Bacillus Cereus Enhanced Phytoremediation Ability of Rice Seedlings under Cadmium Toxicity

Abstract

Cadmium (Cd+2) is a highly toxic metal, which significantly alters different biochemical and metabolic processes in plants. Massive amounts of Cd+2 is being released into the environment by different anthropogenic activities. In the present study, plant growth promoting activities of bacterial strain Bacillus cereus was evaluated under Cd+2 stress in two rice cultivars Basmati-385 and Shaheen Basmati. Cd+2 stress significantly decreased plant growth and biomass production in both cultivars. However, with the inoculation of B. cereus under Cd+2 treatments, reduced Cd+2 uptake and increased antioxidant enzymes activities in rice cultivars lead to enhanced plant growth, biomass production, photosynthetic pigments, micronutrients, and lowered electrolytes leakage. This study suggests that B. cereus has the ability to alleviating Cd toxicity and increased phytoremediation efficiency of rice seedling under Cd stress.

Changes in diversity and composition of rhizosphere bacterial community during natural restoration stages in antimony mine

“…Furthermore, Bacillus thuringiensis X30 can decrease the toxicity of Cu and Pb to plants and increase the biomass of crops (Han et al, 2018). Under Cd stress, Bacillus can promote rice growth, increase its biomass, photosynthetic pigment and micronutrient content, and reduce electrolyte permeability (Jan et al, 2019). Based on these results, we believe that Bacillus has a certain preference for heavy metal pollution, which can reduce the ecological toxicity of heavy metal and promote the growth of plants.…”

Plant Growth-Promoting Bacteria as a Natural Resource for Sustainable Rice Production under the Soil Salinity, Wastewater, and Heavy Metal Stress

“…Plant growth [7,15,21,22,25,26,49] Soil Rhizobacteria Heavy metals [50][51][52][53][54] Azospirillum N 2 fixing [55] Arbuscular mycorrhizal symbiosis and Pseudomonas putida Salinity stress; biological control; drought stress [20,29,56,57] PGPR Cu-contaminated [43,58] Exogenous application Cd-contaminated [10,59,60] Genomic rice Cr-contaminated [61] Ochrobactrum sp. and Bacillus spp.…”

“…Promoting plant growth (PGP) has numerous correlation capabilities either by endophyte in plant tissue [5], rhizosphere in seed surface as well as plant root [6], symbiosis in root nodules, and phyllosphere in stem and/or leaf surface (Turner). PGPB involve 1-aminocyclopropane-l-carboxylic acid (ACC) deaminase that is applied to seedling which could effectively stimulate plant growth by reducing plant ethylene rates [7] under drought, salinity [8,9], flooding, and contaminant condition [10] and increasing phosphate solubility and availability in soil, along with the increase in plant biomass, root area, and total N and P contents in rice [11].…”

Alleviation of cadmium stress in rice by inoculation of Bacillus cereus

“…Numerous procedures, such as ion exchange, adsorption, or coagulation-flocculation, are available to remove Cd from Cd-contaminated regions. However, they are expensive and require high amounts of energy consumption as they rely on transforming the soil into different phases ( Jan et al, 2019 ). Bioremediation, which involves the use of microorganisms to break down or removes environmental pollutants from a given area, is a much more economical and eco-friendly method of reducing Cd contamination.…”