Structural changes in response to bioaccumulation of iron and mercury in Chromolaena odorata (L.) King &amp; Robins.

K., Swapna,; Salim, Nurjannah; Chandra, Ratheesh; Puthur, Jos T.

doi:10.1007/s10661-015-4732-y

Cited by 11 publications

(5 citation statements)

References 38 publications

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“…In our case, the presence of discriminant wavelengths at around 2200 nm could arise from differences between treatments observed toward the end of the experiment, as described above. Many authors have demonstrated that reflectance in the SWIR is particularly dependent on leaf water content and structure, − which are affected by water-deficit and by HC and HM contamination. ,,, It might explain the large number of discriminant wavelengths in the SWIR in our study. This is corroborated by the observations in the NIR, which exhibits discriminant wavelengths between 900 and 1100 nm, also consistent with water absorption. , So, despite the intentional elimination of water absorption bands at around 1400 and 1900 nm that are particularly sensitive to the alteration of plant water content, the rest of the SWIR and the NIR were still significant for discriminating the responses of Rubus plants to the different treatments.…”

Section: Resultsmentioning

confidence: 71%

“…Many authors have demonstrated that reflectance in the SWIR is particularly dependent on leaf water content and structure, 45−47 which are affected by water-deficit and by HC and HM contamination. 24,26,48,49 It might explain the large number of discriminant wavelengths in the SWIR in our study. This is corroborated by the observations in the NIR, which exhibits discriminant wavelengths between 900 and 1100 nm, also consistent with water absorption.…”

Section: Environmental Science and Technologymentioning

confidence: 79%

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Assessing Soil Contamination Due to Oil and Gas Production Using Vegetation Hyperspectral Reflectance

Lassalle

Crédoz

Hédacq

et al. 2018

Environ. Sci. Technol.

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The remote assessment of soil contamination remains difficult in vegetated areas. Recent advances in hyperspectral spectroscopy suggest making use of plant reflectance to monitor oil and gas leakage from industrial facilities. However, knowledge about plant response to oil contamination is still limited, so only very few imaging applications are possible at this stage. We therefore conducted a greenhouse experiment on three species long-term exposed to either oil-contaminated or water-deficient soils. Reflectance measurements were regularly performed at leaf and plant scale over 61 days of exposure. Results showed an increase of reflectance in the visible (VIS), the red-edge and the short-wave infrared (SWIR) under both oil and water-deficit stress exposure. A contrasted response in the near-infrared (NIR) was also observed among species. Spectra underwent transformations to discriminate species' responses to the different treatments using linear discriminant analysis (LDA) with a stepwise procedure. Original and transformed spectra enabled to discriminate the plants' responses to the different treatments without confusion after 61 days. The discriminating wavelengths were consistent with the spectral differences observed. These results suggest differential changes in plant pigments, structure and water content as a response to various stressors, and open up promising perspectives for airborne and satellite applications.

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Section: Resultsmentioning

confidence: 71%

Section: Environmental Science and Technologymentioning

confidence: 79%

Assessing Soil Contamination Due to Oil and Gas Production Using Vegetation Hyperspectral Reflectance

Lassalle

Crédoz

Hédacq

et al. 2018

Environ. Sci. Technol.

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show abstract

“…will have an enhanced activity and accumulation. According to Swapna et al, (2015) [29] even in hyper accumulator and hyper tolerant plant species as in other organisms, higher concentrations of toxic chemicals and heavy metals can severely impair central metabolic processes. Belhaj et al…”

Section: Discussionmentioning

confidence: 99%

Effect of sewage sludge application on growth and photosynthetic pigments in vetiver grass (<em>Vetiveria zizanioides</em> L. Nash)

G¹,

Gopal²,

PM³

2021

Int. J. Adv. Biochem. Res.

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The study was conducted to evaluate the effect of sewage sludge application on growth and photosynthetic pigments in vetiver grass. Vetiver plants were grown in poly-ethylene U-V stabilized grow bags (24 X 24 X 40) for a period of three months (90 days), where the soil treated with different sewage sludge concentrations (0, 25, 50 and 75%). Physico-chemical characterization of sewage sludge showed that it was slightly acidic with significant concentrations of heavy metals (Cd, Cr, Cu, Pb and Zn), nutrients and mineral ions. Results showed that there were no apparent symptoms of toxicity on the morphology (leaf color, plant height and number of leaves) of the sludge amended vetiver plants. It has been observed that 25% sludge concentration has a favorable effect on the growth and photosynthetic pigments of plants. But at 50 and 75% sludge concentration, photosynthetic pigments such as chlorophylls and Pheophytin content showed a gradual decline with increase in sludge concentration while the carotenoid content was increased gradually. Even though compared to control plants sludge amendment increased the total wet biomass production in all the experimental plants with a gradual increase with increase in sludge concentration. This study proves that use of sewage sludge as an amendment will improve the growth and biomass production in vetiver plants up to 25% of the total soil. But even at this concentration carotenoid content was high and it may be due to defense mechanisms induced in response to heavy metal stress. The study, therefore, suggests that even though the sewage sludge is highly enriched with various nutrients, considering the heavy metal content, the fertilizer application of sewage sludge is dangerous, because the risk of environmental contamination is very high. The study pointed out that the vetiver plants growing in sludge amended area have potentially developed the defense strategy to combat against heavy metal toxicity. Therefore, the highly tolerant vetiver plants (Vetiveria zizanioides, L. Nash) may be used for phytoremediation purposes.

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“…One of the early plant responses to heavy metal stress is the production of ROS in chloroplasts, mitochondria, and peroxisomes and it damages the physiological and biochemical pathways, resulting in decreased cell membrane stability, photosynthesis efficiency, hormonal and nutrient imbalances, inhibition of DNA replication, gene expression and cell division [25,32,33]. According to Swapna., et al [34] even in hyper accumulator and hyper tolerant plant species as in other organisms, higher concentrations of toxic chemicals and heavy metals can severely impair central metabolic processes. So, the study proved that use of sewage sludge as an amendment increased the non-enzymatic anti-oxidant activities in exposed vetiver plants.…”

Section: Bibliographymentioning

confidence: 99%

Effect of Sewage Sludge Amendment on Non-enzymatic Antioxidants in Vetiver Plants (Vetiveria zizanioides L. Nash.)

G¹,

Gopal²,

PM³

2023

Act Sci VetSci

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The study was conducted to evaluate the influence of sewage sludge application on the activity of non-enzymatic antioxidants in vetiver grass such as proline, ascorbic acid, total phenol and total free amino acids. Vetiver plants were grown in poly-ethylene U-V stabilized grow bags (24 X 24 X 40) for a period of three months (90 days), where the soil was treated with different sewage sludge concentrations (0, 25, 50,75 and 100%). After the experimental period, plants were harvested and analysed. The result showed activity of proline, ascorbic acid and total free amino acids was high in roots compared to that of leaves in the experimental plants, while the total phenol content was high in leaves than that in the roots. It was also noted that with an increase in the concentration of sewage sludge application, activity of all the selected antioxidants was also increased significantly (p < 0.05). Increased antioxidant activity in plants may be due to various environmental stresses to prevent damages due to ROS formation. Sewage sludge is a mixture of toxic compounds including PCBs, flame retardants, heavy metals, nano-materials, hormones, dangerous pathogens etc., which may induce the antioxidant defence system in vetiver plants to protect them from oxidation due to the generation of ROS. Therefore, the induction of non-enzymatic antioxidants in the present study is considered to be an important protective mechanism to minimize oxidative damage in vetiver plants grown in sewage sludge polluted environment. The study pointed out that the vetiver plants growing in sludge amended area have potentially developed the defence strategy to combat against toxicity induced stress. Therefore, the highly tolerant vetiver plants (Vetiveria zizanioides, L. Nash) may be used for phytoremediation purposes.

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Structural changes in response to bioaccumulation of iron and mercury in Chromolaena odorata (L.) King & Robins.

Cited by 11 publications

References 38 publications

Assessing Soil Contamination Due to Oil and Gas Production Using Vegetation Hyperspectral Reflectance

Assessing Soil Contamination Due to Oil and Gas Production Using Vegetation Hyperspectral Reflectance

Effect of sewage sludge application on growth and photosynthetic pigments in vetiver grass (<em>Vetiveria zizanioides</em> L. Nash)

Effect of Sewage Sludge Amendment on Non-enzymatic Antioxidants in Vetiver Plants (Vetiveria zizanioides L. Nash.)

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