Study of Water Relations and Solutes Accumulation in Two Rice Genotypes under NaCI Stress during Seedling Stage.pdfVIP
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Study of Water Relations and Solutes Accumulation in Two Rice Genotypes under NaCI Stress during Seedling Stage.pdf
JournalofAgriculturalScienceandTechnologyB 1(2011)121-132
Earliertitle:JournalofAgriculturalScienceandTechnology,ISSN 1939—1250
… … 壤
StudyofW aterRelationsandSolutesAccumulationin
TwoRiceGenotypesunderNaCIStressduringSeedling
Stage
s.Gholizadeh,F.Moradi,M .R.Bihamta。andINemati
.
,.CollegeofAgriculture,IslamicAzadUniversity,Khorramshahrbranch,P.0Box333,Khorramshahr6316844519.Iran
2.PlantPhysiologyLibratory,AgriculturalBiotechnologyResearchInstituteoflran RUb.P.0 Box31535—1897,Karaj
3135933l511ran
3.DepartmentofPlantBreeding,AgricultureCollege,UniversiytofTehran,Karaj315877787J,lran
Received:March26.2010/Published:May20,2011
Abstract:Inordertostudyosmoticadjustmentandaccumulationofanionsandcationsinrice(OryzasativaL.)seedlingsunder
NaCIstress,agreenhouseexperimentwasconducted usingtworicecultivarsincludingIR651(tolerant)and IR29(sensitive).
Seedlingsweregrown inYoushidanutrientsolution.Salinitytreatmentswereimposed2ldaysaftersowingwith0and lO0mM
NaC1andseedlingswereharvested0,72.12Oand240houraftersalinization.Water( )andosmotic( )potentials.totalsoluble
sugarsandinorganicionsN【a,K ,cl一,ca andMg )concentrationsandosmoticadjustmentweredeterminedinsixth(youngest)
Ieaf.Salinitycausedasubstantialbiomassreductionjnriceseedlings. reductionin IR29wasoccurredmorethan IR651
. W ater
potentialdecreasedinboththecultivarsunderstressconditionsbutIR651wasabletomaintainhigher andkeptbettergrowthtill
theendoftheexperiment.OsmoticadjustmentwasobservedinIR651wasaboutl0timesmorethaninIR29K accumulation
decreasedinbothcultivarsunderstressconditionwhileNa accumulationincreasedinboththecultivarswithhigherincreasein1R29
seedlings.CIc‘oncentrationincreasedinyounge
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