Comparative Study of Heavy Metal Uptake and Analysis of Plant Growth Promotion Potential of Multiple Heavy Metal-Resistant Bacteria Isolated From Arable Land

2021 ◽  
Vol 79 (1) ◽  
Author(s):  
Jayanti Saha ◽  
Monalisha Sarkar ◽  
Parimal Mandal ◽  
Ayon Pal
Keyword(s):  
Heavy Metal ◽  
Plant Growth ◽  
Comparative Study ◽  
Plant Growth Promotion ◽  
Metal Uptake ◽  
Growth Promotion ◽  
Arable Land ◽  
Resistant Bacteria ◽  
Heavy Metal Uptake ◽  
Heavy Metal Resistant

Plant Growth Promotion Potential of Heavy Metal Resistant Bacteria From The Sewage Contaminated Coovum River, Chennai, India

2014 ◽  
Vol 11 (SE) ◽  
pp. 149-158
Author(s):  
M. Jayaprakashvel ◽  
N. Imran Sheriff ◽  
M. Venkatramani ◽  
S. Vinothini ◽  
A. Jaffar Hussain
Keyword(s):  
Heavy Metal ◽  
Plant Growth ◽  
Plant Growth Promotion ◽  
Growth Promotion ◽  
Resistant Bacteria ◽  
Heavy Metal Resistant

scholarly journals Effects of Soil Amendments on Heavy Metal Immobilization and Accumulation by Maize Grown in a Multiple-Metal-Contaminated Soil and Their Potential for Safe Crop Production

Toxics ◽  
2020 ◽  
Vol 8 (4) ◽  
pp. 102
Author(s):  
Fayuan Wang ◽  
Shuqi Zhang ◽  
Peng Cheng ◽  
Shuwu Zhang ◽  
Yuhuan Sun
Keyword(s):  
Heavy Metal ◽  
Plant Growth ◽  
Contaminated Soil ◽  
Crop Production ◽  
Metal Uptake ◽  
Soil Amendments ◽  
Heavy Metal Uptake ◽  
X Ray ◽  
Metal Immobilization ◽  
Heavy Metal Immobilization

Soil amendments have been proposed for immobilizing metallic contaminants, thus reducing their uptake by plants. For the safe production of crops in contaminated soil, there is a need to select suitable amendments that can mitigate heavy metal uptake and enhance crop yield. The present experiment compared the effects of three amendments, hydroxyapatite (HAP), organic manure (OM), and biochar (BC), on plant growth and heavy metal accumulation by maize in an acidic soil contaminated with Cd, Pb, and Zn, and their potential for safe crop production. Toxicity characteristic leaching procedure (TCLP) tests, energy dispersive X-ray spectroscopy (EDS) analysis, and X-ray diffraction (XRD) analysis were used to evaluate the effectiveness and mechanisms of heavy metal immobilization by the amendments. The results showed that shoot and root biomass was significantly increased by HAP and 1% OM, with an order of 1% HAP > 0.1% HAP > 1% OM, but not changed by 0.1% OM and BC (0.1% and 1%). HAP significantly decreased Cd, Pb, and Zn concentrations in both shoots and roots, and the effects were more pronounced at the higher doses. OM decreased the shoot Cd and Pb concentrations and root Zn concentrations, but only 1% OM decreased the shoot Zn and root Pb concentrations. BC decreased the shoot Cd and Pb concentrations, but decreased the shoot Zn and root Pb concentrations only at 1%. HAP decreased the translocation factors (TFs) of Cd, Pb, and Zn (except at the 0.1% dose). OM and BC decreased the TFs of Cd and Zn, respectively, at the 1% dose but showed no significant effects in other cases. Overall, plant P, K, Fe, and Cu nutrition was improved by HAP and 1% OM, but not by 0.1 OM and BC. Soil pH was significantly increased by HAP, 1% OM, and 1% BC, following an order of 1% HAP > 1% OM > 0.1% HAP > 1% BC. The TCLP levels for Cd, Pb, and Zn were significantly reduced by HAP, which can be partly attributed to its liming effects and the formation of sparingly soluble Cd-, Pb-, and Zn-P-containing minerals in the HAP-amended soils. To some extent, all the amendments positively influenced plant and soil traits, but HAP was the optimal one for stabilizing heavy metals, reducing heavy metal uptake, and promoting plant growth in the contaminated soil, suggesting its potential for safe crop production.

scholarly journals Heavy Metal Uptake by Novel Miscanthus Seed-Based Hybrids Cultivated in Heavy Metal Contaminated Soil

2017 ◽  
Vol 26 (3) ◽  
pp. 121-132 ◽  
Author(s):  
Jacek Krzyżak ◽  
Marta Pogrzeba ◽  
Szymon Rusinowski ◽  
John Clifton-Brown ◽  
Jon Paul McCalmont ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Contaminated Soils ◽  
Metal Uptake ◽  
Plant Density ◽  
Arable Land ◽  
Growing Season ◽  
Heavy Metal Uptake ◽  
Aqua Regia ◽  
Miscanthus Giganteus ◽  
Commercial Opportunity

Abstract When heavy metal contaminated soils are excluded from food production, biomass crops offer an alternative commercial opportunity. Perennial crops have potential for phytoremediation. Whilst the conditions at heavy metal contaminated sites are challenging, successful phytoremediation would bring significant economic and social benefits. Seed-based Miscanthus hybrids were tested alongside the commercial clone Miscanthus × giganteus on arable land, contaminated with Pb, Cd and Zn near Katowice. Before the randomized experimental plots were established (25m2 plots with plant density 2/m2) ‘time-zero’ soil samples were taken to determine initial levels of total (aqua regia) and bioavailable (CaCl2 extraction) concentration of Pb, Cd and Zn. After the growing season plant material was sampled during autumn (October, green harvest) and winter (March, brown harvest) to determine differences in heavy metal uptake. Results after the first growing season are presented, including the plot establishment success, biomass yield and heavy metal uptake.

scholarly journals Plant growth promotion by Bradyrhizobium japonicum under heavy metal stress

2016 ◽  
Vol 105 ◽  
pp. 19-24 ◽  
Author(s):  
M. Seneviratne ◽  
S. Gunaratne ◽  
T. Bandara ◽  
L. Weerasundara ◽  
N. Rajakaruna ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Plant Growth ◽  
Plant Growth Promotion ◽  
Bradyrhizobium Japonicum ◽  
Growth Promotion ◽  
Heavy Metal Stress ◽  
Metal Stress
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