Lead accumulation reduces photosynthesis in the lead hyper-accumulator Salvinia minima Baker by affecting the cell membrane and inducing stomatal closure

Leal-Alvarado, D.A.; Espadas-Gil, Francisco; Sáenz, Luis; Talavera-May, Carlos; Santamaría, Jorge M.

doi:10.1016/j.aquatox.2015.12.008

Cited by 47 publications

(22 citation statements)

References 42 publications

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“…Similar results were observed for the content of soluble carbohydrates (Table 3). It has been described that the presence of heavy metals in the environment affects the production of soluble carbohydrates in some species of Salvinia, resulting in a decrease of the macrophytes photosynthetic capacity [42,51]. However, our results indicate that the presence of Cu, Pb, Cd, or Zn at the selected concentrations and exposure times, did not affect carbohydrate metabolism in the aerial organs of S. biloba.…”

Section: Evaluation Of Metal Phytotoxicity In S Bilobacontrasting

confidence: 71%

“…However, no differences were observed in the chlorophylls content for Cd and Zn treated-plants in comparison to the control specimens (i.e., no metal-exposed). These results suggest that both Cu and Pb interfere with the normal metabolism of S. biloba since chlorophylls play an important role in the capture of sunlight for plants photosynthetic bioprocesses [42]. In addition, carotenoids levels were also significantly affected when these macrophytes were exposed to 100 ± 1 µM Cu.…”

Section: Evaluation Of Metal Phytotoxicity In S Bilobamentioning

confidence: 87%

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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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Section: Evaluation Of Metal Phytotoxicity In S Bilobacontrasting

confidence: 71%

Section: Evaluation Of Metal Phytotoxicity In S Bilobamentioning

confidence: 87%

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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“…Intercellular CO 2 concentration can be used to determine whether this effect is stomatal or nonstomatal. In the present study, the intercellular CO 2 concentration increased, and the transpiration rate increased first and then decreased with increasing Cd concentrations, which indicated that stomatal limitation is not the main factor affecting the photosynthesis of D. involucrate [53,54]. Under Cd stress alone, the net photosynthetic rate was lower than that under the control treatment and reached the lowest level at 10 mg�kg -1 added Cd, indicating that, compared with Pb, Cd had a stronger inhibitory effect on photosynthesis.…”

Section: Response Of Gas-exchange Parameters To Pb and CDmentioning

confidence: 79%

Response of photosynthesis to different concentrations of heavy metals in Davidia involucrata

et al. 2020

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Lead (Pb) and cadmium (Cd) are highly toxic and are widespread in agricultural soils, representing risks to plant and human health. In this study, Davidia involucrata was cultivated in soil with different concentrations of Pb and Cd and sampled after 90 days. We used ANOVA to analyse the photosynthesis of D. involucrata and the ability of Pb and Cd to enrich and migrate in roots, stems and leaves. Various results are described here. 1) Under individual and combined Pb and Cd stress, the accumulation factors in the roots were greater than 1, which was significantly greater than those in the stems and leaves (P < 0.05), and the translocation factors both were less than 1. The Pb and Cd enrichment ability of D. involucrata roots was significantly higher than that of stems and leaves, and the migration ability of the two heavy metals in D. involucrata was weak. 2) The Mg-dechelatase activities of chlorophyll degradation products increased under stress due to high concentrations of Pb and Cd. However, chlorophyllase activity was higher at relatively low concentrations of the two heavy metals (P < 0.05). δ-Aminolevulinic acid and porphobilinogen of chlorophyll synthesis products are easily converted to uroporphyrinogen III under low concentrations of Cd, which promotes the synthesis of chlorophyll.3) The effect of Cd stress alone on the chlorophyll concentration was not significant. Under combined stress, concentrations of Pb and Cd in the range of 400~800 mg�kg -1 and 5~20 mg�kg -1 significantly promoted an increase in photosynthetic pigments (P < 0.05). 4) Inhibition of the net photosynthetic rate increased with increasing Pb and Cd concentrations under both individual and combined stress. In addition, the root of D. involucrata had a strong absorption and fixation effect on heavy metals, thereby reducing metal toxicity and improving the tolerance of D. involucrata to heavy metals. , et al. (2020) Response of photosynthesis to different concentrations of heavy metals in Davidia involucrata. PLoS ONE 15(3): e0228563.

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“…Lead limits seed germination, biomass production and also causes nutrients imbalance in plants (Sharma and Dubey 2005;Malar et al, 2016). It damages cell membranes and suppresses photosynthetic capacity and stomatal conductance of the plant by inhibiting biosynthesis of chlorophylls, activity of Rubisco and water uptake (Lunde et al, 2008;Rossato et al, 2012;Leal-Alvarado et al, 2016). Also, Pb induces oxidative stress by overproducing ROS, such as singlet oxygen ( 1 O 2 ), superoxide radical (O 2…”

Section: Introductionmentioning

confidence: 99%

Ascorbic acid improves the tolerance of wheat plants to lead toxicity

Alamri

Siddiqui

Al-Khaishany

et al. 2018

Journal of Plant Interactions

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Among the heavy metals (HMs), lead (Pb) is considered as a toxic HM which adversely affects growth and development of crop plants. The present experiment was aimed to investigate the potential role of ascorbic acid (ASC) in the reversal of Pb-inhibited nitrogen and sulfur assimilation enzymes activity and activity of photosynthesis enzyme ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco) and growth response in wheat plants. Wheat seedlings were subjected to 0 mM (control) and 0.2 mM and 0.6 mM of ASC with and without 2 mM of Pb. Plants treated with Pb exhibited the following reduced growth characteristics (root length, shoot length, root fresh weight (FW), shoot FW, root dry weight (DW) and shoot DW). A decrease was also observed in the activity of Rubisco and ATP sulfurylase (ATP-S), relative water content (RWC), accumulation of total chlorophyll (Total Chl) and content of nutrients [nitrogen (N), phosphorus (P), potassium (K), calcium (Ca) and magnesium (Mg)] in Pb-treated plants. However, an increase in Chl degradation and in the activity of O-acetylserine(thiol)lyase (OAS-TL) and accumulation of cysteine (Cys), malondialdehyde (MDA) and hydrogen peroxide (H 2 O 2 ) was observed in plants under Pb stress. On the contrary, exogenous application of ASC mitigated the Pb-toxicity-induced oxidative damage by enhancing the activities of antioxidant enzymes, such as superoxide dismutase, catalase and glutathione reductase. Improved activity of antioxidant enzymes suppressed the formation of MDA and H 2 O 2 , which was reflected in the form of improved growth characteristics. Moreover, ASC induced improvement in plants defense systems by reduced Chl degradation and improved the content of essential nutrients (N, P, K, Ca and Mg) and Cys, RWC and the activity of Rubisco, ATP-S, NR and OAS-TL. ARTICLE HISTORY

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Lead accumulation reduces photosynthesis in the lead hyper-accumulator Salvinia minima Baker by affecting the cell membrane and inducing stomatal closure

Cited by 47 publications

References 42 publications

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

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

Response of photosynthesis to different concentrations of heavy metals in Davidia involucrata

Ascorbic acid improves the tolerance of wheat plants to lead toxicity

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