Impact of proline application on cadmium accumulation, mineral nutrition and enzymatic antioxidant defense system of Olea europaea L. cv Chemlali exposed to cadmium stress

Zouari, Mohamed; Ahmed, Chedlia Ben; Elloumi, Nada; Bellassoued, Khaled; Delmail, David; Labrousse, Pascal; Abdallah, Ferjani Ben; Rouina, Béchir Ben

doi:10.1016/j.ecoenv.2016.02.024

Cited by 127 publications

(63 citation statements)

References 56 publications

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“…According to Gajewska et al (2013), the decrease in stomatal conductance is a common response to HMs stress. This reduction under stress condition may be attributed to the reduced stomatal pore size that induces lower photosynthetic rate (Elloumi et al, 2014;Zouari et al, 2016). Sipos et al (2013) showed that the lower Chl concentration may have resulted in lower photosynthetic performance that required a lower gas exchange rate leading to stomatal closure.…”

Section: Discussionmentioning

confidence: 99%

Effects of sewage sludge on bio-accumulation of heavy metals in tomato seedlings

Elloumi

Belhaj

Jerbi

et al. 2017

Span. j. agric. res.

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The proposal to use sewage sludge (SS) on agricultural fields as a sustainable way to dispose of the waste is based on its high organic and nutrients content. However, the presence of heavy metals (HMs) in sludge can contaminate crops and accumulate in the food chain. The aim of this study was to assess changes in soil fertility, biochemical responses of tomato (Solanum lycopersicum L. cv. Rio Grande) seedlings and the availability of HMs with increased rate application of SS (0, 2.5, 5 and 7.5%). Leaf chlorophyll content, nutritional status, proline, membrane peroxidation, stomatal conductance and HM accumulation were investigated. Results showed that the soil pH decreased, whereas soil salinity, organic carbon, total N, available P and exchangeable Na, Ca, K and HM content increased significantly with increasing application rates of SS. Among the three HMs (Zn, Cu and Cr), Zn had the highest capacity for transferring from soil into plants. Low metal translocation was observed from roots to leaves. The 7.5% SS dose decreased biomass production and caused a decline in chlorophyll content and stomatal conductance. However, lipid peroxidation and proline contents increased. Therefore, the use of 2.5 and 5% doses of sewage sludge in agriculture would be an efficient and costeffective method to restore the fertility of soil and an environment-friendly solution for disposal problems.Additional key words: sewage sludge amendment; soil fertility; biochemical responses; Solanum lycopersicum.

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Section: Discussionmentioning

confidence: 99%

Effects of sewage sludge on bio-accumulation of heavy metals in tomato seedlings

Elloumi

Belhaj

Jerbi

et al. 2017

Span. j. agric. res.

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“…Later, the enzyme P5C reductase aids in the reduction of P5C to proline. The stimulation of proline levels under HM stress was observed, for example, in Olea europaea [135] and Phoenix dactylifera [136]. However, this is not clear whether the accumulation was attributable to enhanced production of enzymes responsible for proline synthesis, the decrease in enzymes related to its oxidation or both.…”

Section: Prolinementioning

confidence: 99%

The Role of Salicylic Acid in Plants Exposed to Heavy Metals

Sidhu²,

et al. 2020

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Salicylic acid (SA) is a very simple phenolic compound (a C7H6O3 compound composed of an aromatic ring, one carboxylic and a hydroxyl group) and this simplicity contrasts with its high versatility and the involvement of SA in several plant processes either in optimal conditions or in plants facing environmental cues, including heavy metal (HM) stress. Nowadays, a huge body of evidence has unveiled that SA plays a pivotal role as plant growth regulator and influences intra- and inter-plant communication attributable to its methyl ester form, methyl salicylate, which is highly volatile. Under stress, including HM stress, SA interacts with other plant hormones (e.g., auxins, abscisic acid, gibberellin) and promotes the stimulation of antioxidant compounds and enzymes thereby alerting HM-treated plants and helping in counteracting HM stress. The present literature survey reviews recent literature concerning the roles of SA in plants suffering from HM stress with the aim of providing a comprehensive picture about SA and HM, in order to orientate the direction of future research on this topic.

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“…Several studies on the impact of various stresses including heavy metal exposure on microalgal growth have been done (Pinto et al, 2003;Zouari et al, 2016). Algae often minimize free radical damage by inducing an antioxidant defensive system (Li et al, 2006;Olivares et al, 2016), such as non-enzymatic (e.g., glutathione (GSH), tocopherols, ascorbate (ASC), and carotenoids), and enzymatic (e.g., superoxide dismutase (SOD), catalase, ascorbate peroxidase (APX)), which are known to be involved in protecting plants against high toxic levels of heavy metals (Pinto et al, 2003;Sáeza et al, 2015;Machado and Soares, 2016;Moenne et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Metabolomics and Biological activities of Chlorella vulgaris grown under modified growth medium (BG11) composition

El-fayoumy¹,

Shanab²,

Shalaby³

2020

CMUJNS

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The aim of this work was to determine the biochemical compounds and evaluate the biological activities of Chlorella vulgaris cultivated under a biotic stress condition (various Zinc and Cupper conc.). The growth rate was recorded as well as determination of active compounds, pigments and defense enzymes, in addition to the biological activities as antioxidant, antimicrobial and anticancer. The obtained results revealed that, higher copper concentrations [0.632 mg /L (Cu)] showed an inhibitory effect to growth while 1.76 mg /L (Zn) enhanced growth which reached its maximum at 25 th day of cultivation. Furthermore, combination of 0.88mg/L (Zn) and 0.316mg /L (Cu) induced an increase in growth rate, catalase, tannins, lipid peroxidation and glutathione-S-transferase and a decrease in flavonoids, phenolic content, protein and antioxidant activity. Also, the results of antioxidant activity showed that, elevation of Zn conc. induced an augmentation of antioxidant activity either by DPPH(2, 2 diphenyl-1-picrylhydrazyl) or ABTS (2, 2'-azino-bis ethylbenzthiazoline-6-sulfonic acid), with maximum activity at 0.88 mg/L Zinc conc. (89.91%) even exceeded those of control (85.62%). While more elevated Zn conc. (1.76 mg/L) induced lower activity when compared with synthetic antioxidant standard (Butylated hydroxyl toluene, BHT). Concerning antimicrobial activity, Gram +ve bacteria, Staphylococcusaureus recorded moderate activity in sulfur-contained extract. Cytotoxicity of three cancer cell lines was inversely proportional to extracts conc. used, where the higher conc. (500µg/ml) showed the lowest cell viability of the tested cell lines which ranged from 22.06 to 69.89%. 0.316 mg/L (Cu) of conc. 500 µg/ml recorded the lowest

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Impact of proline application on cadmium accumulation, mineral nutrition and enzymatic antioxidant defense system of Olea europaea L. cv Chemlali exposed to cadmium stress

Cited by 127 publications

References 56 publications

Effects of sewage sludge on bio-accumulation of heavy metals in tomato seedlings

Effects of sewage sludge on bio-accumulation of heavy metals in tomato seedlings

The Role of Salicylic Acid in Plants Exposed to Heavy Metals

Metabolomics and Biological activities of Chlorella vulgaris grown under modified growth medium (BG11) composition

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