Effect of elevated CO2 and temperature on oxidative stress and antioxidant enzymes activity in coconut (Cocosnucifera L.) seedlings

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dc.contributor.authorJohn Sunoj, V.S.
dc.contributor.authorNaresh Kumar, S.
dc.contributor.authorMuralikrishna, K.S.
dc.date.accessioned2015-01-22T06:27:25Z
dc.date.available2015-01-22T06:27:25Z
dc.date.issued2014-11
dc.description.abstractIncreasing atmospheric CO2 concentration is one of the factors driving climate change. We have investigated the individual effect of elevated CO2 and temperature on oxidative stress and antioxidant enzymes activity in coconut (Cocosnucifera L.) seedlings. Three cultivars (WCT, LCT and COD) and two hybrids (WCT 9 COD and COD 9 WCT) were grown in six open top chambers (OTCs) and responses were analyzed after three years. In two OTCs the CO2 was set at 550 and 700 lmol mol-1 and control chamber had ambient level of 393 lmol mol1. In two separate OTCs, air temperature was elevated by 2 C above the ambient control chamber. Remaining two chambers served as chamber control. Elevated CO2 and temperature increased the activities of superoxide dismutase and catalase , whereas it reduced polyphenol oxidase activity. On the other hand, peroxidase (POX) activity was decreased in elevated temperature, while it increased under elevated CO2 conditions. The POX activity and membrane stability index (MSI) were positively correlated. By virtue of greater MSI and lower MDA content, WCT and hybrid COD 9 WCT were observed to be tolerant to oxidative stress among the five cultivars under elevated CO2 and temperature conditions. These cultivars may adapt better to changing climates.en_US
dc.identifier.citationInd J Plant Physiol., November 2014en_US
dc.identifier.urihttp://hdl.handle.net/123456789/6167
dc.language.isoenen_US
dc.subjectClimate changeen_US
dc.subjectCO2en_US
dc.subjectTemperatureen_US
dc.subjectMembrane stability indexen_US
dc.subjectAntioxidant enzymes activityen_US
dc.subjectCocos nucifera Len_US
dc.titleEffect of elevated CO2 and temperature on oxidative stress and antioxidant enzymes activity in coconut (Cocosnucifera L.) seedlingsen_US
dc.typeArticleen_US

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