Physiological, photochemical and ionic responses of sunflower seedlings to exogenous selenium supply under salt stress

Habibi, Ghader

doi:10.1007/s11738-017-2517-3

Cited by 41 publications

(19 citation statements)

References 54 publications

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“…Se applications decreased H 2 O 2 and MDA contents, as well as membrane damage, compared with unsprayed controls ( Figure 4 and Figure 5 ). This is in accordance with the findings of Djanaguiraman et al [ 5 ] in soybean and sorghum and Habibi [ 25 ] in sunflower.…”

Section: Discussionsupporting

confidence: 93%

Selenium Improves Physiological Parameters and Alleviates Oxidative Stress in Strawberry Seedlings under Low-Temperature Stress

Chongping

Qin

Sun

et al. 2018

IJMS

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Here, we investigated the effects of selenium (Se) applications on two strawberry varieties, Akihime and Benihoppe, under chilling stress and recovery conditions. Changes in photosynthetic parameters, antioxidant enzyme activities, ascorbate (AsA)-glutathione (GSH) cycle-related enzyme activities, and low-molecular-mass antioxidant contents were determined. Foliar spraying with Se alleviated the decline in the net photosynthetic rate and chlorophyll content and increased the malondialdehyde and hydrogen peroxide contents of strawberry seedlings’ leaves under chilling stress. As the time under chilling stress increased, the stomatal conductance decreased and intercellular CO2 concentration increased, suggesting that nonstomatal factors had major limiting effects on the net photosynthetic rate’s decrease. Se applications significantly alleviated the adverse impacts of chilling stress on changes in stomatal conductance and intercellular CO2 concentration. Se, especially at lower concentrations, significantly increased superoxide dismutase, catalase, and peroxide enzyme activities during chilling stress. Approximately 5 mg·L−1 of sodium selenite solution had the greatest stress-alleviating effects. Among the AsA-GSH cycle-related enzymes, ascorbate peroxidase, glutathione reductase, dehydroascorbate reductase, and monodehydroascorbate reductase (MDHAR) treatments, coupled with an appropriate dose of Se, significantly enhanced ascorbate peroxidase and MDHAR activities, which suggested that Se applications played important roles in strawberry leaves by affecting AsA-GSH cycle-related defenses against the oxidative damage caused by chilling stress. Furthermore, MDHAR was the key enzyme required to maintain the balance between AsA consumption and regeneration that may assist in protecting strawberry seedlings in a low-temperature environment.

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Section: Discussionsupporting

confidence: 93%

Selenium Improves Physiological Parameters and Alleviates Oxidative Stress in Strawberry Seedlings under Low-Temperature Stress

Chongping

Qin

Sun

et al. 2018

IJMS

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“…In addition, ESseed had an indirect effect on yield by altering leaf growth in subsequent growth stages because no biomass was partitioned to storage organs in the seedling stage [62,63]. However, our findings regarding ESseed differed from those of previous studies [18,46,64,65]. For example, Feddes-type stress reduction functions (Equations (2) and (3)) indicated that 6 of the 14 micro-plots experienced salt stress, whereas no micro-plots experienced water stress during the seedling stage.…”

Section: Environmental Stresses In Different Growth Periodscontrasting

confidence: 87%

Testing and Improving the WOFOST Model for Sunflower Simulation on Saline Soils of Inner Mongolia, China

Zhu

Zeng

et al. 2018

Agronomy

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Monitoring and improving environmental stress in crops is vital for the sustainable development of agriculture and food security. Traditional experimental methods are costly and time-consuming, yet crop growth models focus mainly only on water and nutrient stresses. In this study, a new World Food Studies (WOFOST) model, WOFOST-ES, was developed by the addition of a general environmental stress factor (ES). To calibrate and validate WOFOST-ES, two-year micro-plot experiments and one-year field experiments with sunflower were conducted in the Hetao Irrigation District, China. The results of the micro-plot experiments indicated that the WOFOST model failed to simulate sunflower growth correctly but that the WOFOST-ES model was highly accurate in simulating both yield (R2 = 0.99, root mean square error (RMSE) = 56 kg/ha) and leaf area index (LAI) (R2 = 0.86, RMSE = 0.44). A statistical method for estimating ESs based on the dominant stress factor (salt at our study site) was also proposed as a supplemental tool for WOFOST-ES, and micro-plot and field experiments conducted in 2013 and 2017 both proved acceptable accuracy of the statistical method when using WOFOST-ES. Comparison between ESs and the water and salt stress factors of Feddes-type stress reduction functions indicated that ESs failed to reveal actual environmental stresses during the sunflower seeding stage but did reflect other environmental stresses in addition to water and salt during the bud, flowering, and maturity stages. Although the present WOFOST-ES model proved to be accurate, stable, and practical, future studies should be performed, focusing on the physical separation of ESs, their mechanistic quantification, and their evaluation at small time steps using more observations.

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“…Typical beneficial effects of Se described in food crops growing in salinized environments generally include the improvement of agronomic traits (e.g. shoot length, shoot diameter, fresh and dry biomass) (Diao et al 2014 ; Hawrylak-Nowak 2009 ; Hasanuzzaman et al 2011 ; Jiang et al 2017 ), the increase of net photosynthesis and water contents (Diao et al 2014 ; Habibi 2017 ; Hawrylak-Nowak 2009 ; Jiang et al 2017 ), the stimulation of antioxidant processes and accumulation of non-enzymatic antioxidants (AsA GSH, phenolic compounds), accumulation of osmolytes (proline, sugars and K + ), the reduction of lipid peroxidation and ROS concentration in cells, and the regulation of Na + homeostasis through increased expression of genes encoding Na + /H + antiporters (NHX), as reported in maize ( ZmNHX1 ) and rice ( OsNHX1 ), which results in enhanced sequestration of Na + in the root vacuoles to prevent Na + delivery to the shoot (Ashraf et al 2018 ; Elkelish et al 2019 ; Habibi 2017 ; Hasanuzzaman et al 2011 ; Hawrylak-Nowak 2009 ; Kamran et al 2019 ; Jiang et al 2017 ; Subramanyam et al 2019 ). Under certain circumstances, the positive action of Se in salt stress physiology could be intensified by giving this element along with silicon (Si) (Sattar et al 2017 ).…”

Section: Selenium Biofortification In the Context Of Global Environmementioning

confidence: 99%

Selenium biofortification in the 21st century: status and challenges for healthy human nutrition

et al. 2020

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Background Selenium (Se) is an essential element for mammals and its deficiency in the diet is a global problem. Plants accumulate Se and thus represent a major source of Se to consumers. Agronomic biofortification intends to enrich crops with Se in order to secure its adequate supply by people. Scope The goal of this review is to report the present knowledge of the distribution and processes of Se in soil and at the plant-soil interface, and of Se behaviour inside the plant in terms of biofortification. It aims to unravel the Se metabolic pathways that affect the nutritional value of edible plant products, various Se biofortification strategies in challenging environments, as well as the impact of Se-enriched food on human health. Conclusions Agronomic biofortification and breeding are prevalent strategies for battling Se deficiency. Future research addresses nanosized Se biofortification, crop enrichment with multiple micronutrients, microbial-integrated agronomic biofortification, and optimization of Se biofortification in adverse conditions. Biofortified food of superior nutritional quality may be created, enriched with healthy Se-compounds, as well as several other valuable phytochemicals. Whether such a food source might be used as nutritional intervention for recently emerged coronavirus infections is a relevant question that deserves investigation.

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Physiological, photochemical and ionic responses of sunflower seedlings to exogenous selenium supply under salt stress

Cited by 41 publications

References 54 publications

Selenium Improves Physiological Parameters and Alleviates Oxidative Stress in Strawberry Seedlings under Low-Temperature Stress

Selenium Improves Physiological Parameters and Alleviates Oxidative Stress in Strawberry Seedlings under Low-Temperature Stress

Testing and Improving the WOFOST Model for Sunflower Simulation on Saline Soils of Inner Mongolia, China

Selenium biofortification in the 21st century: status and challenges for healthy human nutrition

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