scholarly journals The Effect of Endophytic Talaromyces pinophilus on Growth, Absorption and Accumulation of Heavy Metals of Triticum aestivum Grown on Sandy Soil Amended by Sewage Sludge

Plants ◽  
2021 ◽  
Vol 10 (12) ◽  
pp. 2659
Author(s):  
Amany A. El-Shahir ◽  
Noha A. El-Tayeh ◽  
Omar M. Ali ◽  
Arafat Abdel Hamed Abdel Latef ◽  
Naglaa Loutfy
Keyword(s):  
Heavy Metals ◽  
Triticum Aestivum ◽  
Sewage Sludge ◽  
Plant Growth ◽  
Soluble Sugars ◽  
Growth Media ◽  
Enzymatic Antioxidants ◽  
Talaromyces Pinophilus ◽  
Total Amino Acids

Sewage sludge improves agricultural soil and plant growth, but there are risks associated with its use, including high heavy metal content. In this study, experiments were carried out to investigate the role of endophytic Talaromyces pinophilus MW695526 on the growth of Triticum aestivum cultivated in soil amended with sewage sludge and its phytoremediation ability. T. pinophilus could produce gibberellic acid (GA) and stimulate T. aestivum to accumulate GA. The results showed that inoculation with T. pinophilus boosted plant growth criteria, photosynthetic pigments, osmolytes (soluble proteins, soluble sugars and total amino acids), enzymatic antioxidants (catalase, superoxide dismutase and peroxidase), K, Ca and Mg. On the other hand, it reduced Na, Na/K ratio, Cd, Ni, Cu and Zn in the growth media as well as in the shoot and root of T. aestivum. The results suggest that endophytic T. pinophilus can work as a barrier to reduce the absorption of heavy metals in T. aestivum cultivated in soil amended with sewage sludge.

Newer Approaches in Phytoremediation

2021 ◽  
pp. 1785-1808
Author(s):  
Khushboo Chaudhary ◽  
Suphiya Khan ◽  
Pankaj Kumar Saraswat
Keyword(s):  
Heavy Metals ◽  
Plant Growth ◽  
Chelating Agents ◽  
Plant Growth Promoting Bacteria ◽  
Metals Removal ◽  
Pollution Problem ◽  
The World ◽  
Plant Growth Promoting ◽  
Growth Promoting

The heavy metal pollution problem is all over the world. Plant-growth-promoting bacteria (PGPB) has transformed heavy metals present in the soil, which removes and minimizes their toxic effects. This chapter highlights the role of plant-growth-promoting bacteria, chelating agents, and nanoparticles for remediation of heavy metals; their mechanism of action; and their applications approach of hyperaccumulation. Therefore, this chapter focuses on the mechanisms by which microorganisms, chelating agents, and nanoparticles can mobilize or immobilize metals in soils and the nano-phytoremediation strategies are addressed for the improvement of phytoextraction as an innovative process for enhancement of heavy metals removal from soil.

scholarly journals Characterization of Sewage Sludge for Quality Assessment and Its Safe Utilization in Agriculture

2021 ◽  
pp. 28-35
Author(s):  
Surendra Singh Jatav ◽  
Satish Kumar Singh ◽  
Abhik Patra ◽  
Hanuman Singh Jatav ◽  
Kiran Kumar Mohapatra ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Sewage Sludge ◽  
Plant Growth ◽  
Environmental Concern ◽  
Biochemical Properties ◽  
Agricultural Field ◽  
Soil Environment ◽  
Toxic Heavy Metals ◽  
Soil Application ◽  
Physical Chemical

The current investigation was undertaken to explore the physico-biochemical properties of sewage sludge (SS) and its feasible application in agricultural field as an organic manure as source of nutrients with to solve the environmental concern. Sewage sludge samples were collected from sewage treatment plants (STP), Bhagwanpur, Varanasi, Uttar Pradesh, India and passed through a 2 mm sieve for further analysis of different physical, chemical and biological parameters. The treated sewage sludge consists of both major and micro nutrients along with a good amount of organic matter. Application of this sewage sludge has the ability to enhance the physical, chemical and biological properties of soil which is beneficial for plant growth and development sustainable soil environment. However, it also contains some amount of toxic heavy metals and organic pollutants that can adversely affect soil environment depending on the origin source of sewage sludge, and treatment process of sewage sludge. Furthermore, the toxic elements go through the food chain due to its uptake and accumulation by crops posing a possible threat to human health. Sewage sludge application in soil offers essential nutrients particularly for plant growth, maintains the organic carbon in soil and decreases environmental concern with economic factors that restrict landfill or incineration disposal of sewage sludge. However, a careful assessment of the characteristics of sewage sludge is required prior to its soil application to improve the soil health without causing environmental hazard. The SS analyzed in the present study had heavy metals content but was within permissible limits as resulted its suitable for soil application as source of nutrients.

Role of Plant Growth Promoting Bacteria (PGPB) for Bioremediation of Heavy Metals

2018 ◽  
pp. 104-125 ◽  
Author(s):  
Khushboo Chaudhary ◽  
Suphiya Khan
Keyword(s):  
Heavy Metals ◽  
Plant Growth ◽  
Toxic Effects ◽  
Plant Growth Promoting Bacteria ◽  
Cellular Mechanisms ◽  
Metals Removal ◽  
Pollution Problem ◽  
Plant Growth Promoting ◽  
Growth Promoting

The heavy metal pollution problem is all over the world. Plant growth promoting bacteria (PGPB) has transformed heavy metals present in the soil, which removes and minimizes their toxic effects. This chapter highlights the role of PGPB for remediation of heavy metals, their mechanism of action, and their applications approach of hyperaccumulation. Further, it also highlights the role of uptake and detoxification of metals by cellular mechanisms which facilitate the bioremediation of heavy metals from contaminated areas. Bacteria may also enhance nutrient uptake, increasing plant growth and defenses while diminish heavy metals intake and their toxic effects. Therefore, this chapter focuses on the mechanisms by which microorganisms can mobilize or immobilize metals in soils and the bioremediation strategies are addressed for the improvement of phytoextraction as an innovative process for enhancement of heavy metals removal from soil.

Newer Approaches in Phytoremediation

2020 ◽  
pp. 145-178
Keyword(s):  
Heavy Metals ◽  
Plant Growth ◽  
Chelating Agents ◽  
Plant Growth Promoting Bacteria ◽  
Metals Removal ◽  
Pollution Problem ◽  
The World ◽  
Plant Growth Promoting ◽  
Growth Promoting

The heavy metal pollution problem is all over the world. Plant-growth-promoting bacteria (PGPB) has transformed heavy metals present in the soil, which removes and minimizes their toxic effects. This chapter highlights the role of plant-growth-promoting bacteria, chelating agents, and nanoparticles for remediation of heavy metals; their mechanism of action; and their applications approach of hyperaccumulation. Therefore, this chapter focuses on the mechanisms by which microorganisms, chelating agents, and nanoparticles can mobilize or immobilize metals in soils and the nano-phytoremediation strategies are addressed for the improvement of phytoextraction as an innovative process for enhancement of heavy metals removal from soil.

scholarly journals Role of biochar, compost and plant growth promoting rhizobacteria in the management of tomato early blight disease

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Mujahid Rasool ◽  
Adnan Akhter ◽  
Gerhard Soja ◽  
Muhammad Saleem Haider
Keyword(s):  
Plant Growth ◽  
Early Blight ◽  
Alternaria Solani ◽  
Plant Growth Promoting Rhizobacteria ◽  
Application Rate ◽  
Growth Media ◽  
Soil Substrate ◽  
Plant Growth Promoting ◽  
Growth Promoting

AbstractThe individual role of biochar, compost and PGPR has been widely studied in increasing the productivity of plants by inducing resistance against phyto-pathogens. However, the knowledge on combined effect of biochar and PGPR on plant health and management of foliar pathogens is still at juvenile stage. The effect of green waste biochar (GWB) and wood biochar (WB), together with compost (Comp) and plant growth promoting rhizobacteria (PGPR; Bacillus subtilis) was examined on tomato (Solanum lycopersicum L.) physiology and Alternaria solani development both in vivo and in vitro. Tomato plants were raised in potting mixture modified with only compost (Comp) at application rate of 20% (v/v), and along with WB and GWB at application rate of 3 and 6% (v/v), each separately, in combination with or without B. subtilis. In comparison with WB amended soil substrate, percentage disease index was significantly reduced in GWB amended treatments (Comp + 6%GWB and Comp + 3%GWB; 48.21 and 35.6%, respectively). Whereas, in the presence of B. subtilis disease suppression was also maximum (up to 80%) in the substrate containing GWB. Tomato plant growth and physiological parameters were significantly higher in treatment containing GWB (6%) alone as well as in combination with PGPR. Alternaria solani mycelial growth inhibition was less than 50% in comp, WB and GWB amended growth media, whereas B. subtilis induced maximum inhibition (55.75%). Conclusively, the variable impact of WB, GWB and subsequently their concentrations in the soil substrate was evident on early blight development and plant physiology. To our knowledge, this is the first report implying biochar in synergism with PGPR to hinder the early blight development in tomatoes.

scholarly journals ROLE OF RHIZOBACTERIA IN PHYTOREMEDIATION OF HEAVY METALS

2020 ◽  
Vol 2020 (1) ◽  
Author(s):  
N Nadeem ◽  
R Asif ◽  
S Ayyub ◽  
S Salman ◽  
F Shafique ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Plant Growth ◽  
Soil Fertility ◽  
Plant Growth Promoting Rhizobacteria ◽  
Heavy Metal Accumulation ◽  
Plant Tolerance ◽  
Plant Growth Promoting ◽  
Growth Promoting ◽  
Nickel Lead

Rhizobacteria, a plant growth promoting rhizobacteria (PGPR) as beneficial microorganism which helps in defense from abiotic and abiotic stresses, colonizes in rhizosphere and played a major role in promoting plant growth and also provides enhance soil fertility. In the highly contaminated soil, the content of metal exceeds the limits of plant tolerance. It is also possible that treatment of plant with PGPR, here increasing the biomass of plant, stabilizing and the remediation of metal polluted soil. The use of rhizobacteria plays and important role in increasing the tolerance of plant towards toxic effects of heavy metals like arsenic, sulphur, mercury, chromium, cadmium, nickel, lead and copper etc. Heavy metal accumulation results in deterioration of soil fertility while PGPR helps to restore soil fertility. The process of phytoremediation has been proved to be the best way to remediate heavy metals from soil. The use of rhizobacteria with plants provides highly efficiency phytoremediation. However, there is still need to understanding the concept of microbial ecological study in rhizosphere and mechanism of detoxification of heavy metals form rhizosphere.

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