Physio-Anatomical Responses of Plants to Heavy Metals

Batool, Riffat; Hameed, Mansoor; Ashraf, Muhammad; Ahmad, Muhammad Sajid Aqeel; Fatima, Sana

doi:10.1007/978-94-007-7887-0_5

Cited by 16 publications

(14 citation statements)

References 107 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The toxic effect of Cu resulted in a decrease in length, surface area, mean diameter, and root volume, which reflected in a reduction in both root and shoot biomass at these concentrations. Batool et al (2015) emphasize that the evident reduction in root growth may be due to a reduction in cell division, leading to an increase in the cell wall thickness of the roots, when exposed to heavy metals.…”

Section: Root System Morphology and Dry Matter Attributesmentioning

confidence: 94%

“…The absorption of heavy metals by a plant can cause several anatomical changes, with possible functional consequences in the plant, besides other morphophysiological alterations (Batool et al 2015). The abaxial cuticle in the leaves, as well as the vascular cylinder area and cortex thickness in H. courbaril roots, was affected by excess Cu.…”

Section: Leaf and Root Anatomymentioning

confidence: 99%

See 1 more Smart Citation

Copper Toxicity on Photosynthetic Responses and Root Morphology of Hymenaea courbaril L. (Caesalpinioideae)

Marques

Júnior

Silva

et al. 2018

Water Air Soil Pollut

View full text Add to dashboard Cite

Copper (Cu) is a micronutrient essential for plant development. However, in excess, it is toxic to plants and may cause various physiological and morphological changes. The study of the growth of plants exposed to excess Cu is important for the development of phytoremediation programs and for understanding the mechanisms involved in the tolerance of this metal. In this context, the objective of this research was to evaluate the effect of excess copper on photosynthetic responses and root morphology of Hymenaea courbaril L. Biometric measurements, gas exchange, root morphology, and Cu content in tissues and indices (TI and TF) were assessed, involving metal content and biomass. Up to a concentration of 200 mg kg −1 , Cu favored growth, gas exchange, and root morphology of the plants under study. At a higher concentration (800 mg kg −1) in the soil, it affected plant growth and caused a decrease in photosynthetic rate. Biochemical limitations in photosynthesis were observed, as well as lower maximum net photosynthetic rate (A max), respiration rate in the dark (R d), light compensation point (LCP), light saturation point (LSP), and apparent quantum yield (α), when exposed to excess Cu. Root length, surface area, mean diameter, root volume, dry biomass, and specific root length decreased with high Cu concentrations in the soil. Cu was accumulated in the roots as a mechanism of tolerance to the excess of this metal in order to preserve the most metabolically active tissues present in the leaves. At a concentration of 800 mg kg −1 , copper also caused inhibition of the root system. Plants of H. courbaril showed tolerance to excess Cu in the soil and can be indicated for the recovery of areas contaminated with this metal.

show abstract

Section: Root System Morphology and Dry Matter Attributesmentioning

confidence: 94%

Section: Leaf and Root Anatomymentioning

confidence: 99%

Copper Toxicity on Photosynthetic Responses and Root Morphology of Hymenaea courbaril L. (Caesalpinioideae)

Marques

Júnior

Silva

et al. 2018

Water Air Soil Pollut

View full text Add to dashboard Cite

show abstract

“…Disintegration and reduced size of the parenchymatous tissue, degraded and smaller mesophyll tissue, reduced size of the xylem vessels, reduced root and stem diameter, and reduced leaf growth are some of the anatomical changes that occur. Moreover, there is a spatial accumulation of heavy metals in different organs, commonly in the dermal, parenchyma, and phloem tissues (Batool et al, 2015). As reported by Hameed et al (2010), salinity increases sclerification and succulence in the stem and leaves.…”

Section: Introductionmentioning

confidence: 81%

Investigating the anatomy of the halophyte Salsolacrassa and the impact of industrial wastewater on its vegetative and generative structures

Jahromi¹,

Jonoubi²,

Majd³

et al. 2019

Turk J Bot

View full text Add to dashboard Cite

Salsola crassa M.B. is one of the most successful plants used against industrial pollutants. In this study, we selected young Salsola crassa M.B. plants from their natural habitats. Some plants were irrigated with industrial wastewater containing Fe, Co, Ni, Cu, Pb, and Zn, and others were irrigated with tap water for 3-4 months. Afterwards, the shoots and roots were randomly cut, separated, fixed, dyed, and observed using light microscopy. Structural changes were analyzed by stereology. There were some differences in appearance and structure between the treated and control samples. For example, the number of leaves and flowers and the size of seeds and flowers in the treated plants were reduced. The diameter of the cortical parenchyma, the total area of each vascular bundle, surface area of the pith cells in the stem, leaf cuticle thickness, mechanical layer thickness of the anther, and diameter of pollen grains were reduced. A peculiar palisade chlorenchyma beneath the epidermis and unexpected small vascular bundles on the upper part of the cortex were features of both groups. Finally, we concluded that industrial waste water pollutants affected various aspects of plant development.

show abstract

“…At high Cu concentrations, biosynthesis of photosynthetic proteins such as Cu-containing plastocyanin PetE, are reduced [42]. Within plant cell organelles such as the chloroplast and nucleus, Cu (II) is often reduced to Cu (I), a reactive species that leads to oxidative stress [42][43][44][45][46][47]. Chloroplasts are a major storage location for Cu ions in plant cells [44,47].…”

Section: Stamp Sandmentioning

confidence: 99%

“…In the nucleus, Cu (I) binds to DNA in the presence of hydrogen peroxide and further reacts to form Cu (II) and hydroxylated-DNA, which damages the chromatin [43]. The reduced rate of photosynthesis leads to stunted growth in both aerial and root structures [42,46] and can explain the observed significant decreases in whole plant mass, shoot length, and root length. The present study did not specifically investigate the effects of copper speciation.…”

Section: Stamp Sandmentioning

confidence: 99%

Evaluation of Copper-Contaminated Marginal Land for the Cultivation of Vetiver Grass (Chrysopogon zizanioides) as a Lignocellulosic Feedstock and its Impact on Downstream Bioethanol Production

2019

View full text Add to dashboard Cite

Metal-contaminated soil could be sustainably used for biofuel feedstock production if the harvested biomass is amenable to bioethanol production. A 60-day greenhouse experiment was performed to evaluate (1) the potential of vetiver grass to phytostabilize soil contaminated with copper (Cu), and (2) the impact of Cu exposure on its lignocellulosic composition and downstream bioethanol production. Dilute acid pretreatment, enzymatic hydrolysis, and fermentation parameters were optimized sequentially for vetiver grass using response surface methodology (RSM). Results indicate that the lignocellulosic composition of vetiver grown on Cu-rich soil was favorably altered with a significant decrease in lignin and increase in hemicellulose and cellulose content. Hydrolysates produced from Cu exposed biomass achieved a significantly greater ethanol yield and volumetric productivity compared to those of the control biomass. Upon pretreatment, the hemicellulosic hydrolysate showed an increase in total sugars per liter by 204.7% of the predicted yield. After fermentation, 110% of the predicted ethanol yield was obtained for the vetiver grown on Cu-contaminated soil. By contrast, for vetiver grown on uncontaminated soil a 62.3% of theoretical ethanol yield was achieved, indicating that vetiver has the potential to serve the dual purpose of phytoremediation and biofuel feedstock generation on contaminated sites.

show abstract

Physio-Anatomical Responses of Plants to Heavy Metals

Cited by 16 publications

References 107 publications

Copper Toxicity on Photosynthetic Responses and Root Morphology of Hymenaea courbaril L. (Caesalpinioideae)

Copper Toxicity on Photosynthetic Responses and Root Morphology of Hymenaea courbaril L. (Caesalpinioideae)

Investigating the anatomy of the halophyte Salsolacrassa and the impact of industrial wastewater on its vegetative and generative structures

Evaluation of Copper-Contaminated Marginal Land for the Cultivation of Vetiver Grass (Chrysopogon zizanioides) as a Lignocellulosic Feedstock and its Impact on Downstream Bioethanol Production

Contact Info

Product

Resources

About