PJB-2017-926
Bacteria priming alleviates the negative impacts of arsenic on the biochemical, metabolic and anti-oxidative parameters of rice (Oryza sativa L.)
Sehresh Khan
Abstract
Arsenic (As) is a potential contaminants of groundwater as well as soil, which is increasing in alarming rate in rice (Oryza sativa L.) growing areas in developing countries including Pakistan. In current study, two bacterial strains (Bacillus Clausii NCCP-82, Bacillus Safensis NCCP-74) were used to alleviate As accumulation in rice against different arsenic concentration (0, 50, 100 and 150ppm). Bioaccumulation of arsenic assay showed that both the strain exhibit different arsenic accumulation capacity but strain NCCP-74 accumulate higher amount of arsenic as compare to NCCP-82. Result revealed drastic effect of arsenic on plant growth and photosynthetic pigment. Gradual increase in metabolic and antioxidant content was observed under arsenic stress. Prominent increased in cellular injury and arsenic content was observed with increasing As stress, whereas considerable decreased was observed in microbe mediated priming plants. It was concluded that both the strains were beneficial in alleviation of arsenic stress in rice by improving biochemical and metabolic parameters.
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