Cold shock treatment with oxalic acid could alleviate chilling injury in green bell pepper by enhancing antioxidant enzyme activity and regulating proline metabolism

2022 ◽  
Vol 295 ◽  
pp. 110783
Author(s):  
Feng Wang ◽  
Qingzhen Yang ◽  
Qifeng Zhao ◽  
Xin Li
Keyword(s):  
Enzyme Activity ◽  
Oxalic Acid ◽  
Antioxidant Enzyme ◽  
Cold Shock ◽  
Chilling Injury ◽  
Antioxidant Enzyme Activity ◽  
Shock Treatment ◽  
Bell Pepper ◽  
Proline Metabolism

scholarly journals Chilling injury in pineapple fruits: physical quality attributes and antioxidant enzyme activity

Food Research ◽  
2020 ◽  
Vol 4 (S5) ◽  
pp. 86-95
Author(s):  
N.H. Dolhaji ◽  
I.D. Muhammad ◽  
H. Yaakob ◽  
A. Mohd Marsin
Keyword(s):  
Enzyme Activity ◽  
Antioxidant Enzyme ◽  
Cold Storage ◽  
Nutritional Value ◽  
Chilling Injury ◽  
Quality Attributes ◽  
Antioxidant Enzyme Activity ◽  
Cold Chain ◽  
Physical Quality ◽  
Related Enzyme

Harvested fruit have high metabolic and moisture content which leads to an active biochemical reaction that contributes to decrement of nutritional value such as vitamin, proteins and lipids. The application of low temperature as a single-effective management to prolong shelf-life of fruits is a common practice which applied to keep agriculture commodities at high quality. A matured stage pineapple is very perishable and cold storage chain is crucial in maintaining the chemical and physical quality attributes in order to assure its commercial value for market. The main objective of this study is to evaluate the effect of sub-optimum cold storage scenario on changes of pineapple fruits physical quality attributes, the activity of browning enzyme and antioxidant related enzyme in 2 pineapple cultivars (cv.), Morris (Queen-type) and Josapine (hybrid of Spanish and Smooth Cayeen). Malaysian pineapple fruit cv. with different sensitivity toward CI, Morris (Queen-type) and Josapine (Smooth-Cayenne-type) were stored at sub-optimal storage temperatures (4±2°C) for 28 days to investigate the effects of CI towards physical quality attributes and antioxidant enzyme activity. The result indicated both cv. was affected with CI towards the 28 days of sub-optimum cold storage. Overall physical quality attributes indicated CI was found positively correlated with the increase of EL and TTA and on the contrary decrease its firmness, weight (% w/w), brightness (L*) and redness (A*). Similarly, a positive correlation was also deduced between CI symptoms and the activities of PPO and APX which reflect the incident of oxidative stress. The results derived from this study may serve as a basis for evaluation of better postharvest strategies to control CI during cold chain storage of pineapple fruits and thus assure the quality and nutritional value till it reaches to consumer.

Methyl jasmonate reduces chilling injury and enhances antioxidant enzyme activity in postharvest loquat fruit

2009 ◽  
Vol 115 (4) ◽  
pp. 1458-1463 ◽  
Author(s):  
Shifeng Cao ◽  
Yonghua Zheng ◽  
Kaituo Wang ◽  
Peng Jin ◽  
Huaijing Rui
Keyword(s):  
Enzyme Activity ◽  
Methyl Jasmonate ◽  
Antioxidant Enzyme ◽  
Chilling Injury ◽  
Antioxidant Enzyme Activity

Antioxidant Enzyme Levels Inversely Covary with Hearing Loss After Amikacin Treatment

2003 ◽  
Vol 14 (03) ◽  
pp. 134-143 ◽  
Author(s):  
James J. Klemens ◽  
Robert P. Meech ◽  
Larry F. Hughes ◽  
Satu Somani ◽  
Kathleen C.M. Campbell
Keyword(s):  
Hearing Loss ◽  
Enzyme Activity ◽  
Antioxidant Enzyme ◽  
Guinea Pigs ◽  
Auditory Brainstem ◽  
Antioxidant Enzyme Activity ◽  
Control Group ◽  
Glutathione S Transferase ◽  
Brainstem Response ◽  
The Difference

This study's purpose was to determine if a correlation exists between cochlear antioxidant activity changes and auditory function after induction of aminoglycoside (AG) ototoxicity. Two groups of five 250-350 g albino guinea pigs served as subjects. For 28 days, albino guinea pigs were administered either 200 mg/kg/day amikacin, or saline subcutaneously. Auditory brainstem response testing was performed prior to the first injection and again before sacrifice, 28 days later. Cochleae were harvested and superoxide dismutase, catalase, glutathione peroxidase, glutathione-S-transferase, glutathione reductase activities and malondialdehyde levels were measured. All antioxidant enzymes had significantly lower activity in the amikacin group (p ≤ 0.05) than in the control group. The difference in cochlear antioxidant enzyme activity between groups inversely correlated significantly with the change in ABR thresholds. The greatest correlation was for the high frequencies, which are most affected by aminoglycosides. This study demonstrates that antioxidant enzyme activity and amikacin-induced hearing loss significantly covary.

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