Influence of selenium on root morphology and photosynthetic characteristics of winter wheat under cadmium stress

Qin, Xiaoming; Nie, Zhaojun; Liu, Hongen; Zhao, Peng; Qin, Shiyu; Shi, Zhiwei

doi:10.1016/j.envexpbot.2018.03.024

Cited by 90 publications

(29 citation statements)

References 25 publications

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“…The heavy metal Cd is easily transferred from soil to plants under Cd stress. Studies have reported that the use of inorganic Se decreased Cd uptake in tomato [ 21 ], pakchoi [ 30 ], wheat [ 31 ], and other plants [ 10 , 32 ]. In this study, the addition of Nano-Se, Se (IV), and SeMet significantly reduced the Cd content in rice tissues (shoots and roots), and this effect was pronounced with the SeMet application.…”

Section: Discussionmentioning

confidence: 99%

Effect of Different Forms of Selenium on the Physiological Response and the Cadmium Uptake by Rice under Cadmium Stress

Yan

Qin

et al. 2020

IJERPH

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Cadmium (Cd) is a pollutant toxic to plants and a potential threat to human health. Selenium (Se), though not essential for plants, has beneficial effects on plants under abiotic stress. A hydroponic experiment was conducted to investigate the impact of different forms of Se (Nano-Se, selenite, selenate, and SeMet) on accumulation, subcellular distribution, and chemical forms of Cd, as well as oxidative stress in rice seedlings. Cd (20 μmol·L−1) treatment significantly decreased biomass accumulation and chlorophyll content. The application of all Se forms, except selenate, mitigated the adverse effects of Cd on growth and chlorophyll content. The application of selenite, Nano-Se, and SeMet decreased root and shoot Cd concentrations as well as root-to-shoot Cd translocation in rice seedlings. Selenate application decreased shoot Cd concentration and root-to-shoot Cd translocation with no effect on root Cd concentration. Accordingly, Se increased the sequestration of Cd in the cell wall and vacuoles and decreased the active chemical form of Cd in rice seedlings. SeMet was the most effective supplement that decreased Cd concentration and enhanced Se concentration in the roots and shoots of rice seedlings. All forms of Se further enhanced catalase (CAT) and glutathione peroxidase (GSH-Px) activities and inhibited MDA accumulation. To conclude, Se influenced Cd accumulation and translocation in rice seedlings by altering the subcellular distribution, chemical forms, and antioxidant defense system under Cd stress. These effects were highly significant with SeMet treatment, probably due to better absorption and utilization by the plant.

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Section: Discussionmentioning

confidence: 99%

Effect of Different Forms of Selenium on the Physiological Response and the Cadmium Uptake by Rice under Cadmium Stress

Yan

Qin

et al. 2020

IJERPH

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“…Manuscript to be reviewed exposure. Excessive Cd stress significantly increased the root average diameters in peanuts (Lu et al 2013), soybean (Wang et al 2016), and winter wheat (Qin et al 2018). Increased root diameter under Cd stress is interpreted as compensatory growth, and might be the consequence of altered root development involving xylogenesis, premature endodermis differentiation, and lignification of cortical and stelar tissues.…”

Section: Discussionmentioning

confidence: 98%

Peer Review #1 of "Evaluation of three wheat (Triticum aestivum L.) cultivars as sensitive Cd biomarkers during the seedling stage (v0.1)"

2020

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Sensitive seedling crops have been developed to monitor Cd contamination in agricultural soil. In present study, eighteen parameters involving growth conditions and physiological performances were assessed to evaluate Cd-responses of three wheat (Triticum aestivum L.) cultivars, Xihan1 (XH), Longzhong1 (LZ), and Dingfeng16 (DF). Principle component analysis illustrated that Factor 1, representing growth performance, soluble sugar content, and catalase activity, responded to the Cd treatment in a dose dependent manner, while Factor 2 represented by chlorophyll content and germinating root growth was mainly dependent on cultivar differences. Higher inhibition rates were observed in growth performance than in physiological responses, with the highest inhibition rates of shoot biomasses (39.6%), root length (58.7%), root tip number (57.8%), and bifurcation number (83.2%), even under the lowest Cd treatment (2.5 mg•L-1). According to the Cd toxicity sensitivity evaluation, DF exerted higher tolerance to Cd stress in root growth while LZ was more sensitive to Cd stress, suggesting LZ as an ideal Cd contaminant biomarker. This study will provide novel insight into the cultivar-dependent response during using wheat seedlings as Cd biomarkers.

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“…However, Ding et al [25] found that the addition of 0.8 mg L − 1 Se to the treatments containing 4 mg L − 1 Cd increased the root length, surface area, volume, and average diameter of rice. The root morphology have a great in uence on the absorption of minerals [5]. And the ne root are the most active part of the root system for mineral absorption [26].…”

Section: Discussionmentioning

confidence: 99%

“…Although Cd has no essential biological function in plants, the accumulation of Cd in plants will produce obvious toxic effects, including destroying chlorophyll, inhibiting photosynthesis and crop growth and development, reducing yield and quality [5]. The intracellular and extracellular mechanisms for detoxi cation in plants have gradually developed in the process of adapting to heavy metal stress.…”

Section: Introductionmentioning

confidence: 99%

1 Selenium Supply Alters Subcellular Distribution and Chemical Forms of Cadmium and Expression of Transporter Genes Involved in Cadmium Uptake and Translocation in Winter Wheat (Triticum Aestivum)

Zhu

Zhao

Nie

et al. 2020

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Background Cadmium (Cd) accumulation in crops will affect the yield and quality of crops, and also harm human health. The application of selenium (Se) can reduce the absorption and transport of Cd in winter wheat. Results The result showed that increasing Se supply significantly decreased Cd concentration and accumulation in shoots and roots of winter wheat, and the root to shoot translocation of Cd. The Se supply increased the root length, surface area and root volume, but decreased the root average diameter. Increasing Se supply significantly decreased Cd concentration in cell wall, soluble fraction and cell organelle in roots and shoots. An increase of Se supply inhibited Cd distribution in the organelle of shoot and root, but enhanced Cd distribution in the soluble fraction of shoot and the cell wall of root. The Se supply also decreased the proportion of active Cd (ethanol-extractable (FE) Cd and deionized water-extractable (FW) Cd) in roots. In addition, the expression of TaNramp5-a, TaNramp5-b, TaHMA3-a, TaHMA3-b and TaHMA2 were significantly increased with the increase of Cd concentration in roots, and the expression of TaNramp5-a, TaNramp5-b and TaHMA2 in roots were down-regulated by increasing Se supply, regardless of Se supply or Cd stress, respectively. The expression of TaHMA3-b in root was significantly down-regulated by Se10 treatment at both Cd5 and Cd25 but up-regulated by Se5 treatment at Cd25. The expression of TaNramp5-a, TaNramp5-b, TaHMA3-a, TaHMA3-b and TaHMA2 in shoot were down-regulated by increasing Se supply at Cd5, and Se5 treatment up-regulated the expression of those genes in shoot at Cd25. Conclusions The results confirm that Se application limit Cd accumulation in wheat via regulating subcellular distribution and the chemical forms of Cd in tissues of winter wheat, as well as the expression of TaNramp5-a, TaNramp5-b and TaHMA2 in root.

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Influence of selenium on root morphology and photosynthetic characteristics of winter wheat under cadmium stress

Cited by 90 publications

References 25 publications

Effect of Different Forms of Selenium on the Physiological Response and the Cadmium Uptake by Rice under Cadmium Stress

Effect of Different Forms of Selenium on the Physiological Response and the Cadmium Uptake by Rice under Cadmium Stress

Peer Review #1 of "Evaluation of three wheat (Triticum aestivum L.) cultivars as sensitive Cd biomarkers during the seedling stage (v0.1)"

1 Selenium Supply Alters Subcellular Distribution and Chemical Forms of Cadmium and Expression of Transporter Genes Involved in Cadmium Uptake and Translocation in Winter Wheat (Triticum Aestivum)

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