2016
DOI: 10.11648/j.cb.20160403.11
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Spermidine Enhances Activities of Detoxification Enzymes in Onion (<i>Allium cepa</i> L.) Seedlings Under Short Term Salinity

Abstract: Abstract:In plant, glyoxalases [glyoxalase I (Gly-I, EC: 4.4.1.5) and glyoxalase II (Gly-II, EC: 3.1.2.6)] and glutathione Stransferase (GST, EC: 2.5.1.18) are major detoxification enzymes. On the other hand, spermidine (Spd) is important polyamine (PA) with significant role which interacts with stress protection mechanisms functioning in common against different types of stress. In this study, exogenous Spd was applied on onion seedlings to investigate its protective role through regulation of glyoxalase and … Show more

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Cited by 2 publications
(5 citation statements)
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“…In addition, GST activity allows GSTs to detoxify electrophilic compounds by catalyzing their conjugation to GSH, while GSH peroxidase (GPX) activity allows GSTs to directly detoxify lipid and DNA peroxidation products (Marrs, 1996). Therefore, it is also possible that the induced accumulation of GST in the present study as well as induced GST activity in our previous study (Islam et al, 2016) could detoxify HNE as well as MDA, another natural lipid peroxidation product, under saline stress condition. Moreover, GST may be involved in program cell death like leaf senescence (Kunieda et al, 2005).…”
Section: Resultsmentioning
confidence: 65%
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“…In addition, GST activity allows GSTs to detoxify electrophilic compounds by catalyzing their conjugation to GSH, while GSH peroxidase (GPX) activity allows GSTs to directly detoxify lipid and DNA peroxidation products (Marrs, 1996). Therefore, it is also possible that the induced accumulation of GST in the present study as well as induced GST activity in our previous study (Islam et al, 2016) could detoxify HNE as well as MDA, another natural lipid peroxidation product, under saline stress condition. Moreover, GST may be involved in program cell death like leaf senescence (Kunieda et al, 2005).…”
Section: Resultsmentioning
confidence: 65%
“…Onion is a model crop for GST showing higher GSH dependent detoxification enzymatic activity than other vegetable crops (Rohman et al, 2009). In our previous study, Spd up-regulated glutathione and ascorbic dependent enzymatic antioxidants in onion leaves conferring tolerance to salinity (Islam et al, 2016). In that study, GST activity was induced substantially with or without Spd in salinity stressed onion seedlings.…”
Section: Introductionmentioning
confidence: 60%
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“…Previously, enhanced activities of glyoxalases and GSTs in onion (Allium cepa L.) by exogenous Spd under salinity were reported, where the activities of the enzymes were upregulated with lower MG content (Islam et al, 2016). Therefore, exogenous Spd might have important role in reducing of ROS and regulating of related physiological activities under salinity.…”
Section: Rohman Et Al 3305mentioning
confidence: 99%