Chlorella sp. modulates the glutathione mediated detoxification and S-adenosylmethionine dependent methyltransferase to counter arsenic toxicity in Oryza sativa L

Autor: Shyam Narayan Pandey, Ambedkar Gautam, Arvind Kumar Dubey, Ruma Ranjan, Shekhar Mallick, Navin Kumar
Jazyk: angličtina
Rok vydání: 2021
Předmět:
Glutathione-S-transferase
S-Adenosylmethionine
Methyltransferase
Antioxidant
Health
Toxicology and Mutagenesis
medicine.medical_treatment
Chlorella sp
Glutaredoxin
SAMT
0211 other engineering and technologies
Chlorella
02 engineering and technology
010501 environmental sciences
01 natural sciences
Antioxidants
Environmental pollution
Arsenic
chemistry.chemical_compound
medicine
Soil Pollutants
Oryza sativa L
GE1-350
0105 earth and related environmental sciences
021110 strategic
defence & security studies
Oryza sativa
biology
Arsenic toxicity
Public Health
Environmental and Occupational Health
food and beverages
Oryza
Hydrogen Peroxide
Methyltransferases
General Medicine
Glutathione
Pollution
Molecular biology
Environmental sciences
Oxidative Stress
Glutathione S-transferase
chemistry
TD172-193.5
Seedlings
Toxicity
biology.protein
Zdroj: Ecotoxicology and Environmental Safety, Vol 208, Iss, Pp 111418-(2021)
ISSN: 0147-6513
Popis: The present study investigates the role of Chlorella sp. in the mitigation of arsenic (iAs) induced toxicity in Oryza sativa L. The study shows, co-culture of rice seedlings with Chlorella sp. reduced the iAs accumulation, simultaneously improving the growth of seedlings under iAs treatments. While treatment with As(III) and As(V) (60 µM) alone, inflicted toxicity in rice seedlings, manifested as significant enhancement in stress markers levels (TBRAS and H2O2), this coincided with the shifting of cellular reduced state to oxidized state (reduced GSH/GSSG ratio). Contrarily, co-culturing rice seedlings with Chlorella sp. under iAs toxicity, reduced these stress markers and recovered the GSH/GSSG ratio. The GSH dependent antioxidant enzymes i.e. GR and GPX activities also exhibited significant enhancement upon co-culturing rice seedlings with Chlorella sp. against iAs stress. Simultaneously, the expression of four thiol dependent GRX genes, i.e. GRX13950, GRX35340, GRX12190 and GRX07950 were enhanced against As(III) and As(V) (60 µM), which reduced upon co-culturing with Chlorella sp. A similar trend was also observed with the expression of GST genes, where the co-culture with Chlorella sp. significantly reduced the genes expression of two isoforms (GST 38600 and GST 38610). On the contrary, the expression of S-adenosylmethionine dependent methyltransferases (SAMT) gene in rice seedlings was enhanced upon co-culturing with the Chlorella sp. against iAs stress. Overall, the results demonstrate that the rice seedlings when co-culture with Chlorella sp. ameliorates iAs toxicity through GSH dependent detoxification pathway, evident from the enhanced expression of GRX, GST, SAMT genes and activity of GSH dependent antioxidant enzymes (GR and GPX) in the rice seedlings.
Databáze: OpenAIRE
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