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Exogenous nitric oxide protects against salt-induced oxidative stress in the leaves from two genotypes of tomato (Lycopersicom esculentum Mill.)

100%

Wu X., Zhu W., Zhang H., Ding H., Zhang H. J.

Acta Physiologiae Plantarum

2011

tom 33

nr 4

Nitric oxide (NO) has emerged as a key molecule involved in many physiological events in plants. To characterize roles of NO in tolerance of tomato (Lycopersicom esculentum Mill.) to salt stress, the protective effects of NO against salt-induced oxidative stress in the leaves of tomato cultivar Hufan1480 (salt-tolerant) and Hufan2496 (salt-sensitive) were evaluated. Under salt stress, Hufan1480 showed higher biomass accumulation, and less oxidative damage when compared with the Hufan2496. Application of exogenous sodium nitroprusside, a NO donor, dramatically alleviated growth suppression induced by salt stress in two tomato ecotypes, reflected by decreased malondialdehyde and O₂⁻ production. Furthermore, the antioxidant enzymes superoxide dismutase, guaiacol peroxidase, catalase and ascorbate peroxidase, the antioxidant metabolites ascorbate and reduced glutathione, and the osmosis molecules proline and soluble sugar were increased in both ecotypes in the presence of NO under salt stress. Therefore, the protective effect of NO against salt-induced oxidative damages in tomato seedlings is most likely mediated through stimulation of antioxidant system.

Effect of an essential oils blend on growth performance, and selected parameters of oxidative stress and antioxidant defence of Escherichia coli challenged piglets

86%

Jiang X. R., Li X. L., Awati A., Bento H., Zhang H. J., Bontempo V.

Journal of Animal and Feed Sciences

2017

tom 26

nr 1

This study evaluated the effect of diet supplementation with an essential oil blend (13.5% thymol and 4.5% cinnamaldehyde, EO) on growth performance and selected parameters of oxidative stress and antioxidant defence in Escherichia coli challenged piglets. Ninety-six weaned piglets were allocated into 4 experimental treatments (6 replicates per treatment with 4 piglets per replicate) for 35 days arranged in a 2×2 factorial design: diet [a basal diet without additive (CT) or with 50 mg · kg−1 EO] and E. coli challenge [sham (−) or infected (+)]. On day 8, half of the piglets from each dietary group was orally inoculated with 4 ml of E. coli O149:F4 (K88). The E. coli challenge increased the level of malondialdehyde (MDA) in piglet serum on day 9 (P < 0.01), and tended to reduce average daily feed intake (P = 0.08) and average daily gain (P = 0.08) from day 7 to day 35. Dietary EO addition did not affect growth performance but tended to reduce MDA content in piglet serum in comparison with CT group on day 9 (P = 0.07). Neither EO addition nor E. coli challenge influenced antioxidative enzymes (superoxide dismutase and glutathione peroxidase) activity. The obtained results suggest that EO rich in thymol and cinnamaldehyde had tendency to reduce serum lipid peroxidation level by EO addition, however no such effect was observed in piglets challenged by E. coli. So, further studies are needed to confirm the EO influence on systemic antioxidant defence of weaned piglets.

The effect of plant polyphenols on the antioxidant defence system of weaned piglets subjected to an Escherichia coli challenge

72%

Jiang X. R., Zhang H. J., Montovani G., Alborali G. L., Caputo J. M., Savoini G., Dell'Orto V., Bontempo V.

Journal of Animal and Feed Sciences

2014

tom 23

nr 4

The goal of this study was to evaluate the effect of an optimized plant polyphenol (PP) mixture consisting of polyphenols extracted from apples, grape seeds, green teas and olive leaves on the systemic antioxidant capacity in piglets orally challenged with Escherichia coli (E. coli). A total of 24 piglets were weaned at 28 days and allocated to 4 groups for a 42-d experiment with a 2 × 2 factorial design comparing different dietary treatments [a basal diet without (CTR) or with 0.1% of the optimized PP mixture (PP)] and oral E. coli challenges on days 21 and 25 (saline or E. coli). On days 25, 27 and 34 of the trial, one piglet from each pen was selected for blood sampling. The E. coli challenge decreased the gain-to-feed ratio (G:F) from day 21 to day 42 (P < 0.10), reduced plasma superoxide anion (SAIC) and hydroxyl radical (HRIC) inhibiting capacities, and increased the plasma ceruloplasmin content on day 27 (P < 0.10). PP supplementation increased the G:F ratio from day 21 to day 42 (P < 0.10). Compared with the CTR diet, PP supplementation increased plasma GSH-Px activity on day 25 and plasma T-AOC activity on day 27 (P < 0.10), and dietary PP increased plasma SAIC on day 27 and plasma HRIC on day 34 (P < 0.10). These results suggest that PP supplementation may improve the antioxidant status of post-weaning piglets and counteract some of the negative effects that occur when piglets are challenged with E. coli.

Ograniczanie wyników

2 Journal of Animal and Feed Sciences

1 Acta Physiologiae Plantarum

3 Zhang H. J.

2 Bontempo V.

2 Jiang X. R.

1 Alborali G. L.

1 Awati A.

1 Bento H.

1 Caputo J. M.

1 Dell'Orto V.

1 Ding H.

1 Li X. L.

1 Montovani G.

1 Savoini G.

1 Wu X.

1 Zhang H.

1 Zhu W.

1 2017

1 2014

1 2011

Wyniki wyszukiwania

Exogenous nitric oxide protects against salt-induced oxidative stress in the leaves from two genotypes of tomato (Lycopersicom esculentum Mill.)

Effect of an essential oils blend on growth performance, and selected parameters of oxidative stress and antioxidant defence of Escherichia coli challenged piglets

The effect of plant polyphenols on the antioxidant defence system of weaned piglets subjected to an Escherichia coli challenge