Cloroplast pigments as indicators of lead stress

Gomes, Silvânia M. de S.; Lima, Vera Lúcia Antunes de; Souza, Adaílson Pereira de; Nascimento, Joab Josemar Vitor Ribeiro do; Nascimento, Everaldo Silva do

doi:10.1590/s0100-69162014000500007

Cited by 10 publications

(12 citation statements)

References 19 publications

(24 reference statements)

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“…In the roots, the Mg contents showed a negative quadratic behavior and decreased dramatically (by 58%) only in the 0.8 mM Pb treatment. This reduction in the Mg levels could be related to a reduction in the levels of chlorophyll a and b, observed in several species grown in the presence of Pb (GOMES et al, 2014).…”

Section: Macronutrient (N P K Ca and Mg) Concentrationsmentioning

confidence: 89%

Nutritional and biochemical changes induced by lead in sunflower (Helianthus annuus L.)

Abreu

Sacramento

Alves

et al. 2016

SCA

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The aim of this study was to evaluate the effects of increasing concentrations of lead (Pb) in the nutrient solution on growth and macronutrient and organic solute contents of Helianthus annuus plants. The experimental design was completely randomized with four replications. The dry mass yield was not affected by the treatments up to a Pb concentration of 0.6 mM, indicating that H. annuus was tolerant to this Pb concentration in the growth medium. The reductions in leaf, stem and root dry masses at a Pb concentration of 0.8 mM were 74, 84 and 85%, respectively. Lead stress did not reduce the levels of nitrogen (N), phosphorus (P) and potassium (K), indicating that the growth reduction observed at 0.8 mM Pb could not be attributed to deficiencies of these nutrients. On the other hand, Pb significantly reduced calcium (Ca) and magnesium (Mg) contents in leaves, stems and roots, which might, at least in part, explain the Pb-induced growth reduction in the H. annuus plants. Pb increased soluble carbohydrate, free amino acid and proline contents in leaves, and soluble protein and proline contents in roots, showing stress-induced changes in cell metabolism. The data also suggest that Ca and Mg concentrations may be used as nutritional indicators and the proline content may be used as a biochemical indicator of Pb toxicity in H. annuus.

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Section: Macronutrient (N P K Ca and Mg) Concentrationsmentioning

confidence: 89%

Nutritional and biochemical changes induced by lead in sunflower (Helianthus annuus L.)

Abreu

Sacramento

Alves

et al. 2016

SCA

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“…In addition, carotenoids levels were also significantly affected when these macrophytes were exposed to 100 ± 1 µM Cu. Carotenoids are also essential to photosynthesis, acting as secondary photosynthetic pigments [43]. By contrast, carotenoids content increased in leaves of S. biloba after 48 h exposure to both 50 ± 2 µM and 100 ± 1 µM Cd.…”

Section: Evaluation Of Metal Phytotoxicity In S Bilobamentioning

confidence: 97%

Variations in the Phytoremediation Efficiency of Metal-polluted Water with Salvinia biloba: Prospects and Toxicological Impacts

Emiliani

Oyarce

Bergara

et al. 2020

Water

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The occurrence of heavy metals in industrial wastewater is unanimously considered a major concern since these pollutants cannot be chemically or biologically degraded and therefore have long residence times. Phytoremediation is one of the most widespread biotechnological applications worldwide, which consists in the use of plants to adsorb or accumulate a broad range of inorganic and organic contaminants from water, air, and soil. To improve the cost-effectiveness and sustainability of phytoremediation-based wastewater treatment systems, it is essential to use plants that are not only efficient in pollutants removal, but also abundant and easily accessible at the target site, requiring no-special culture conditions. In this study, we have evaluated the capacity of naturally-occurring aquatic macrophytes of the genus Salvinia (classified as Salvinia biloba) to phytoremediate water artificially contaminated with cadmium (Cd), copper (Cu), lead (Pb), or zinc (Zn) at equal molar concentrations (50 ± 2 and 100 ± 1 µM), during 48 h. Additionally, photosynthetic and antioxidant pigments (carotenoids, chlorophylls, anthocyanins, and flavonoids), and soluble carbohydrate content was also measured in floating leaves of Salvinia specimens to appraise heavy metals phytotoxicity. Elemental analyses to plant tissue indicate that S. biloba was able to bioconcentrate all four metals analyzed, albeit with different degrees of affinity. In addition, the mechanisms of uptake and detoxification were dissimilar for each ion, resulting in greater removal of Cu and Pb (≥96%, at both concentrations), in comparison to Cd (79 ± 4% and 56 ± 2% for 50 ± 2 and 100 ± 1 µM, respectively) and Zn (77 ± 5% and 70 ± 4% for 50 ± 2 and 100 ± 1 µM, respectively). Accordingly, the assessment of the selected physiological parameters in floating leaves suggests that different response mechanisms are triggered by each metal in S. biloba to counteract the corresponding toxicological stress.

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“…Plants respond to environmental adversities, so can be used as indicators for assessing the environment quality. In this regard, the biochemical parameters such as contents of photosynthetic pigments are used as reliable indicators of the pollutants toxicity in plants (Gomes et al, 2014). Vehicular pollution caused deleterious effects on C. procera in this study.…”

Section: Discussionmentioning

confidence: 94%

Physio-biochemical responses of apple-of-sodom [Calotropis procera (Aiton) W. T. Aiton] to vehicular pollution

Hadayat¹,

Hussain²,

Shahbaz³

et al. 2018

PAK.J.BOT.

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Vehicular traffic has become a primary source of pollution along the roadsides which adversely affects plants and other biota. This study was conducted to assess the effects of vehicular pollutants on Calotropis procera growing at different sites along two major roads [Pindi Bhattian to Kala Shah Kaku (M-2) and Lahore to Gujranwala (G.T. road)] in the Punjab province of Pakistan. Control samples of Calotropis procera were collected at a distance of 50 m away from the roads. The photosynthetic rate (A), stomatal conductance (gs), transpiration rate (E), water use efficiency (WUE), contents of photosynthetic pigments, total free amino acids and antioxidant activity of C. procera were determined. The results showed significantly lower contents of chlorophyll a, chlorophyll b, total chlorophyll and carotenoids in C. procera along the roadside as compared to control plants. Similarly, stomatal conductance was also significantly lower, as was the case with photosynthetic and transpiration rates in C. procera growing along the roadside. The overall decrease in photosynthetic rate of C. procera was 34.90% and 44.79% along M-2 and G.T. road, respectively as compared to control. Reduced photosynthesis in roadside plants resulted in higher levels of water use efficiency. The higher contents of free amino acids and antioxidant activity were recorded and might be ascribed to the activation of the defense system of plants to cope with the detrimental effects of vehicle-related air pollutants. The correlation of different attributes of C. procera with traffic density was significant that suggested the direct impact of vehicular emissions on this species. Hence, C. procera can be used as a biomonitor of vehicular pollution.

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Cloroplast pigments as indicators of lead stress

Cited by 10 publications

References 19 publications

Nutritional and biochemical changes induced by lead in sunflower (Helianthus annuus L.)

Nutritional and biochemical changes induced by lead in sunflower (Helianthus annuus L.)

Variations in the Phytoremediation Efficiency of Metal-polluted Water with Salvinia biloba: Prospects and Toxicological Impacts

Physio-biochemical responses of apple-of-sodom [Calotropis procera (Aiton) W. T. Aiton] to vehicular pollution

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