scholarly journals The Antioxidant Defense System during Lanzhou Lily Scales Storage Is Modulated by Hydrogen Sulfide

Horticulturae ◽  
2021 ◽  
Vol 7 (7) ◽  
pp. 183
Author(s):  
Changxia Li ◽  
Guibao Chen ◽  
Dengjing Huang ◽  
Ni Wang ◽  
Weibiao Liao

As an important gaseous regulator, hydrogen sulfide (H2S) is involved in various aspects of plant processes, including seed germination, stomatal movement, and postharvest senescence. The preservation capacity of Lanzhou lily (Lilium davidii var. unicolor Salisb) scales fumigated with or without exogenously applied sodium hydrosulfide (NaHS, a H2S donor) was investigated in the current study. Results indicate that NaHS fumigation was able to extend storage life and elicit endogenous H2S production of postharvest Lanzhou lily scales with an optimal concentration at 0.8 mM. Moreover, exogenously applied NaHS (0.8 mM) led to higher soluble sugar, soluble protein, and ascorbic acid levels and lower total phenolic and flavonoid contents compared with those of the control. The application of 0.8 mM NaHS also reduced the lipid peroxidation level and reactive oxygen species (ROS) accumulation in scales, as indicated by the lower malondialdehyde (MDA) content, relative conductivity, lipoxygenase (LOX) activity, O2− production rate, and hydrogen per-oxide (H2O2) content. Further, scales treated with 0.8 mM NaHS exhibited significantly higher activities of superoxide dismutase (SOD), catalase (CAT), peroxidase (POD), and ascorbic acid peroxidase (APX). Collectively, our data provide new insight into how the postharvest senescence of Lanzhou lily scales might be alleviated by H2S by enhancing antioxidant defense systems.

Author(s):  
Ceren Özer ◽  
Hatice Kalkan Yıldırım

Consumption of fermented products rich in antioxidants, anti-inflammatory, anti-diabetes, anti-obesity and anti-carcinogenic compounds is growing into a key strategy to fortify antioxidant defense system. Cabbage products produced by lactic-acid fermentation are chosen via their special microbiota. Considering these special medical properties of fermented-cabbage products as pickled cabbage, sauerkraut and kimchi were produced and evaluated. The data demonstrated that pickled cabbage (109.89±4.74 mg ascorbic acid/100 g d.w.) and its brine (208.14±17.29 mg ascorbic acid/100 g d.w.) exhibited the highest vitamin C content, followed by kimchi (77.42±2.87 mg ascorbic acid/100 g d.w.). The highest total phenolic content was detected in kimchi and sauerkraut with 869.64±70.16 and 438.257±25.05 mg gallic acid equivalents/100 g fresh weight (f.w.), respectively. 50% of the scavenging effect (EC50) values of free radical scavenging activity (DPPH) in kimchi 14.6 mg/ml, followed by sauerkraut (15.52 mg/ml) and pickled cabbage (18.88 mg/ml). Results demonstrated that fermented cabbage products have a great potential with content of bioactive compounds, high antioxidant features promising high beneficial impacts.


2018 ◽  
Vol 44 (4) ◽  
pp. 551-556
Author(s):  
Hua Zhao ◽  
Huiping Dai

Effects of drought stress were induced by polyethylene glycol (PEG-6000) (10, 20, and 30% ) for 2, 4, 6 and 8 days in Apocynum venetum L. seedlings with the potting method. The results showed that PEG significantly increased the activities of glutathione reductase (GR), superoxide dismutase (SOD), ascorbate peroxidase (APX), and the contents of electrolyte leakage rates, MDA, proline and soluble sugar were increased from 30% PEG. Thus, it was indicated that the application of exogenous 30% PEG induced oxidative damage by enhancing antioxidant defense systems.


Agriculture ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 12 ◽  
Author(s):  
Jiangtao Hu ◽  
Yali Li ◽  
Ya Liu ◽  
Dong Il Kang ◽  
Hao Wei ◽  
...  

Hydrogen sulfide (H2S) is endogenously produced in plant cells and plays an essential role in root development. Given its potential for future agricultural applications, the optimal concentration of sodium hydrosulfide (NaHS, an H2S donor) and the potential mechanisms for root development in the strawberry ‘Seolhyang’ were investigated in this study. The results showed that NaHS with a concentration of 1.250 mM had a positive effect on root development in strawberry. Further experiments showed that exogenous NaHS elevated the H2S content in the root. The dry root weight was increased by the 1.250 mM NaHS treatment, but was reduced by the hypotaurine (an H2S scavenger) treatment. Similar changes were found between H2S and soluble sugar contents, indicating that H2S enhanced the accumulation of soluble sugar. Therefore, it is suggested that the accumulation of soluble sugar induced by H2S is either directly or indirectly involved in root development in strawberry during plug production. Moreover, superoxide dismutase was shown to have contributed to the elevated H2O2 contents. These results contribute to our understanding of the role that H2S plays and some of the relevant mechanisms in which H2S regulates root development.


1989 ◽  
Vol 6 (1) ◽  
pp. 21-27 ◽  
Author(s):  
Ashwani KOUL ◽  
Krishan L. KHANDUJA ◽  
Indu B. KOUL ◽  
Mahesh P. GUPTA ◽  
Sabhiya MAJID ◽  
...  

Author(s):  
А.В. Муравьев ◽  
П.В. Михайлов ◽  
И.А. Тихомирова ◽  
Н. Антонова ◽  
А.А. Муравьев

Введение. Эритроциты — высокоспециализированные клетки, основной функцией которых является транспорт кислорода. Они лишены ядра и митохондрий, однако сохранили многие элементы молекулярных сигнальных путей. При выполнении транспортной функции эритроциты изменяют свои механические свойства и в том числе деформируются и объединяются в комплексы — агрегаты. Имеется ряд свидетельств того, что изменение механических свойств эритроцитов происходит под влиянием сигнальных молекул, к которым относятся и газовые медиаторы или газотрансмиттеры (ГТ). Это оксид азота, монооксид углерода и сульфид водорода. Цель исследования: изучение микрореологических ответов человеческих эритроцитов на действие ряда доноров газотрансмиттеров — оксида азота и сульфида водорода. Материалы и методы. После инкубирования эритроцитов с донорами оксида азота (спермином и нитропруссидом натрия) и донором сульфида водорода (гидросульфидом натрия) регистрировали деформируемость эритроцитов, их агрегацию и вязкость суспензий клеток (показатель гематокрита — 40%, вязкость суспензионной среды — 1,30 мПа × с; раствор Рингера и декстран‑200). Для уточнения механизмов действия ГТ на микрореологические свойства эритроцитов их инкубировали с ацетилхолином, серотонином и форсколином. Результаты. Установлено, что под влиянием ГТ происходят заметные изменения микромеханических свойств эритроцитов, которые статистически значимо изменялись под влиянием доноров оксида азота. Более существенные сдвиги микрореологии клеток, особенно их агрегацию, вызывал нитропруссид натрия. Гидросульфид натрия умеренно, но статистически значимо повышал деформируемость эритроцитов и заметно снижал их агрегацию, однако его эффекты уступали действию нитропруссида натрия. Заключение. На основании полученных данных и их анализа можно полагать, что внутриклеточными сигнальными путями для исследованных ГТ в эритроцитах при изменении их микромеханического состояния могут быть как ферменты гуанилатциклаза и аденилатциклаза, так и ионные каналы мембраны клетки. Introduction. Erythrocytes are highly specialized cells; oxygen transport is their main function. They have no nucleus and mitochondria, but they saved many elements of molecular signaling pathways. When erythrocytes performed the transport function they change their mechanical properties, deformed and combined into complexes — aggregates. There are some data that erythrocytes change their mechanical properties under the influence of signaling molecules such as gas mediators or gasotransmitters (GTs) — nitric oxide (NO), carbon monoxide and hydrogen sulfide. Aim: to study the microrheological responses of erythrocytes on the action of number GTs-donors — nitric oxide and hydrogen sulfide. Materials and methods. After erythrocytes incubation with NO-donors (spermine and sodium nitroprusside) and donor of hydrogen sulfide (sodium hydrosulfide) we registered erythrocytes deformability, their aggregation and viscosity of cell suspensions (hematocrit — 40%, viscosity of suspension medium — 1.30 mPa × s; Ringer’s solution and dextran‑200). To clarify the mechanisms of GTs action on microrheological properties of erythrocytes they were incubated with acetylcholine, serotonin and forskolin. Results. GTs noticeably changed erythrocytes micromechanical properties. Sodium nitroprusside caused significant shifts of erythrocytes microrheology, especially of erythrocytes aggregation. Sodium hydrosulfide moderately but statistically significant increased erythrocytes deformability and markedly reduced erythrocytes aggregation, but its effects were inferior to that of sodium nitroprusside. Conclusion. The study results suggest that guanylate cyclase and adenylate cyclase, as well as the ion channels of the cell membrane can be the intracellular signaling pathways in erythrocytes for investigated GTs.


2014 ◽  
Vol 62 (5) ◽  
pp. 1119-1129 ◽  
Author(s):  
Shi-Ping Li ◽  
Kang-Di Hu ◽  
Lan-Ying Hu ◽  
Yan-Hong Li ◽  
An-Min Jiang ◽  
...  

Author(s):  
Павел Георгиевич Осипов ◽  
Андрей Александрович Береш ◽  
Юрий Сергеевич Ханин ◽  
Олеся Игоревна Некрылова

Несмотря на достигнутые успехи в диагностике и лечении, на сегодняшний день проблема хронического простатита у пациентов с доброкачественной гиперплазией простаты продолжает оставаться актуальной. Тем временем, выздоровление или же стойкая ремиссия хронического простатита наступает только у 30-35% больных, которые получают традиционное лечение. В патогенезе хронического простатита важное место занимают мембранопатологические процессы, которые обусловлены активацией перекисного окисления липидов и нарушением состояния антиоксидантной системы защиты. У больных с хроническим простатитом и доброкачественной гиперплазией простаты наблюдается существенное усиление процессов липопероксидации на фоне сниженной функциональной способности антиоксидантных систем защиты организма. Поэтому равновесие в оксидантно-антиоксидантной системе является важным звеном в поддержании гомеостаза и, в частности, при патологии предстательной железы, предопределяет включение в комплексное лечение средств антиоксидантного действия. Перспективным можно считать применение препаратов с высоким содержанием биофлавоноидов и антиоксидантных витаминов. Включение в комплексное лечение таких пациентов препарата Кверцетина приводит к сокращению сроков нормализации клинико-лабораторных проявлений заболевания благодаря восстановлению равновесия между перекисным окислением липидов и состоянием антиоксидантной системы защиты Despite the successes achieved in the diagnosis and treatment, to date, the problem of chronic progression in patients with benign hyperplasia of the growth continues to remain relevant. Meanwhile, recovery or persistent remission of chronic prostatitis occurs only in 30-35% of patients who receive traditional treatment. In the pathogenesis of chronic prostatitis, membrane-pathological processes take an important place, which are caused by the activation of lipid peroxidation and impaired state of the antioxidant defense system. In patients with chronic prostate and benign hyperplasia, a significant increase in lipoperoxidation processes is observed against the background of a reduced functional ability of antioxidant defense systems. Therefore, the equilibrium in the oxidant-antioxidant system is an important link in the maintenance of homeostasis and, in particular, with the pathology of the prostate gland, allows the inclusion of antioxidant drugs in the complex treatment. The use of drugs with a high content of bioflavonoids and antioxidant vitamins can be considered promising. The inclusion of such patients in the complex treatment of the drug Quercetin leads to a reduction in the normalization period of the clinical and laboratory manifestations of the disease due to the restoration of the equilibrium between the peroxidation of the lipid peroxidation system and the state of lipid peroxidation


2020 ◽  
Vol 16 (7) ◽  
pp. 1083-1102
Author(s):  
Mohamed A. Shreadah ◽  
Nehad M.A. El Moneam ◽  
Samy A. El-Assar ◽  
Asmaa Nabil-Adam

Background: Aspergillus Versicolor is a marine-derived fungus isolated from Hyrtios Erectus Red Sea sponge. Methods: The aim of this study was to carry out a pharmacological screening and investigation for the in vitro biological activity (antioxidant, cholinergic, antidiabetic and anticancer) of Aspergillus Versicolor crude extract’s active compounds by using different qualitative and quantitative methods. Results: The present study results showed that Aspergillus Versicolor crude extracts contain 0.6 mg total phenolic/mg crude extract. Aspergillus Versicolor also showed a potent antioxidative capacity by decreasing the oxidation of ABTS. The anticancer and inhibitory effects of Aspergillus Versicolor crude extracts on PTK and SHKI were found to be 75.29 % and 80.76%; respectively. The AChE inhibitory assay revealed that Aspergillus Versicolor extracts had an inhibitory percentage of 86.67%. Furthermore, the anti-inflammatory activity using COX1, COX2, TNF, and IL6 was 77.32, 85.21 %, 59.83%, and 56.15%; respectively. Additionally, the anti-viral effect using reverse transcriptase enzyme showed high antiviral activity with 92.10 %. Conclusion: The current study confirmed that the Aspergillus versicolor crude extract and its active constituents showed strong effects on diminishing the oxidative stress, neurodegenerative damage, antiinflammatory, anti-cancer and anti-viral, suggesting their beneficial role as a promising fermented product in the treatment of cancer, oxidative stress, Alzheimer's, anti-inflammatory and anti-viral diseases.


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