Oxygen toxicity and antioxidative responses in arsenic stressed Helianthus annuus L. seedlings against UV-B

Yadav, Geeta; Srivastava, Prabhat Kumar; Parihar, Parul; Tiwari, Sanjesh; Prasad, Sheo Mohan

doi:10.1016/j.jphotobiol.2016.10.011

Cited by 18 publications

(11 citation statements)

References 52 publications

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“…It is known, that carotenoids are anti-stress pigments, shield chlorophyll from the miseries of light, excess of light or UV-B like harmful radiations and also act as antioxidants (Yadav et al 2016). The highest increase of carotenoids was detected for combined 3 kJ UV-B and drought stress effect in this experiment too.…”

Section: Discussionsupporting

confidence: 48%

The effect of foliar spray fertilizers on the tolerance of Hordeum vulgare to UV-B radiation and drought stress

Januškaitienė

Kacienė

2017

Cereal Research Communications

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The impact of foliar spray fertilizers (Aton Az) on the resistance of spring barley (Hordeum vulgare L.) against to individual and combined UV-B radiation and drought effects were investigated. Barley seeds were sown in pots prepared with neutral pH peat substrate. When the 2 nd true leaf unfolded, i.e. 7 days after germination, the first spray with microelement and free amino acid fertilizers was carried out; two days after this application, the different irradiation (1 and 3 kJm -2 d -1 ) UV-B doses and drought effects were started. Exposure lasted for 6 days. The main characteristics of all investigated indicators were assessed at the end of exposure. The largest positive effects of fertilizers on the photosynthetic rate and water use efficiency of barley were found solely under the impact of drought. Foliar spray fertilizers decreased oxidative stress injury in the leaves by decreasing the malondialdehyde content under solely effects of drought and UV-B radiation, while under the combined effect of the mentioned stress factors, the changes were statistically insignificant. A stronger positive impact of foliar fertilization was detected on the content of photosynthetic pigments (a and b) at solely UV-B radiation effect than at combined effect of investigated factors, when significant changes were detected only in individual cases.

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Section: Discussionsupporting

confidence: 48%

The effect of foliar spray fertilizers on the tolerance of Hordeum vulgare to UV-B radiation and drought stress

Januškaitienė

Kacienė

2017

Cereal Research Communications

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“…Under stressful biotic and abiotic conditions, enhanced formation of ROS attacks nucleic acids, photosynthetic pigments, proteins and lipids, as well as induces both cellular damage and protective responses (Caverzan et al, 2016;Lin and Kao, 2000). Plant cells contain a wide range of antioxidant enzymes, such as SOD, POD, CAT, and glutathione-Stransferase (GST), and nonenzymatic metabolites (e.g., Pro), which serve as ROS quenchers, thus protecting cells from oxidative damage (Yadav et al, 2016). MDA is a by-product of lipid peroxidation and an indicator of abiotic stress-induced oxidative damage in plants.…”

Section: Discussionmentioning

confidence: 99%

“…Among various antioxidants, superoxide dismutase (SOD) and peroxidase (POD) are enzymatic ones, while proline (Pro) is a nonenzymatic metabolite. These antioxidants all serve as ROS quenchers, thus protecting cells from oxidative damage (Yadav et al, 2016). The overproduction of ROS results in the accumulation of malondialdehyde (MDA) due to lipid peroxidation.…”

mentioning

confidence: 99%

Silencing of the SL-ZH13 Transcription Factor Gene Decreases the Salt Stress Tolerance of Tomato

Zhao¹,

Hu²,

Gao³

et al. 2018

J. Amer. Soc. Hort. Sci.

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Zinc finger-homeodomains (ZF-HDs) are considered transcription factors that are involved in a variety of life activities in plants, but their function in regulating plant salt stress tolerance is unclear. The SL-ZH13 gene is significantly upregulated under salt stress treatment in tomato (Solanum lycopersicum) leaves, per our previous study. In this study, to further understand the role that the SL-ZH13 gene played in the response process of tomato plants under salt stress, the virus-induced gene silencing (VIGS) method was applied to down-regulate SL-ZH13 expression in tomato plants, and these plants were treated with salt stress to analyze the changes in salt tolerance. The silencing efficiency of SL-ZH13 was confirmed by quantitative real-time PCR analysis. SL-ZH13-silenced plants wilted faster and sooner than control plants under the same salt stress treatment condition, and the main stem bending angle of SL-ZH13-silenced plants was smaller than that of control plants. Physiological analysis showed that the activities of superoxide dismutase, peroxidase, and proline content in SL-ZH13-silenced plants were lower than those in control plants at 1.5 and 3 hours after salt stress treatment. The malondialdehyde content of SL-ZH13-silenced plants was higher than that in control plants at 1.5 and 3 hours after salt stress treatment; H2O2 and O2- accumulated much more in leaves of SL-ZH13-silenced plants than in leaves of control plants. These results suggested that silencing of the SL-ZH13 gene affected the response of tomato plants to salt stress and decreased the salt stress tolerance of tomato plants.

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“…The decrease in the Chl a/b ratio observed at optimal N dose indicated that Chl a are more affected than Chl b. Previously, Yadav et al [27] showed that the inhibition in photosynthetic activities by accumulated As may be correlated with substitution of the central atom (Mg) of the chlorophyll molecule by As. Another reason could be a reduction in chlorophyll precursor levels under As exposure and/or reduced chlorophyll biosynthesis [27].…”

Section: Effects Of As On Wheat Plantsmentioning

confidence: 99%

“…Previously, Yadav et al [27] showed that the inhibition in photosynthetic activities by accumulated As may be correlated with substitution of the central atom (Mg) of the chlorophyll molecule by As. Another reason could be a reduction in chlorophyll precursor levels under As exposure and/or reduced chlorophyll biosynthesis [27]. The observed alterations in the Chl a/b ratio after As exposure could also be due to structural changes in the photosynthetic apparatus, i.e., reorganizations of the main pigment-protein complexes, which are reflected in the photosynthetic capacity [28].…”

Section: Effects Of As On Wheat Plantsmentioning

confidence: 99%

Effects of Nutrition on Wheat Photosynthetic Pigment Responses to Arsenic Stress

Maglovski¹,

Gerši²,

Rybanský³

et al. 2019

Pol. J. Environ. Stud.

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Arsenic is a serious soil pollutant with toxic effects on biological systems. Elevated soil concentrations may negatively affect crop production and food safety. The impact of arsenic on plants depends on many factors, including nitrogen availability. Nitrogen (N) as an essential mineral affects overall energetics of plants, while its non-optimal doses have been shown to also impact plant performance and yield, as well as tolerance to environmental constraints. The combined effects of these two factors, however, have been rarely studied. Here we investigated the impact of sublethal doses of As 3+ (5 mM) on wheat plants grown in hydropony, applying a set of 8 different N concentrations spanning from starvation (0 mM N in the media) through optimum (7.5 mM N) to excessive amounts (up to 35 mM N). The results showed that the content of photosynthetic pigments varies depending on N concentration and As 3+ presence. The different energetic status of plants also affected the final As uptake. Establishing nutrition conditions might be important for limiting metal(loid) uptake from soil in contaminated areas.

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Oxygen toxicity and antioxidative responses in arsenic stressed Helianthus annuus L. seedlings against UV-B

Cited by 18 publications

References 52 publications

The effect of foliar spray fertilizers on the tolerance of Hordeum vulgare to UV-B radiation and drought stress

The effect of foliar spray fertilizers on the tolerance of Hordeum vulgare to UV-B radiation and drought stress

Silencing of the SL-ZH13 Transcription Factor Gene Decreases the Salt Stress Tolerance of Tomato

Effects of Nutrition on Wheat Photosynthetic Pigment Responses to Arsenic Stress

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