Insights into cadmium induced physiological and ultra-structural disorders in Juncus effusus L. and its remediation through exogenous citric acid

Ullah, Najeeb; Jilani, Ghulam; Ali, Shafaqat; Sarwar, Muhammad; Xu, Ling; Zhou, Weijun

doi:10.1016/j.jhazmat.2010.11.037

Cited by 251 publications

(102 citation statements)

References 45 publications

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“…Toxicity of Cd to plants is generally associated with disruption of water and nutrient uptake and transport (Kabata-Pendias 1993;Zhang et al 2010;Douchiche et al 2012), alteration of nitrogen metabolism (Dguimi et al 2009), disruption of ATPase activity (Lin et al 2012), reduced photosynthesis, plant growth and respiration, dysfunction of the plant photosynthetic machinery in chloroplasts and stomatal closure (Hasan et al 2011). Other symptoms of Cd toxicity may include reduced plant length and browning of roots, leaf rolling, chlorosis, and necrosis (Najeeb et al 2011).…”

Section: Introductionmentioning

confidence: 99%

Cadmium Bioavailability, Uptake, Toxicity and Detoxification in Soil-Plant System

Shahid

Dumat

Khalid

et al. 2016

Reviews of Environmental Contamination and Toxicology

231

175

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This review summarizes the findings of the most recent studies, published from 2000 to 2016, which focus on the biogeochemical behavior of Cd in soil-plant systems and its impact on the ecosystem. For animals and people not subjected to a Cd-contaminated environment, consumption of Cd contaminated food (vegetables, cereals, pulses and legumes) is the main source of Cd exposure. As Cd does not have any known biological function, and can further cause serious deleterious effects both in plants and mammalian consumers, cycling of Cd within the soil-plant system is of high global relevance.The main source of Cd in soil is that which originates as emissions from various industrial processes. Within soil, Cd occurs in various chemical forms which differ greatly with respect to their lability and phytoavailability. Cadmium has a high phytoaccumulation index because of its low adsorption coefficient and high soil-plant mobility and thereby may enter the food chain. Plant uptake of Cd is believed to occur mainly via roots by specific and non-specific transporters of essential nutrients, as no Cd-specific transporter has yet been identified. Within plants, Cd causes phytotoxicity by decreasing nutrient uptake, inhibiting photosynthesis, plant growth and respiration, inducing lipid peroxidation and altering the antioxidant system and functioning of membranes. Plants tackle Cd toxicity via different defense strategies such as decreased Cd uptake or sequestration into vacuoles. In addition, various antioxidants combat Cd-induced overproduction of ROS. Other mechanisms involve the induction of phytochelatins, glutathione and salicylic acid.

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Section: Introductionmentioning

confidence: 99%

Cadmium Bioavailability, Uptake, Toxicity and Detoxification in Soil-Plant System

Shahid

Dumat

Khalid

et al. 2016

Reviews of Environmental Contamination and Toxicology

231

175

View full text Add to dashboard Cite

show abstract

“…The chloroplast is a large, complex double membrane organelle that performs the function of photosynthesis within plant cells and contains the substance chlorophyll that is essential for this process. Cd convincingly resulted in marked distortion of chloroplast ultrastructure leading to disturbed shape and inflated thylakoids [14]. Once Cd enters chloroplasts, it can disturb chloroplast function by inhibiting the enzymatic activities of chlorophyll biosynthesis, pigment -protein complexes, O 2 -evolving reactions of photosystem II (PSII), electron flow around photosystem I (PSI), and chloroplast structure [15][16][17][18].…”

mentioning

confidence: 99%

Ultrastructural and Photosynthetic Response of Populus 107 Leaves to Cadmium Stress

Ge¹,

Jiao²,

Jiang³

et al. 2015

Pol. J. Environ. Stud.

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“…Notably, diminished activities of GPX and GST at high Cd level (2.0 mg L −1 Cd 2+ ) were reported to indicate an increased seedlingsenescence and plant-death in Suaeda salsa at the same Cd level (Liu et al, 2012). Increasing Cd-mediated decrease in the growth of Juncus effusus was indicated by a diminished activity of CAT (and also APX, and peroxidase) (Najeeb et al, 2011).…”

Section: Biochemical Markers-role and Implication In Metal/metalloid-mentioning

confidence: 97%

Biophysical and Biochemical Markers of Metal/Metalloid-Impacts in Salt Marsh Halophytes and Their Implications

Anjum

Duarte

Sleimi

et al. 2016

Front. Environ. Sci.

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As a major sink, estuarine/salt marsh ecosystem can receive discharges laden with myriads of contaminants including metals/metalloids from man-made activities. Two among the major consequences of metal/metalloid-exposure in estuarine/salt marsh ecosystem flora such as halophytic plants are: (a) the excessive accumulation of light energy that in turn leads to severe impairments in the photosystem II (PS II), and (b) metal/metalloids-accrued elevation in the cellular reactive oxygen species (ROS) that causes imbalance in the cellular redox homeostasis. On one hand, plants adopt several strategies to dissipate excessive energy hence eventually to avoid damage in the PS II and maintain optimum photosynthesis. On the other hand, components of the cellular redox system quickly respond to metal/metalloid-exposure, where plants try to maintain a fine-tuning among these components, and tightly control the level of ROS and its potential consequences. Herein, major insights into, and the significance and implications of important biophysical and biochemical markers in metal/metalloid-exposed halophytes are overviewed and also highlighted main aspects so far least explored in the present context. Discussion advocates to regularly monitor and integrate studies on the highlighted herein biophysical and biochemical markers taking into account the missing aspects such as essential and non-essential metal/metalloid-speciation, -availability, and -methylation, role of the obvious microbial activities, and a comparative account of the outcomes of the studies on mixture of metal/metalloid performed in laboratory and field conditions. Thus, consideration of these missing aspects in future studies on the subject can help us to: (a) unveil the status of the metal/metalloid-contamination and -impact; (b) understand adaptive responses of salt marsh halophyte to metals/metalloids, and also (c) to devise sustainable strategies for the environmental or ecosystem management and safety.

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Insights into cadmium induced physiological and ultra-structural disorders in Juncus effusus L. and its remediation through exogenous citric acid

Cited by 251 publications

References 45 publications

Cadmium Bioavailability, Uptake, Toxicity and Detoxification in Soil-Plant System

Cadmium Bioavailability, Uptake, Toxicity and Detoxification in Soil-Plant System

Ultrastructural and Photosynthetic Response of Populus 107 Leaves to Cadmium Stress

Biophysical and Biochemical Markers of Metal/Metalloid-Impacts in Salt Marsh Halophytes and Their Implications

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