Responses of Ricinus communis L. (castor bean, phytoremediation crop) seedlings to lead (Pb) toxicity in hydroponics

Prasad, Majeti Narasimha Vara

doi:10.15316/sjafs.2017.9

Cited by 16 publications

(20 citation statements)

References 20 publications

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“…The authors did not observe anomalies in the thylakoid membranes when Pb was less than 10 μmol L -1 ; however, chloroplasts treated with 500 μmol L -1 exhibited alterations in their compositions and fewer thylakoids. On the other hand, our results were contrary to those found by Kiran and Prasad (2017), who verified a reduction in chlorophyll a and b content in the leaves of R. communis by approximately 50% and 30% at Pb doses of 200 and 400 μM, respectively. Pal et al (2013) found a 23% reduction in chlorophyll a and b content in R. communis when the soil was dosed with 800 mg kg -1 Pb.…”

Section: Chlorophyll Fluorescencecontrasting

confidence: 99%

Metabolic alterations and X-ray chlorophyll fluorescence for the early detection of lead stress in castor bean (Ricinus communis) plants

Nascimento

Marques

2018

Acta Sci. Agron.

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The remediation of lead-contaminated areas poses a serious challenge to soil chemists because Pb has low solubility in soil. Thus, Pb phytostabilization is considered to be an attractive remediation technique. Castor bean (Ricinus communis) is an oilseed crop known for its tolerance to heavy metals, and our aim was to assess the early detection of Pb toxicity and the effects of Pb on the biomass, photosynthetic pigments, antioxidative enzyme activities, and total soluble proteins of this plant. Specimens were grown in a nutrient solution spiked with Pb concentrations of 25, 50, 100, 150, or 200 µmol L-1. A control without Pb was also grown. The results show that X-ray chlorophyll fluorescence is an efficient technique for the early detection of photosystem II alterations driven by Pb toxicity. Castor bean was tolerant to the Pb doses tested; plants presented no changes in photosynthetic pigments, defense enzyme activities, or total soluble proteins in leaves. Given its ability to tolerate and accumulate Pb in its roots, castor bean is a viable alternative for phytostabilization and phytoattenuation of lead-contaminated areas. It is also economically attractive for industrial and biofuel oil production while being used for remediation.

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Section: Chlorophyll Fluorescencecontrasting

confidence: 99%

Metabolic alterations and X-ray chlorophyll fluorescence for the early detection of lead stress in castor bean (Ricinus communis) plants

Nascimento

Marques

2018

Acta Sci. Agron.

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“…The data here show that S. babylonica has the ability to uptake and accumulate Pb. TF value > 1, that is to say, large amounts of Pb are transported to the shoots from the roots, which differs from other plants, including Allium sativum, Ricinus communis, Brassica juncea, Neyraudia reynaudiana, and some other willow clones, in which, large amounts of Pb ions are accumulated in the roots and small amounts are transported to the shoots after Pb stress [13,14,25,34,35]. Nevertheless, some studies have reported on the use of crop plants and forest plants, including poplar and willows, to remove heavy metals from contaminated soils [22,23,26,[36][37][38][39][40].…”

Section: Discussionmentioning

confidence: 99%

“…Evidence has demonstrated that Pb can be easily absorbed, transformed, and accumulated in plant tissues, in which the roots are the primary sites of accumulation [9][10][11][12]. A higher percentage of accumulated Pb is restricted within the roots, while only a small fraction of it is transported to the aerial parts of plants [13,14]. Previous reports demonstrated that Pb toxicity is associated with the inducement of a low mitotic index, disturbance of mitosis, visible chloroplast alterations, plant cell malformations, mitochondrial system abnormalities, inward invagination of cell walls, plasma membrane distortions, oversized vacuoles, and irregular plastoglobuli formations [15][16][17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Characterisation of early responses in lead accumulation and localization of Salix babylonica L. roots

2020

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Background: Lead (Pb) is a harmful pollutant that disrupts normal functions from the cell to organ levels. Salix babylonica is characterized by high biomass productivity, high transpiration rates, and species specific Pb. Better understanding the accumulating and transporting Pb capability in shoots and roots of S. babylonica, the toxic effects of Pb and the subcellular distribution of Pb is very important. Results: Pb exerted inhibitory effects on the roots and shoots growth at all Pb concentrations. According to the results utilizing inductively coupled plasma atomic emission spectrometry (ICP-AES), S. babylonica can be considered as a plant with great phytoextraction potentials as translocation factor (TF) value > 1 is observed in all treatment groups throughout the experiment. The Leadmium™ Green AM dye test results indicated that Pb ions initially entered elongation zone cells and accumulated in this area. Then, ions were gradually accumulated in the meristem zone. After 24 h of Pb exposure, Pb accumulated in the meristem zone. The scanning electron microscopy (SEM) and energy-dispersive X-ray analyses (EDXA) results confirmed the fluorescent probe observations and indicated that Pb was localized to the cell wall and cytoplasm. In transverse sections of the mature zone, Pb levels in the cell wall and cytoplasm of epidermal cells was the lowest compared to cortical and vessel cells, and an increasing trend in Pb content was detected in cortical cells from the epidermis to vascular cylinder. Similar results were shown in the Pb content in the cell wall and cytoplasm of the transverse sections of the meristem. Cell damage in the roots exposed to Pb was detected by propidium iodide (PI) staining, which was in agreement with the findings of Pb absorption in different zones of S. babylonica roots under Pb stress. Conclusion: S. babylonica L. is observed as a plant with great potential of Pb-accumulation and Pb-tolerance. The information obtained here of Pb accumulation and localization in S. babylonica roots can furthers our understanding of Pb-induced toxicity and its tolerance mechanisms, which will provide valuable and scientific information to phytoremediation investigations of other woody plants under Pb stress.

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“…Increasing the concentrations of Cd (0, 10, 50 mol•L −1 ) increased the MDA content in the leaves of R. communis by 42.32% as compared with the control (Chen 2015). The roots of R. communis under Pb (200 and 400 mol•L −1 ) stress were found to contain higher amounts of MDA when compared with the control (Kiran and Prasad 2017). Recently, Khan et al (2018) reported that increasing concentrations of Pb (0, 100, 200, and 500 mol•L −1 ) increased H 2 O 2 and MDA content in R. communis and decreased H 2 O 2 and MDA content in B. mutica, which was attributed to a special defense mechanism in B. mutica.…”

Section: Metal-induced Oxidative Stress In R Communismentioning

confidence: 94%

“…Heavy metal stress disrupts the uptake of essential minerals and photosynthetic pigments (chlorophyll (Chl), carotenoid) (Hazama et al 2015;Khalid et al 2019;Kiran and Prasad 2017;Pal et al 2013). Cd restricted the uptake of Cu and Fe in the growth medium, which affected the growth of R. communis (Hazama et al 2015).…”

Section: Growth Responses Of R Communis Under Metal Stressmentioning

confidence: 99%

The utilization of Ricinus communis in the phytomanagement of heavy metal contaminated soils

Yeboah

Lü

et al. 2020

Environ. Rev.

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Soil contamination with toxic metals is a major global concern due to their effects on plants and the ecosystem. In contaminated soils, some plant species have the ability to remediate heavy metals. Ricinus communis L., is an industrial crop plant gaining popularity in the remediation of heavy metal-contaminated soils owing to its strong and deep penetrating roots aiding high metal accumulation and large biomass level. R. communis can tolerate high amount of metals by adopting different strategies which include the production of antioxidant enzymes, subcellular localization, and exudation of organic acid. At the molecular level, R. communis can tolerate metal stress by activating stress-responsive genes. Proper selection of metal tolerant R. communis cultivars is effective in the remediation of metal-contaminated soils, owing to their high capacity for metal tolerance. Exogenous application of mineral fertilization and the use of microbes and chelating agents increase metal solubility and availability for plant uptake in soil. Also, good agronomic practices such as co-planting of R. communis with other leguminous crops, enhance R. communis growth and metal tolerance, thereby improving remediation of metal-contaminated soils. This review, therefore, critically discusses the recent approaches in using R. communis to remediate metal-contaminated soils.

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Responses of Ricinus communis L. (castor bean, phytoremediation crop) seedlings to lead (Pb) toxicity in hydroponics

Cited by 16 publications

References 20 publications

<b>Metabolic alterations and X-ray chlorophyll fluorescence for the early detection of lead stress in castor bean (<i>Ricinus communis</i>) plants

<b>Metabolic alterations and X-ray chlorophyll fluorescence for the early detection of lead stress in castor bean (<i>Ricinus communis</i>) plants

Characterisation of early responses in lead accumulation and localization of Salix babylonica L. roots

The utilization of Ricinus communis in the phytomanagement of heavy metal contaminated soils

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