishor Sarker ◽  
...  
Keyword(s):  
Triticum Aestivum ◽  
Salicylic Acid ◽  
Salt Stress ◽  
Antioxidant Enzyme ◽  
Enzyme Activities ◽  
Wheat Variety ◽  
Triticum Aestivum L ◽  
Antioxidant Enzyme Activities ◽  
Negative Effects ◽  
Exogenous Salicylic Acid

scholarly journals THE EFFECTS OF NITRIC OXIDE ON SOME ANTIOXIDANT ENZYME ACTIVITIES UNDER SALT STRESS IN SUNFLOWER PLANTS

2019 ◽  
Vol 18 (5) ◽  
pp. 171-179
Author(s):  
Fusun Yurekli ◽  
Oguz A. Kirecci ◽  
Ilknur Celik
Keyword(s):  
Nitric Oxide ◽  
Salt Stress ◽  
Antioxidant Enzyme ◽  
Enzyme Activities ◽  
Antioxidant Enzyme Activities ◽  
Oxygen Species ◽  
Negative Effects ◽  
No Donor ◽  
Tolerant Variety ◽  
Leaf Tissues

The effects of externally applied sodium nitroprusside on superoxide dismutase (SOD), glutathione peroxidase (GPx), ascorbate peroxidase (APX), and catalase (CAT) antioxidant enzyme activities, nitric oxide (NO) levels have investigated in salt stress resistant and sensitive sunflower plants. NaCl treatments and SNP treatments simultaneous with salt application (NaCl + SNP) were performed. SOD, GPx, APX and CAT antioxidant enzyme activities and NO levels, showed differences in leaf tissues treated with 100 µM SNP, different concentrations of NaCl, and NaCl + SNP. SOD, GPx and APX enzyme activities were generally increased in sensitive variety but decreased in tolerant variety. However, while generally increase in CAT enzyme activity was determined in tolerant type, a reduction was established in sensitive type. An increase was determined in both types in NO levels. It is evident from these results that administration of NO donor SNP can cope with reactive oxygen species in both varieties. This study indicates that the negative effects of salt stress on different sun flower varieties can be recovered by nitric oxide.

scholarly journals Study of silicon effects on antioxidant enzyme activities and osmotic adjustment of wheat under drought stress

2011 ◽  
Vol 47 (No. 1) ◽  
pp. 17-27 ◽  
Author(s):  
S. Tale Ahmad ◽  
R. Haddad
Keyword(s):  
Drought Stress ◽  
Antioxidant Enzyme ◽  
Osmotic Adjustment ◽  
Enzyme Activities ◽  
Soluble Protein ◽  
Membrane Damage ◽  
Triticum Aestivum L ◽  
Growth Stages ◽  
Antioxidant Enzyme Activities ◽  
Randomized Design

The effect of silicon (Si) was investigated on the major antioxidant enzyme activities including superoxide dismutase (SOD), catalase (CAT), ascorbate peroxidase (APX), peroxidase (POD), relative water content (RWC), chlorophyll and soluble protein contents, proline (Pro) and glycine betaine (GB) accumulation in three different growth stages (2<sup>nd</sup>, 4<sup>th</sup> leaf and tillering stages) of wheat (Triticum aestivum L.) plants under drought stress. The experiment was performed in a completely randomized design for three treatments including control, drought and Si-drought (2mM silicate sodium/kg) with three replications in a greenhouse. The results indicated that Si partially offset the negative impacts of drought stress increasing the tolerance of wheat by rising Pro and GB accumulation and soluble protein content. Compared with the plants treated with drought, applied Si significantly enhanced the activities of SOD, CAT, APX and POD. In contrast, drought stress caused a considerable decrease in RWC, chlorophyll and soluble protein contents. This Si effect was time-dependent and became stronger in the tillering stage. The results of the present experiment coincided with the conclusion that Si alleviates water deficit of wheat by preventing the oxidative membrane damage and may be associated with plant osmotic adjustment.

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