Growth, photosynthesis, active oxygen species and antioxidants responses of paddy field cyanobacterium Plectonema boryanum to endosulfan stress

Photosynthetic, Biochemical and Enzymatic Investigation of Azolla microphylla in Response to an Insecticide-Hexachlorohexahydro-Methano-Benzodioxathiepine-Oxide

“…The pesticides are known to inhibit chlorophyll biosynthesis particularly by inhibiting δ-aminolevuliniceacid dehydrogenase and protochlorophyllide reductase (Dubey, 1997). Under stress conditions carotenoid pigments are less affected than chlorophyll resulting in a low chlorophyll/carotenoid ratio, and results are obtained in Azolla fronds treated with pesticides and are in consequences with earlier findings (Prasad et al, 2005). Since carotenoids are less affected, it also act as an antioxidant metabolite (Chris et al, 2006;Dai et al, 2006), it protects chlorophyll and photosynthetic membrane from oxidative damage, therefore decline in carotenoids could have serious consequences on chlorophyll as well as thylakoid membrane which may lead to reduction in photosynthetic capability of A. microphylla.…”

Chlorpyrifos degradation by the cyanobacterium Synechocystis sp. strain PUPCCC 64

“…Considerable amount of work has been reported related to pesticide-induced inhibitory effects on growth, photosynthetic pigments, photosynthesis, and nitrogen fixation in cyanobacteria (Mohapatra et al 2003;Jha and Mishra 2005;Prasad et al 2005;Singh and Datta 2006;Chen et al 2007). A few reports are also available for pesticides degradation by cyanobacteria (Lee et al 2003; Barton et al 2004;El-Bestawy et al 2007;Cáceres et al 2008).…”

Evaluation of oxidative stress in Vigna radiata L. in response to chlorpyrifos

“…Insecticide-induced oxidative stress was shown to alter the cellular redox balance by altering ascorbate-glutathione (Asc-Glu) cycle or damaging other antioxidant defense systems (Bashir et al 2007b). Plants have multiple strategies to confer their tolerance to insecticide-induced toxicity, and prevention of oxidative damage to cells has been suggested as one of the mechanisms of stress tolerance (Saraf and Sood 2002;Prasad et al 2005). The antioxidant machinery is composed of enzymes and non-enzymatic components.…”