Nitric oxide alleviates wheat yield reduction by protecting photosynthetic system from oxidation of

作者：LiCH,SongYJ,GuoLY,GuX,MuminovMA,WangTZ*影响因子:5.099刊物名称:EnvironmentalPollution出版年份:2018卷:236期:页码:296-303文章摘要:

Acceleratedindustrializationhasbeenincreasingreleasesofchemicalprecursorsofozone.Ozoneconcentrationhasrisennowadays,andit'spredictedthatthistrendwillcontinueinthenextfewdecades.Theyieldofmanyozone-sensitivecropssuffersseriouslyfromozonepollution,andthereareabundantreportsexploringthedamagemechanismsofozonetothesecrops,suchaswinterwheat.However,littleisknownonhowtoalleviatethesenegativeimpactstoincreasegrainproductionunderelevatedozone.Nitricoxide,asabioactivegaseous,mediatesavarietyofphysiologicalprocessesandplaysacentralroleinresponsetobioticandabioticstresses.Inthepresentstudy,theaccumulationofendogenousnitricoxideinwheatleaveswasfoundtoincreaseinresponsetoozone.Tostudythefunctionsofnitricoxide,itsprecursorsodiumnitroprussidewasspayedtowheatleavesunderozonepollution.Wheatleavesspayedwithsodiumnitroprussideaccumulatedlesshydrogenperoxide,malondialdehydeandelectrolyteleakageunderozonepollution,whichcanbeaccountedforbythehigheractivitiesofsuperoxidedismutaseandperoxidasethaninleavestreatedwithoutsodiumnitroprusside.Consequently,netphotosyntheticrateofwheattreatedusingsodiumnitroprussidewasmuchhigher,andyieldreductionwasalleviatedunderozonefumigation.Thesefindingsareimportantforourunderstandingofthepotentialrolesofnitricoxideinresponsesofcropsingeneralandwheatinparticulartoozonepollution,andprovideaviablemethodtomitigatethedetrimentaleffectsoncropproductioninducedbyozonepollution,whichisvaluableforkeepingfoodsecurityworldwide.

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