Seaweed effects on plant growth and environmental remediation: a review

Seaweeds are plants found in sea that have tremendous applications in the fields of agriculture and environment. It comprises of three giant classes with a large number of different species. their ability to adopt to various conditions qualifies them more applicable to various environmental and agricultural arena. Agriculturally, both three classes Phaeophyta, Rhodophyta and Chlorophyta, have significant roles in promoting plant growth and productivity and soil protection as well as reclamation with class Phaeophyta has highest contribution due to its alginic acid content and other multifaceted components that are higher followed by Rhodophyta and Chlorophyta. Seaweed (living or dead biomass) has ability to phycoremediate environment against heavy toxic metals and lessen the excessiveness of non-metal inorganic elements via physisorption, chemisorption with the aid of binding sites provided by proteins and carbohydrates functional groups existing in their cell walls and secretion of organic acids and intracellular transformation and accumulation. Seaweed is an important factor in environmental remediation and soil restoration processes.

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Heavy Metals and Human Health: Possible Exposure Pathways and the Competition for Protein Binding Sites

Molecules ◽

10.3390/molecules26196060 ◽

2021 ◽

Vol 26 (19) ◽

pp. 6060

Author(s):

Danuta Witkowska ◽

Joanna Słowik ◽

Karolina Chilicka

Keyword(s):

Heavy Metals ◽

Human Health ◽

Toxic Metals ◽

Binding Sites ◽

Protein Function ◽

Protein Binding Sites ◽

Biochemical Effects ◽

Native Proteins ◽

Global Problems ◽

Physiological And Biochemical

Heavy metals enter the human body through the gastrointestinal tract, skin, or via inhalation. Toxic metals have proven to be a major threat to human health, mostly because of their ability to cause membrane and DNA damage, and to perturb protein function and enzyme activity. These metals disturb native proteins’ functions by binding to free thiols or other functional groups, catalyzing the oxidation of amino acid side chains, perturbing protein folding, and/or displacing essential metal ions in enzymes. The review shows the physiological and biochemical effects of selected toxic metals interactions with proteins and enzymes. As environmental contamination by heavy metals is one of the most significant global problems, some detoxification strategies are also mentioned.

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Plant growth promoting microbes: Potential link to sustainable agriculture and environment

Biocatalysis and Agricultural Biotechnology ◽

10.1016/j.bcab.2019.101326 ◽

2019 ◽

Vol 21 ◽

pp. 101326 ◽

Cited By ~ 11

Author(s):

Kalyani Naik ◽

Snehasish Mishra ◽

Haragobinda Srichandan ◽

Puneet Kumar Singh ◽

Prakash Kumar Sarangi

Keyword(s):

Plant Growth ◽

Sustainable Agriculture ◽

Plant Growth Promoting ◽

Potential Link ◽

Agriculture And Environment ◽

Growth Promoting ◽

Plant Growth Promoting Microbes

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ESR study of copper(II) retention by entire cell, cells walls, and protoplasts of Saccharomyces cerevisiae

Canadian Journal of Microbiology ◽

10.1139/m87-133 ◽

1987 ◽

Vol 33 (9) ◽

pp. 777-782 ◽

Cited By ~ 4

Author(s):

Jean Claude Kihn ◽

Michèle M. Mestdagh ◽

Paul G. Rouxhet

Keyword(s):

Saccharomyces Cerevisiae ◽

Energy Source ◽

Plasma Membrane ◽

Binding Sites ◽

Cell Walls ◽

Outer Face ◽

Whole Cells ◽

Entire Cell ◽

Acidic Conditions ◽

Isolated Cell

Copper retention by whole cells, protoplasts, and isolated cell walls of Saccharomyces cerevisiae was investigated in the absence of any energy source in the medium. The cell walls accounted only for a small fraction of the cation retention by whole cells. ESR results showed that copper was not bound only at the outer face of the plasma membrane, but it was also distributed in the plasma membrane and (or) in the cytoplasm. ESR studies also showed that, in all three systems, copper was chelated by peptides or proteins. The binding sites were formed by an amide and a strongly complexing ligand such as an amine. Their configuration depended upon pH: in slightly acidic conditions, copper was bound by the oxygen of the amide; at basic pH, NHCO became deprotonated and the negatively charged nitrogen bound to the metal.

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How do cell walls regulate plant growth?

Journal of Experimental Botany ◽

10.1093/jxb/eri247 ◽

2005 ◽

Vol 56 (419) ◽

pp. 2275-2285 ◽

Cited By ~ 84

Author(s):

David Stuart Thompson

Keyword(s):

Plant Growth ◽

Cell Walls

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Adhesion of Pseudomonas aeruginosa to human buccal epithelial cells: evidence for two classes of receptors

Canadian Journal of Microbiology ◽

10.1139/m85-105 ◽

1985 ◽

Vol 31 (6) ◽

pp. 563-569 ◽

Cited By ~ 33

Author(s):

David W. McEachran ◽

Randall T. Irvin

Keyword(s):

Binding Sites ◽

Copy Number ◽

Alginic Acid ◽

High Copy Number ◽

Acetylneuraminic Acid ◽

High Affinity ◽

Buccal Epithelial Cells ◽

Low Copy Number ◽

Inhibition Data ◽

Number Class

The adhesion of Pseudomonas aeruginosa strain 492c to trypsinized and untrypsinized buccal epithelial cells (BECs) was studied. Kinetic analysis of the adhesion data, employing a Langmuir absorption isotherm, indicated the presence of two classes of binding sites on untrypsinized BECs: a high affinity – low copy number site (apparent association constant (Ka ≈ 1.57 × 10−8 mL/cell with ca. 29 binding sites/cell) and a low affinity – high copy number class of binding sites (Ka ≈ 4.78 × 10−10 mL/cell with ca. 264 binding sites/cell). The low affinity – high copy number class of sites was found to be trypsin sensitive. A single class of binding sites was found on trypsinized BECs exhibiting a high affinity – low copy number (Ka ≈ 3.70 × 10−7 mL/cell with ca. 31 binding sites/cell). Positive cooperativity in binding of P. aeruginosa strain 492c to the low affinity – high copy number class site on untrypsinized BECs was demonstrated by analysis of Hill plots of the adhesion data. Sugar inhibition data using a preincubation methodology showed an inhibition of adhesion to trypsinized BECs in the presence of N-acetylneuraminic acid and D-arabinose, while these same two sugars enhanced adhesion to untrypsinized BECs. D-Galactose and N-acetylglucosamine enhanced adhesion to both types of BECs though the latter did to different extents. D-Fucose only inhibited adhesion to untrypsinized BECs. Without preincubation the sugar inhibition data indicated that N-acetylglucosamine had no effect on adhesion while N-acetylneuraminic acid and D-fucose both enhanced adhesion to both types of BECs. D-Arabinose had a slight inhibitory effect on adhesion, while D-galactose had a slight enhancing effect to both cell types, but to different levels. This sugar data suggests a difference in the receptors on the two types of BECs, but the possibility of metabolism of these sugars by P. aeruginosa requires one to interpret this data with caution. Flagella were shown not to be involved in adhesion, while the alginic acid of the capsule was implicated. The low copy number binding site is speculated to be a pili-binding site, while the high copy number class of binding sites is proposed to involve a lectin which binds alginic acid.

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High- and low-affinity binding sites for Cd on the bacterial cell walls of Bacillus subtilis and Shewanella oneidensis

Geochimica et Cosmochimica Acta ◽

10.1016/j.gca.2010.02.019 ◽

2010 ◽

Vol 74 (15) ◽

pp. 4219-4233 ◽

Cited By ~ 77

Author(s):

Bhoopesh Mishra ◽

Maxim Boyanov ◽

Bruce A. Bunker ◽

Shelly D. Kelly ◽

Kenneth M. Kemner ◽

...

Keyword(s):

Bacillus Subtilis ◽

Binding Sites ◽

Bacterial Cell ◽

Cell Walls ◽

Shewanella Oneidensis ◽

Affinity Binding ◽

Bacterial Cell Walls

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Multiscale Models in the Biomechanics of Plant Growth

Physiology ◽

10.1152/physiol.00030.2014 ◽

2015 ◽

Vol 30 (2) ◽

pp. 159-166 ◽

Cited By ~ 17

Author(s):

Oliver E. Jensen ◽

John A. Fozard

Keyword(s):

Plant Physiology ◽

Plant Growth ◽

Cell Walls ◽

Adherent Cells ◽

Multiscale Models ◽

Multiple Cell

Plant growth occurs through the coordinated expansion of tightly adherent cells, driven by regulated softening of cell walls. It is an intrinsically multiscale process, with the integrated properties of multiple cell walls shaping the whole tissue. Multiscale models encode physical relationships to bring new understanding to plant physiology and development.

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Cotton aphid feeding preference and the development of watermelon plants treated with silicon

Revista de Ciências Agroveterinárias ◽

10.5965/223811712022021170 ◽

2021 ◽

Vol 20 (2) ◽

pp. 170-174

Author(s):

Rosane Rodrigues da Costa Pereira ◽

Mara Pestana Leite ◽

Douglas Marcelo Pinheiro da Silva ◽

Ronelza Rodrigues da Costa Zaché ◽

Carlos Eduardo Pereira

Keyword(s):

Plant Growth ◽

Growth And Development ◽

Block Design ◽

Aphis Gossypii ◽

Preference Test ◽

Feeding Preference ◽

Plant Growth And Development ◽

Cotton Aphid ◽

Randomized Design ◽

Agriculture And Environment

The cotton aphid is one of the main watermelon crop pests and may cause a reduction in productivity due to the suction of sap, the transmission of viruses, and decreased photosynthetic capacity. The objective of this research was to evaluate the feeding preference of the aphid Aphis gossypii and the biometric aspects of watermelon cultivar plants submitted to silicon application. The experiment was conducted at the Institute of Education, Agriculture, and Environment of the Federal University of Amazonas, in Humaitá, Brazil. A randomized complete block design was used for testing preference with choice and a completely randomized design to study the biometric parameters of the plants. The treatments were distributed in a 2 x 3 factorial scheme (with and without silicon and considering cultivars Crimson Sweet, Fairfax, and Charleston). Silicic acid was applied at a 1% concentration directly on the substrate around the plants (equivalent to 1 t SiO2 ha-1), 25 days after sowing. The aphids in the breeding were kept in cucumber plants of cultivar Caipira. The treatments were evaluated through the preference test on watermelon cultivars and biometric studies of plant growth and development. The data were submitted to an analysis of variance, and the means were compared using the F and Scott-Knott tests at the 5% probability level. Silicon does not affect the preference of Aphis gossypii in different watermelon cultivars and negatively affects plant growth and development.

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Biochar: a potential soil ameliorant for sustainable land, agriculture and environmental development

10.22541/au.161884210.06764839/v1 ◽

2021 ◽

Author(s):

Sanat Dwibedi ◽

VC Pandey ◽

Donakonda Divyasree

Keyword(s):

Plant Growth ◽

Sustainable Agriculture ◽

Environmental Remediation ◽

Crop Production ◽

Synergistic Effects ◽

Conservation Agriculture ◽

Chemical Conversion ◽

Long Term Effects ◽

Soil Microbial ◽

Economically Deprived

Biochar or pyrogenic carbon, obtained from thermo-chemical conversion of biomass in an anaerobic or oxygen limited environment has been in use in agriculture since long back to Neolithic era. Its unique soil ameliorating properties, render it suitable for environmental remediation as well as sustainable crop production. It improves soil physicochemical properties and plant nutrient availability, facilitates biodiversity, and reduces emission of greenhouse gases, thereby subsiding global warming. Application of biochar reduces soil erosion, improves soil hydrological properties, and soil microbial dynamics. It has synergistic effects on plant growth, disease-pest resistance, and crop yield per unit area and time. Due to its soil ameliorative effects, and soil and water conserving ability, it can very well be used in organic farming, pemaculture, dryland farming, conservation agriculture, and land remediation. Cheaper production cost, simple and easy pyrolytic technologies, easy availability of feedstock and bio-wastes in many developing countries and its long-term effects in soil not only build up soil carbon pool but also help support small and marginal farmers in resource-rich but economically deprived countries for sustainable agriculture and environment. In this review, efforts have been made to elucidate various methods of biochar synthesis, its characteristics and effects on soil properties, and plant growth and development, its role in sustainable agriculture and remediation of the environment.

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