Analysis of detoxification and phenolic metabolism mediated through nitric oxide and hydrogen peroxide under ABA and water stress in wheat

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dc.contributor.advisorVikramjit Kaur
dc.contributor.authorRattanpreet Kaur
dc.date.accessioned2016-08-22T16:15:47Z
dc.date.available2016-08-22T16:15:47Z
dc.date.issued2016
dc.description.abstractTwo wheat cultivars PBW644 (drought tolerant) and PBW343 (drought sensitive) were compared under PEG/ABA for ROS/nitric oxide (NO)-regulation of antioxidant metabolism. Endogenous ROS/NO under ABA/PEG increased germination and growth, such effect was higher in PBW644. In PBW343, reduced growth under PEG was improved by exogenous ROS/NO. ABA/PEGupregulation of GPX and GST involved ROS/NO signalling which was similar in both cultivars under ABA but higher in PBW644 under PEG. PEG increase of acid protease was higher in PBW343 while of alkaline protease was higher in PBW644. ABA/PEG-upregulation of proteases involved ROS/NO-signalling. Redox state of glutathione under PEG/ABA involved ROS/NO signalling which was induced in PBW343 while in PBW644, it was induced when exogenous ROS/NO applied under ABA (high stress level). Increase of ROS/NO under ABA/PEG was signal, it was higher in PBW644. Such signals were increased by ROS/NO-signalling. Moreover, ROS/NO-signalling also decreased ROS under ABA/PEG. Oxidative toxicity was lesser in PBW644 under PEG, was reduced by ROS/NO signals in both cultivars. However, exogenous ROS/NO under ABA could also increase oxidative toxicity. Under PEG, PBW644 showed higher upregulation of cell wall peroxidase (CW-POX) while lesser soluble peroxidase (S-POX). However, under ABA, it showed higher levels of both CW-POX and S-POX. ROS/NO signals under PEG/ABA contributed to increase both types of POX in both cultivars. PEG increase of phenolics and ABA/PEG increase of lignin was higher in PBW644. Under PEG/ABA, ROS/NOsignalling increased phenolics and decreased lignin in PBW343 while in PBW644, it increased both in shoot while decreased both in root. PEG increased flavonoids. Under PEG/ABA, ROS/NO signals may increase flavonoids.en_US
dc.identifier.urihttp://krishikosh.egranth.ac.in/handle/1/73337
dc.language.isoenen_US
dc.publisherPunjab Agricultural University, Ludhianaen_US
dc.subBiotechnology
dc.subjectWheat, antioxidant, nitric oxide, reactive oxygen species, abscisic acid, water stressen_US
dc.these.typeM.Sc
dc.titleAnalysis of detoxification and phenolic metabolism mediated through nitric oxide and hydrogen peroxide under ABA and water stress in wheaten_US
dc.typeThesisen_US
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