Studying the effects of Potassium Phosphite (1%) on physiological changes in potato (Solanum tubrusum L.) tuber under late blight stress

Phosphite-based fungicides are a group of chemicals that are directly harmless to the environment and have a direct fungicide effect, while also indirectly stimulating the plant immune response. Potato late blight is one of the most destructive potatoes diseases globally, causing many morphological and physiological changes in potato leaves and tubers. In current experiment, the potato plants with three-time spray of potassium phosphite (KPhi) on potato leaves, following three months in storage, and inoculated with late blight were investigated. This study examined the possible role of KPhi in delays of late blight invasion and physiological responses including the reactive oxygen species (ROS) metabolism in potato tubers after challenging with late blight pathogen. Samples were collected at 0, 24, 48, 72 and 96 hours of time points for evaluations. Antioxidant enzymes such as superoxidase dismutase (SOD), peroxidase (POD) and catalase (CAT), in addition content of metabolites such as phytoalexin and phenolic after infection with pathogen was investigated. Meanwhile, KPhi treatment resulted in plant tolerance with improved resistance, increased antioxidant enzymes activities and non-enzymatic compounds compare to untreated plants under similar stress. The results of this study indicate that the role of KPhi reduces the adverse effects of pathogens, suppress potato late blight and improves antioxidant enzymes activities and non-enzymatic compounds in potato tubers.

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The role of melatonin on uteroplacental antioxidant enzymes activities and fetal growth retardation in diabetic rats (910.1)

The FASEB Journal ◽

10.1096/fasebj.28.1_supplement.910.1 ◽

2014 ◽

Vol 28 (S1) ◽

Author(s):

Luqman Olayaki

Keyword(s):

Antioxidant Enzymes ◽

Fetal Growth ◽

Growth Retardation ◽

Diabetic Rats ◽

Fetal Growth Retardation ◽

Enzymes Activities ◽

Antioxidant Enzymes Activities

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Amelioration of Benzo[a]pyrene-induced oxidative stress and pulmonary toxicity by Naringenin in Wistar rats: A plausible role of COX-2 and NF-κB

Human & Experimental Toxicology ◽

10.1177/0960327116650009 ◽

2016 ◽

Vol 36 (4) ◽

pp. 349-364 ◽

Cited By ~ 15

Author(s):

R Ali ◽

A Shahid ◽

N Ali ◽

SK Hasan ◽

F Majed ◽

...

Keyword(s):

Oxidative Stress ◽

Antioxidant Enzymes ◽

Pulmonary Toxicity ◽

Radical Scavenging ◽

Protective Agent ◽

Enzymes Activities ◽

Cell Counts ◽

Antioxidant Enzymes Activities ◽

Cox 2

Naringenin is a naturally occurring flavanones and has been found to exhibit free radical scavenging, enzyme inhibition, antioxidants, anti-inflammatory, and anticancer activities. Present study was designed to evaluate the protective role of naringenin against benzo[a]pyrene (B[a]P)-induced oxidative stress and pulmonary toxicity. Rats were treated with naringenin at a dose of 100 mg/kg body weight (b. wt.), by oral gavage. B[a]P in a single dose of 50 mg/kg b. wt. was given intraperitoneally. Total protein, total cell counts, lactate dehydrogenase, lipid peroxidation, reduced glutathione, antioxidant enzymes activities, lung histology and expression of nuclear factor kappa B (NF-κB), and cyclo-oxygenase-2 (COX-2) was assessed to evaluate protective effects of naringenin. Histopathological and immunohistochemical studies were also carried out to observe lung toxicity and inflammation. B[a]P administration enhanced the levels of lung injury markers and reduced antioxidant enzymes activities. Naringenin treatment attenuated the levels of oxidative stress by restoring antioxidant enzymes, further improved lung histological damage and significant decrease in inflammatory responses. Naringenin also effectively decreased the expression of NF-κB, and COX-2 induced by B[a]P. These findings suggest that naringenin supplementation is beneficial in maintaining the integrity of alveoli and the epithelium that may be used as a protective agent in B[a]P-induced oxidative stress and lung damage. However, further studies are warranted to elucidate the potential mechanism of action of naringenin.

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