Pb-induced phytotoxicity in para grass (Brachiaria mutica) and Castorbean (Ricinus communis L.): Antioxidant and ultrastructural studies

Chemosphere
Muhammad Moman KhanDan Liu

Abstract

Hydroponics experiment was conducted to investigate the effects of different levels of Pb on Para Grass (Brachiaria mutica) and Castorbean (Ricinus communis L). Generally, Para Grass exhibited higher tolerance to excessive concentrations of Pb in nutrient solution, whereas a consistent decline was observed in growth of Castorbean plants exposed to similar Pb levels. Malondialdehyde (MDA) and H2O2 contents exhibited contrasting results with a general decrease in Para Grass and a linear increase in case of Castorbean. In both species a decrease was noticed in the activities of superoxide dismutase (SOD) and guaiacol peroxidase (G-POD) while catalase (CAT) activity was significantly increased. Ultrastructural studies revealed increased starch grains and adversely affected thylakoid membranes in chloroplasts of leaf cells of plants treated with 500 μM Pb. Photosynthetic parameters such as CO2 assimilation rate, stomatal conductance (gs) and transpiration rate (E) decreased in both plant species under different levels of Pb. Maximum concentrations of Pb in shoots of Para Grass and Castorbean were 1.29 and 0.352 g kg-1, respectively while in roots maximum values were 8.88 and 49.86 g kg-1, respectively. The high concentrations of Pb ...Continue Reading

References

Oct 18, 2001·Journal of Experimental Botany·L M SandalioL A del Río
Feb 1, 1977·Plant Physiology·C N Giannopolitis, S K Ries
Feb 23, 2008·Bulletin of Environmental Contamination and Toxicology·Jia-Nv LiuSong Wang
Jul 25, 2009·Journal of Hazardous Materials·D K GuptaR D Tripathi
Aug 29, 2014·Ecotoxicology and Environmental Safety·Muhammad Bilal ShakoorGhulam Hasan Abbasi

❮ Previous
Next ❯

Citations

May 16, 2019·Environmental Science and Pollution Research International·Xiaohan XuHanqi Yang
Dec 7, 2019·Environmental Science and Pollution Research International·Xiupei ZhouHongqing Hu
Mar 19, 2020·International Journal of Molecular Sciences·Krzysztof M TokarzStanisław Mazur
Mar 25, 2020·International Journal of Molecular Sciences·Eugeniusz MałkowskiPaulina Zieleźnik-Rusinowska
Jan 25, 2021·Environmental Geochemistry and Health· NatashaMazhar Saleem
Feb 3, 2021·Environmental Science and Pollution Research International·Anindita MitraDharmendra K Gupta
Jul 17, 2021·Chemosphere·Helen C S AmorimMaurício P F Fontes

❮ Previous
Next ❯

Related Concepts

Related Feeds

Bioremediation (ASM)

Bioremediation is the treatment and removal of harmful pollutants or contaminants through the use of microorganisms. Discover the latest research here.