Aluminium induced oxidative stress and DNA damage in root cells of Allium cepa L.

Oxidative stress has a crucial role in the progression of diabetes and its complications. Soluble fibre-rich fenugreek seeds (Trigonella foenum-graecum L.) are understood to have a beneficial effect in the management of diabetes. Previously, we have shown that the amelioration of diabetic hyperglycemia and related metabolic abnormalities was potentiated by onion (Allium cepa L.) in experimental rats. The present study evaluated the additive beneficial effect of dietary fenugreek seeds (10%) and onion (3%) on oxidative stress in diabetic rats. These dietary interventions lowered oxidative stress, the combination producing a higher beneficial effect (p < 0.05), although not additive. Dietary fenugreek, onion, or fenugreek+onion countered hypercholesterolemia (p < 0.05), especially from low-density lipoprotein−associated fraction by 43%, 35%, and 54%, respectively. Elevated concentrations of cholesterol and triglycerides in the liver and heart under diabetic conditions were significantly counteracted by these dietary interventions, with the additive combination resulting in greater effect. These findings were also corroborated by restoration of histopathological abnormalities of heart and liver tissues along with lowered heart and liver weights. It is inferred that an alleviation of oxidative stress contributes further to the antidiabetic influence and this nutraceutical potential of fenugreek seeds and onion was higher when consumed together.

Download Full-text

A Comparison of Cytotoxic and Genotoxic Damages Induced by 254 Nm and 365 Nm Radiation: Allium Cepa L. Model

10.21203/rs.3.rs-412704/v1 ◽

2021 ◽

Author(s):

Kültiğin ÇAVUŞOĞLU ◽

Tuğçe Kalefetoğlu Macar ◽

Oksal MACAR ◽

Dilek ÇAVUŞOĞLU ◽

Emine YALÇIN

Keyword(s):

Oxidative Stress ◽

Allium Cepa ◽

Germination Percentage ◽

The Other ◽

Uv Exposure ◽

Control Group ◽

Total Weight Gain ◽

Allium Cepa L ◽

Living Organisms ◽

Uv C

Abstract Living organisms are increasingly exposed to ultraviolet (UV) rays of solar radiation, both due to the thinning of the ozone layer and the widespread uses in sterilization processes. The present study was conducted with the purpose of evaluating the damages of UV-A and UV-C radiations in Allium cepa L. roots. Three groups were formed from Allium bulbs, one of which was the control group. One of the other groups was exposed to 254 nm (UV-C) and the other to 365 nm (UV-A) UV. Growth retardation effect of UV was investigated with respect to germination percentage, total weight gain and root elongation, while genotoxicity arisen from UV exposure analyzed using mitotic index (MI) and chromosomal aberrations (CAs) including micronucleus (MN) frequency. Oxidative stress due to UV application was investigated based on the accumulation of malondialdehyde (MDA) and the total activities of superoxide dismutase (SOD) and catalase (CAT) enzymes. Also, meristematic integrity of the UV treated roots was controlled. UV treatments caused significant changes in all parameters compared to the control, but all effects were much more prominent in 254 nm UV-exposed group. This study clearly revealed that UV exposure triggered growth inhibition, genotoxicity, oxidative stress and meristematic cell damages in A. cepa roots depending on the wavelength.

Download Full-text