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Promising physiological traits associated with nitrogen use efficiency in rice under reduced N application

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Title Promising physiological traits associated with nitrogen use efficiency in rice under reduced N application
 
Creator Bathula Srikanth, Desiraju Subrahmanyam, Durbha Sanjeeva Rao, Sadu Narender Reddy, Kallakuri Supriya, Puskur Raghuveer Rao, Kuchi Surekha, Raman Meenakshi Sundaram, Chirravuri Naga Neeraja
 
Subject maximumquantumyieldofPSII,actualquantumyieldofPSII,electrontransportrate, nitrogenuseefficiency,nitrogen,rice
 
Description Not Available
Highergrainyieldinhigh-yieldingricevarietiesismostlydrivenbynitrogen(N) fertilizerappliedinabundantamountsleadingtoincreasedproductioncostand environmentalpollution.Thishasfueledthestudiesonnitrogenuseefficiency (NUE)todecreasetheNfertilizerapplicationinricetothepossibleextent.NUEis a complexphysiological trait controlledbymultiplegenes, but yet tobe completelydeciphered inrice.Withanobjectiveof identifyingthepromising physiological traits associatedwithNUE in rice, theperformanceof 14 rice genotypeswasassessedatN0,N50,N100,andN150forfour(twowetandtwo dry) seasons using agro-morphological, grain yield, flag leaf traits, photosyntheticpigmentcontent,flagleafgasexchangetraits,andchlorophyll fluorescence traits. Furthermore, thedatawereused toderivevariousNUE indicestoidentifythemostappropriateindicesusefultoscreenricegenotypesat N50.Results indicatethatwiththeincreaseinNapplication,cumulativegrain yieldincreasedsignificantlyuptoN100(5.02tha−1);however, theincrement in grainyieldwasmarginalatN150(5.09tha−1).Themeanreductionofgrainyield wasonly26.66%atN50rangingfrom15.0%to34.2%.Thesignificantfindingof thestudyistheidentificationofflagleafchlorophyllfluorescencetraits(Fv/Fm, FPSII,ETR,andqP)andCiassociatedwithgrainyieldunderN50,whichcanbe usedtoscreenNuseefficientgenotypes inriceunder reducedNapplication. Out of nineNUE indices assessed, NUpE, NUtE, andNUEyieldwereable to delineatethehigh-yieldinggenotypesatN50andwereuseful toscreenrice underreducedNconditions.Birupaemergedasoneofthehighyieldersunder N50,eventhoughit isamoderateyielderatN100andinfersthepossibilityof cultivatingsomeofthereleasedricevarietiesunderreducedNinputs.Thestudy indicatesthepossibilityoftheexistenceofpromisinggeneticvariabilityforgrain yieldunderreducedN,thepotentialofflagleafchlorophyllfluorescence,andgas exchangetraitsasphysiologicalmarkersandbest suitableNUE indices tobe deployedinricebreedingprograms.
 
Date 2024-04-20T12:33:19Z
2024-04-20T12:33:19Z
2023-11-20
 
Type Article
 
Identifier SrikanthB,SubrahmanyamD, SanjeevaRaoD,NarenderReddyS, SupriyaK,RaghuveerRaoP,SurekhaK, SundaramRMandNeerajaCN(2023) Promisingphysiological traitsassociated withnitrogenuseefficiencyinrice underreducedNapplication. Front.PlantSci.14:1268739. doi:10.3389/fpls.2023.1268739
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http://krishi.icar.gov.in/jspui/handle/123456789/82250
 
Language English
 
Publisher Frontiers