Silicon alleviates oxidative damage of wheat plants in pots under drought

Gong, Haijun; Zhu, Xike; Chen, Kun-Ming; Wang, Suo-Min; Chenglie, Zhang

doi:10.1016/j.plantsci.2005.02.023

Cited by 693 publications

(465 citation statements)

References 41 publications

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“…The amount of total anthocyanin contents was calculated in the original sample and expressed as mg g -1 dry weight of a leaf. Superoxide dismutase (SOD) was assayed using the procedure given by Gong et al (2005) with minor modifications. The reaction solution (3 ml) contained 50 µM nitroblue tetrazolium (NBT), 1.3 µ M riboflavin, 13 mM methionine, 75 mM ethylenediaminetetraacetic acid, 50 mM potassium phosphate buffer (pH 7.8) and 20-50 ml of enzyme extract.…”

Section: Methodsmentioning

confidence: 99%

Heat shock increases oxidative stress to modulate growth and physico-chemical attributes in diverse maize cultivars

Hussain

Ashraf

Rasheed

et al. 2016

International Agrophysics

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A b s t r a c t. The present investigation was conducted to appraise the physiochemical adjustments in contrasting maize cultivars, namely, PakAfgoi (tolerant) and EV-5098 (sensitive) subjected to heat shock. Seven-day-old seedlings were exposed to heat shock for different time intervals (1, 3, 6, 24, 48 and 72 h) and data for various physiochemical attributes determined to appraise time course changes in maize. After 72 h of heat shock, the plants were grown under normal conditions for 5 d and data for different growth attributes and photosynthetic pigments recorded. Exposure to heat shock reduced growth and photosynthetic pigments in maize cultivars. The plants exposed to heat shock for up to 3 h recovered growth and photosynthetic pigments when stress was relieved. A time course rise in the relative membrane permeability, hydrogen peroxide (H 2 O 2 ) and malondialdehyde contents was recorded particularly in the EV-5098 indicating that heat shock-induced oxidative stress. Activities of different enzymatic antioxidants greatly altered due to heat shock. For instance, an increase in superoxide dismutase activity was recorded in both maize cultivars. The activity of ascorbate peroxidase was greater in Pak-Afgoi. However, the peroxidase and catalase activities were higher in plants of . Heat shock caused a significant rise in the proline and decline in the total free amino acids. Overall, the performance of Pak-Afgoi was better in terms of having lesser oxidative damage and greater cellular levels of proline. The results suggested that oxidative stress indicators (relative membrane permeability, H 2 O 2 and malondialdehyde) and proline can be used as markers for heat shock tolerant plants.

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Section: Methodsmentioning

confidence: 99%

Heat shock increases oxidative stress to modulate growth and physico-chemical attributes in diverse maize cultivars

Hussain

Ashraf

Rasheed

et al. 2016

International Agrophysics

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show abstract

“…SOD was assayed by the nitroblue tetrazolium (NBT) method as described by Gong et al (2005). The reaction mixture (3 mL) contained 50 mM K-phosphate buffer, pH 7.3, 13 mM methionine, 75 mM NBT, 0.1 mM EDTA, 4 mM riboflavin and enzyme extract (0.2 mL).…”

Section: Analysesmentioning

confidence: 99%

Salt-Induced Changes in Antioxidative Enzyme Activities in Shoot Tissues of Two Atriplex Varieties

Kachout¹,

Hamza²,

Bouraoui³

et al. 2013

Not Bot Hort Agrobot Cluj

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This study examined the influence of salt levels on antioxidant activity and content of carotenoids and anthocyanins of the A. hortensis leaves using two varieties: green orach (var. purpurea) and red orach (var. rubra). Seeds of Atriplex were exposed to 0, 90, 180 and 260 mM NaCl for 3 months and seeds were sown in an earthen pot. Overall levels of ascorbate peroxidase (APX) and glutathione reductase (GR) activity were significantly elevated. Salt stress caused a significant decline in tissue concentrations of catalase (CAT) and superoxide dismutase (SOD). However, 90 mM NaCl did not modify these parameters, which remains similar to control values. Activities of APX and CAT were increase whether the shoots of A. hortensis var. purpurea were grown in the presence of 180 mM NaCl. Thus although some indications of oxidative stress accompany exposure of this salt-tolerant Atriplex varieties to salinity, mechanisms appear to exist within its shoot tissue to permit the tolerance of such oxidative stress. High salt concentration in the culture medium provokes oxidative damage in Atriplex leaves and induces a general increase in antioxidant enzyme activity. In particular, NaCl toxicity decreased content of carotenoids. It also decreased the concentration of anthocyanin pigments in leaves of Atriplex. This work therefore provides a starting point towards a better understanding of the role of antioxidant enzyme in the plant response against salt stress.

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“…Kohler et al [54] also observed that, under salt stress conditions, there was reduced activity of catalase enzyme in lettuce seedlings inoculated with Pseudomonas bacteria compared to control treatment. In the same vein, studying the use of silicon in reducing the oxidative stresses of wheat, Gong et al [55] stated that silicon could reduce stress-induced damage by increasing catalase activity. These results are inconsistent with the results of this study.…”

Section: Plant Biomassmentioning

confidence: 99%

Influence of Exopolysaccharide-Producing Bacteria and SiO2 Nanoparticles on Proline Content and Antioxidant Enzyme Activities of Tomato Seedlings (Solanum lycopersicum L.) under Salinity Stress

Isfahani¹,

Tahmourespour²,

Hoodaji³

et al. 2018

Pol. J. Environ. Stud.

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A greenhouse experiment was conducted to evaluate the effects regarding inoculation of exopolysaccharide (EPS)-producing bacterium, the extracted EPS and silicon nanoparticles on Solanum lycopersicum L. seeds under salinity stress, in a completely randomized factorial design with three replicates. The inoculated seeds with silicon nanoparticles (8 gr L -1 ), bacterial EPS (0.01 M), and 1 mL of bacterial suspension (1×10 8 CFU mL -1 ) were sown in pots and irrigated with water at different salinity levels (0.3, 2, 4, 6, and 8 dS m -1 ). Results showed that treatment application could enhance salinity tolerance of tomato seeds and improve plant growth so that combined treatments of EPS and silicon nanoparticles (S.E.N), bacteria and silicon nanoparticles (S.B.N), and EPS with silicon nanoparticles and bacteria (S.E.B.N) were the best treatments for plant growth and improvement regarding salinity levels. The mentioned treatments significantly (p<0.01) increased root and shoot fresh or dry weight in comparison to the control sample. In addition, treatments significantly (p<0.01) decreased proline content and antioxidant enzyme activities. Thus, it can be concluded that applied treatments are suitable for agricultural and environmental applications and bring about less damage caused by salinity stress.

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Silicon alleviates oxidative damage of wheat plants in pots under drought

Cited by 693 publications

References 41 publications

Heat shock increases oxidative stress to modulate growth and physico-chemical attributes in diverse maize cultivars

Heat shock increases oxidative stress to modulate growth and physico-chemical attributes in diverse maize cultivars

Salt-Induced Changes in Antioxidative Enzyme Activities in Shoot Tissues of Two Atriplex Varieties

Influence of Exopolysaccharide-Producing Bacteria and SiO2 Nanoparticles on Proline Content and Antioxidant Enzyme Activities of Tomato Seedlings (Solanum lycopersicum L.) under Salinity Stress

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