Endosulfan induced biochemical changes in nitrogen-fixing cyanobacteria

Photosynthetic Response of Two Rice Field Cyanobacteria to Pesticides

“…The pesticides are known to interfere with the synthesis of Chl a pigment by inhibiting the formation of porphyrin rings (Moreland, 1980;Lal and Saxena, 1980). In the present work, the low level of Chl in pesticide treated samples supports the observations of Das & Adhikary, 1996, Megharaj et al, 2011, Kumar et al, 2008, Battah et al, 2001Sikha &Singh, 2004 andXia, 2005. …”

“…These findings support the observation of Das and Adhikary, 1996 that organophosphate insecticide is less toxic than organocholorine. Several authors (Rath & Adhikary, 1994;Goyal et al, 1994;Das & Adhikary, 1996;Anand & Subramanian 1997;Kaur & Ahluwalia, 1997;Kapoor & Arora, 1998;a, 2000bXia, 2005;Chen et al,2007;Kumar et al,2008;Bhattacharyya et al, 2011) have reported inhibitory effect of various pesticides on the growth of cyanobacteria. The inhibition of growth in different concentrations of the pesticides is due to alteration in synthesis of nucleic acids, amino acids and proteins (Kumar et al, 2011) as well as due to impairment in photosynthetic activity (Lal & Saxena, 1980) of the BGA.…”

“…respectively. Significant high levels of polarization suggests a greater disorganization of thylakoid membrane due to high lipid peroxidation (Kumar et al, 2008).…”

Allelopathic mechanism of pyrogallol to Microcystis aeruginosa PCC7806 (Cyanobacteria): From views of gene expression and antioxidant system

“…It is well known that most environmental stress affect production of active oxygen species in plants and therefore cause oxidative stress (Smirnoff, 1993). Cellular activities of SOD and CAT have always been reported to be elevated under oxidant stress, and nitrogenfixing cyanobacteria have been found to increase both SOD and CAT activities under endosulfan stress (Kumar et al, 2008). Copper stress, could also stimulate activities of SOD and CAT in green alga Pavlova viridis (Li et al, 2006).…”

Physiological and biochemical responses of a marine diatom Phaeodactylum tricornutum exposed to 1-octyl-3-methylimidazolium bromide

“…35.9, 58.5, 123.3, 197.7, and 207.0% in the 5, 10, 20, 40, and 80 mg l −1 [C 8 mim]Br treatments relative to the controls, respectively. Enzymes, including antioxidant and biotransformation enzymes, are important components in soluble proteins, and may serve as an active defense mechanism to protect cells from [C 8 mim]Br stress (Kumar et al 2008 (Fig. 5).…”