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1
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
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The relationship between nitric oxide and plant hormones in SNP administrated sunflower plants under salt stress condition

100%
Yurekli F., Kirecci O. A.
Acta Scientiarum Polonorum. Hortorum Cultus
|
2016
|
tom 15
|
nr 6
Nitric oxide (NO) and sodium nitro prusside (SNP) are striking molecules and play important roles in animals and plants. SNP serves as nitric oxide donor in both group. NO can act free radical and impaires important biomolecules functions beside this it has beneficial effect recovery from salinity, drought etc. NO and SNP are beneficial and protectant molecules in cope with stressfull conditions. In plants these molecules are very important, and regulate many physiological events. In the present study, endogen abscisic acid (ABA), indole acetic acid (IAA), gibberellic acid (GA3 ) and NO levels were investigated in NaCl, SNP and plant growth regulators treated sunflower plant (Helianthus annuus L.) leaves and roots. The content of NO was higher in GA3 + SNP treated plant leaves at 72 h. The highest IAA level was determined in IAA + SNP treated plant roots at 72 h. In NaCl + ABA treated plant leaves ABA was higher at 72 and GA3 levels were equal or less than the control group. Our results showed that coadministration of SNP and plant growth regulators cope with salinity stress via elevated internal hormone and NO level versus salinity.
2

The effects of excessive exposure to copper in bean plants

100%
Yurekli F., Banu Porgali Z.
Acta Biologica Cracoviensia. Series Botanica
|
2006
|
tom 48
|
nr 2
The present study aimed to identify changes in important physiological events related to Cu, malondialdehyde (MDA), nitric oxide (NO), chlorophyll a and chlorophyll b content in the antioxidative defense system in bean seedlings (Phaseolus vulgaris L. cv. Akman) after Cu treatment. The activity of superoxide dismutase (SOD), peroxidase (POD) and catalase (CAT) were determined. Cu excess was induced in Phaseolus vulgaris (cv. Akman) plants by soaking the roots in 100 µM CuSO4 solution for 10 days. Cu content increased in roots, and nitric oxide levels increased remarkably in leaf tissue. Changes in enzyme activity and MDA were observed in root tissue. The highest accumulation of NO was observed in leaf tissue. The study included an assessment of the correlation between heavy metal accumulation in roots, leading to different manifestations of stress, and changes in chlorophyll level. Indications of oxidative stress response were detected by monitoring changes in the activity and content of some components of the antioxidative mechanism. Cu treatment increased the activity of superoxide dismutase, peroxidase and catalase in leaf tissue.
3
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The effects of nitric oxide on some antioxidant enzyme activities under salt stress in sunflower plants

81%
Yurekli F., Kirecci O. A., Celik I.
Acta Scientiarum Polonorum. Hortorum Cultus
|
2019
|
tom 18
|
nr 5
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 been investigated in salt stress resistant and sensitive sunflower plants. NaCl treatments and SNP treatments simultaneously 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 general 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 negative effects of salt stress on different sun flower varieties can be recovered by nitric oxide.
4

Variations in abscisic acid, indole-3-acetic acid, gibberellic acid and zeatin concentrations in two bean species subjected to salt stress

81%
Yurekli F., Porgali Z. B., Turkan I.
Acta Biologica Cracoviensia. Series Botanica
|
2004
|
tom 46
201-212
Common bean (Phaseolus vulgaris L.) is sensitive to drought and salinity, while an ancestral legume, tepary bean (P. acutifolius A. Gray) is cultivated successfully where high temperature and drought are common (Lazcano-Ferrat and Lovatt, 1999). Hence, P. acutifolius is a potential source of stress tolerant traits for P. vulgaris through interspecific hybrids. This study comparatively evaluated the effects of salt stress on leaf relative water content (RWC), soluble protein, the phytohormones indole acetic acid (IAA), gibberellic acid (GA3), zeatin, and abscisic acid (ABA) levels in P. vulgaris and P. acutifolius. With the exception of ABA, stress-induced changes in hormonal levels putatively related to stress tolerance have not been investigated previously in either species. Treatment with 50 mM, 100 mM and 150 mM NaCl reduced relative water and protein content in P. vulgaris, but did not affect relative water content and increased protein content in P. acutifolius. Varietal differences between P. vulgaris and P. acutifolius were also observed in hormonal content during the stress period. ABA levels in salt-treated plants of P. vulgaris increased but did not change in P. acutifolius versus the controls. Both IAA and gibberellin levels increased in leaves of P. acutifolius but decreased in P. vulgaris under salt stress. In salt-treated plants, zeatin concentrations in leaves of P. vulgaris decreased within 24-72 h after treatment. However, P. acutifolius responded to all tested NaCl levels by increasing zeatin concentrations after short-term NaCl treatment.
5

Stimulated superoxide dismutase (SOD) activity and enhanced nitric oxide (NO) in bean plant: the effect of cadmium

71%
Yurekli F., Porgali Z. B., Dogru A., Dogru M. I., Yurekli M.
Acta Physiologiae Plantarum
|
2004
|
tom 26
|
nr 3 suppl.
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