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Number of results: 5
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Abstract

Polygonum orientale with beautiful red flowers can be found as one dominant species in the vicinity of most water bodies and wetlands in China. However, its phytoremediation potential has not been sufficiently explored because little is known about its resistance to inorganic or organic pollutants. We investigated P. orientale response to low and moderate levels of phenol stress (≤ 80 mg L-1). Endpoints included phenol tolerance of P. orientale and the removal of the pollutant, antioxidant enzyme activities, damage to the cell membrane, osmotic regulators and photosynthetic pigments. In plant leaves, phenol stress significantly increased the activities of peroxidase (POD) and catalase (CAT), as well as the contents of proline, soluble sugars and carotenoids, whereas superoxide dismutase (SOD), H2O2 and electrolyte leakage (EL) levels remained unaltered. On the other hand, there were significant decreases of soluble protein and chlorophyll contents. We demonstrated that, in combination with phenol tolerance and its removal, P. orientale has efficient protection mechanisms against phenol-induced oxidative damage (≤ 80 mg L-1). We propose that P. orientale could be used as an alternative and interesting material in the phytoremediation of phenol.

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Authors and Affiliations

Kai Wang
Jin Cai
Shulian Xie
Jia Feng
Ting Wang
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Abstract

In our previous Genome-wise Association Study we found that Cystic Fibrosis Transmem- brane Conductance Regulator gene (CFTR) is a candidate gene for sperm motility in fresh semen of Holstein-Friesian bulls. Since in cows thawed semen is commonly used for the artificial insem- ination (AI) we have decided to find out whether functional polymorphism within CFTR gene coding sequence is associated with selected parameters of thawed sperm, including their motility evaluated by computer-assisted sperm analysis (CASA), the activity of three antioxidant enzymes: glutathione peroxidase (GPx) catalase (CAT), superoxide dismutase (SOD), ATP con- tent and integrity of sperm membranes. One hundred twenty Holstein Friesian bulls kept in uni- form environmental conditions (one AI company) were included in the study. Significant associ- ations between genotypes of missense mutation within exon 11 of the CFTR gene (Met468Leu) and the activity of antioxidant enzymes and sperm mitochondrial function were revealed. No effect of CFTR genotypes on sperm motility was observed. Significant differences in CAT and SOD activity were found between AA and TT homozygous individuals. Bulls with TT genotype had the lowest activity of both antioxidant enzymes. The same bulls also showed the lowest num- ber of sperm with active mitochondria. Our results demonstrate that missense mutation Met468Leu within CFTR gene is associated with antioxidant enzyme activity and mitochondrial function of bovine thawed sperm without affecting their motility.

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Authors and Affiliations

S. Kaminski
D.M. Hering
W. Kordan
M. Lecewicz
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Abstract

The study was carried out to investigate the interactive effects of exogenous melatonin and excess amounts of zinc and copper on the growth and physiological parameters, antioxidant defense system and nutritional balance of cannabis seedlings. Cannabis sativa L. plants, grown under a completely randomized design, were irrigated with complete Hoagland’s nutrient solution. CuSO 4 (0, 50 and 150 µM) and ZnSO 4 (0, 50 and 100 µM) and their combinations were supplied to 21-day-old seedlings for 2 weeks. During the second week, melatonin was added to the nutrient solution at 100 μM. Zn and Cu stress led to reduced growth and physiological parameters, it promoted oxidative stress, changes in antioxidant enzymes activity and imbalance of mineral nutrients in cannabis seedlings. However, melatonin alleviated the growth retardation and physiological disorders of seedlings under normal conditions and heavy metal stress. The content of reduced glutathione and the activity of antioxidant enzymes such as glutathione reductase and ascorbate peroxidase were improved by melatonin. Excess amounts of zinc and copper changed the pattern of nutritional elements distribution in cannabis seedlings. Cu and Zn caused reduced content of Fe, Ca and K ions in shoots and roots. Melatonin treatment was able to adjust the nutrients content in metal-stressed seedlings up to the level of the control. Exogenous melatonin reduced toxic levels of Cu and Zn in seedlings overloaded with copper and zinc. MT also raised K, Ca and Fe concentrations in roots and shoots of seedlings under stress. Our results support the idea that melatonin acts as a powerful antioxidant, it can also be considered as a potent regulator of ion homeostasis in cannabis seedlings under heavy metal toxicity. Further studies still need to investigate the alleviatory effects of melatonin under field conditions.
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Authors and Affiliations

Hakimeh Oloumi
1
Ali Zamani
1
Hossein Mozaffari
1
Seyyed Mohammad Javad Arvin
2
Hassan Salari
1

  1. Department of Ecology, Institute of Science and High Technology and Environmental Sciences, Graduate University of Advanced Technology, Kerman, Iran
  2. Plant Products Division, Shahid Bahonar University, Kerman, Iran
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Abstract

The present study was designed to evaluate the protective efficacy of troxerutin against cypermethrin-induced behavioral defects, motor function abnormalities, and oxidative stress in mice. Twenty-four adult female albino mice were randomly divided into four equal groups. The first group served as control, the second group was treated with cypermethrin (20 mg/kg b.w) intraperitoneally at day 21, and the remaining two groups were orally supplemented with TRX (150, 300 mg/kg b.w) for 20 days and with cypermethrin (20 mg/kg b.w) intraperitoneally at day 21. Behavior activities recorded after cypermethrin exposure showed significantly impaired motor function (p≤0.05) as evidenced by the beam balance and pole test. The cypermethrin was also found to cause significant memory dysfunction. Moreover, the oxidative stress in terms of increased tissue malondialdehyde level (p≤0.05) was recorded in the cypermethrin group. The antioxidant activities of catalase and glutathione peroxidase were decreased (p≤0.05) after cypermethrin exposure. Troxerutin supplementation significantly improved the cypermethrin- -induced motor impairment and memory dysfunction. The supplementation of troxerutin significantly restored the redox status. Troxerutin attenuates the neurotoxic and behavioral deficits caused by cypermethrin. Furthermore, troxerutin also provides significant protection against cypermethrin-induced oxidative stress by improving the oxidative stress markers.
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Authors and Affiliations

S. Shehzad
1
Z. Farooq
1
S.K. Tahir
1
M.I. Masood
2
S.M.M. Anjum
2
A.A. Saeed
1
M.S. Yousaf
1
K.A. Majeed
1
I. Rabbani
1
S. Basharat
1

  1. Department of Physiology, University of Veterinary and Animal Sciences, Syed Abdul Qadir Jilani (Out Fall) Road, Lahore 54000, Pakistan
  2. Institute of Pharmaceutical Sciences, University of Veterinary and Animal Sciences, Syed Abdul Qadir Jilani (Out Fall) Road, Lahore 54000, Pakistan
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Abstract

Duringthe evolution organisms are subjected to the continuous impact of environmental factors. In recent years an increasing number of studies have focused on the physicochemical limits of lifeon Earthsuch as temperature, pressure, drought, salt content, pH, heavy metals, etc. Extreme environmental conditions disrupt the most important interactions that support the function and structure of biomolecules.Forthis reason,organisms inhabiting extreme habitats have recently become of particularlygreat interest. Although filamentous fungi are an important partof the polar ecosystem, information about their distribution and diversity, as well as their adaptation mechanisms, is insufficient. In the present study,the fungal strain Penicillium griseofulvum isolated from an Antarctic soil sample was used as a study model. The fungal cellular response against short term exposure to low temperature was observed. Our results clearly showed that short-term low temperature exposure caused oxidative stress in fungal cells and resulted in enhanced level of oxidative damaged proteins, accumulation of reserve carbohydrates and increased activity of the antioxidant enzyme defence. Ultrastructural changes in cell morphology wereanalysed. Different pattern of cell pathology provoked by the application of two stress temperatures was detected. Overall, this study aimed to observe the survival strategy of filamentous fungi in extremely cold habitats, and to acquire new knowledge about the relationship between low temperature and oxidative stress.
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Authors and Affiliations

Ekaterina Ts. Krumova
1
Ekaterina K. Koeva
1
Stoyanka R. Stoitsova
1
Tsvetelina S. Paunova-Krasteva
1
Galina D. Stoyancheva
1
Maria B. Angelova
1

  1. The Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences, 26, Acad. G. Bonchev str., 1113 Sofia, Bulgaria

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