简介：Itisimportanttounderstandseasonalheavymetalaccumulationindifferentpartsofplantsinordertodevelopthebestphytoremediationpracticesforcontaminatedsoils.Forthispurposeweexposed,1yearoldA.victoriaeseedlingstoZnSO4in4differentconcentrations:0,50,250and500mgZnL-1for45daysovertwogrowingseasons.Subsequently,bioaccumulationofZnindifferentplanttissues（roots,shootsandleafs）wasassessedbyAtomicAbsorptionSpectroscopy（AAS）fortwoperiods.Inaddition,variousgrowthattributes（drybiomass,shootandrootlengths,plantappearance）andfunctionaltraits（leafarea,chlorophylla,bandtotal）weremeasured.TheaccumulationofZnwasinfluencedbytheZnconcentrationinthegrowthmediumandthenumberofgrowingseasons.TheamountsofZnconcentratedintheroottissuesmightindicateA.victoriaeasagoodoptionforphytostabilizationofsoilscontaminatedbyZn.WerecommendthatifA.victoriaeisusedforphytoextractionpurposes,thenitshouldbeharvestedattheendofthefirstgrowingseason（fall）becauseatthistimetheconcentrationsofZnintheabove-groundpartswillbemaximal.

简介：Exogenousapplicationofspermidine（Spd）hasbeenreportedtomodulatephysiologicalprocessesandalleviatesalt-induceddamagetogrowthandproductivityofseveralplantsincludingrice.Employingaproteomicapproach,weaimedatidentifyingriceleafandgrainproteinsdifferentiallyexpressingundersaltstress,andinresponsetoSpdpriortoNaCltreatment.Atotalof9and20differentiallyexpressedproteinspotswereidentifiedintheleavesofsalt-tolerant（Pokkali）andsaltsensitive（KDML105）ricecultivars,respectively.Differentialproteinscommontobothcultivarsincludedaphotosyntheticlightreactionprotein（oxygen-evolvingcomplexprotein1）,enzymesofCalvincycleandglycolysis（fructose-bisphosphatealdolaseandtriose-phosphateisomerase）,malatedehydrogenase,superoxidedismutaseandahypotheticalprotein（OsI18213）.MostproteinswerepresentathigherintensitiesinPokkalileaves.Thephotosyntheticoxygen-evolvingenhancerprotein2wasdetectedonlyinPokkaliandwasup-regulatedbysalt-stressandfurtherenhancedbySpdtreatment.AllthreespotsidentifiedassuperoxidedismutaseinKDML105wereup-regulatedbyNaClbutdown-regulatedwhentreatedwithSpdpriortoNaCl,indicatingthatSpdacteddirectlyasantioxidants.Importantdifferentialstressproteinsdetectedinmaturegrainsofbothricecultivarswerelateembryogenesisabundantproteinswithprotectiverolesandanantioxidantprotein,1-Cys-peroxiredoxin.HighersalttoleranceofPokkalipartlyresultedfromhigherintensitiesandmoreresponsivenessoftheproteinsrelatingtophotosynthesislightreactions,energymetabolism,antioxidantenzymesintheleaves,andstressproteinswithprotectiverolesinthegrains.

简介：从铵孤立的RNA--并且对待硝酸盐的米饭叶子被用来屏蔽差别通过mRNA的表示基因微分显示。72个乐队的一个总数显得重要他们的差别和一些被反向的北、北的污点进一步证实。结果显示出那二基因，A-02(Oryzasativa干旱应力联系了mRNA)并且A-03(Zeamays为TFIIB相关的蛋白质的部分mRNA)在喂铵的米饭叶子是高度起来调整的。酶试金证明二抗氧化的酶，过氧化氢酶和peroxidase的活动，和一种non-enzymic抗氧化剂的内容，谷胱甘肽，比在喂硝酸盐的那些在喂铵的米饭叶子是显著地更高的，显示铵营养可能为米饭是有益的种在生长和开发期间改进压力抵抗。

简介：Superoxidedismutase(SOD)andascorbateperoxidase(APX)playcentralrolesinthepathwayforscavengingreactiveoxygenspeciesinplants,therebycontributingtothetoleranceagainstabioticstress.HerewereporttheresponsesofcytosolicSOD(cSOD;sodCc1andsodCc2)andcytosolicAPX(cAPX;OsAPX1andOsAPX2)genestooxidativeandabioticstressinrice.RNAblotanalysesrevealedthatmethylviologentreatmentcausedamoreprominentinductionofcAPXscomparedwithcSODs,andhydrogenperoxidet...

简介：Whitebackedplanthopper(WBPH)-resistanceinajaponica/indicadoubledhaploid(DH)ricepopulationestablishedfromacrossbetweenWBPH-resistantjaponicaChunjiang06andsusceptibleindicaTN1,wascomparativelyevaluatedthroughafieldexperimentbasedontheWBPHimmigrantdensityandstandardizedseedboxscreeningtest(SSST).AllthesusceptibleDHlinesinthefieldexperimentbehavedaccordinglyinSSST.However,35ofresistant66lines(53%)inthefield,werecategorizedtosusceptiblegroupsinSSST.Likewise,therewerenosignificantdifferencesinWBPHimmigrantdensitiesamong70DHlinesthatwerehighlyresistanttosusceptibleinSSST.TheresultsrevealedthatSSSTcouldnotevaluateproperlyWBPHresistanceintheDHlines.FourQTLsforWBPH-resistancephenotypedbytheimmigrantdensityweredetectedonchromosomes2,3,4,and11.Ofthem,theQTLonchromosome4wasthemosteffective(LOD21.8,variance78%).FiveQTLsassociatedwithseedlingmortalityweremappedonchromosomes2,3,4,5and6.InadditiontotheQTL(LOD10.5,variance68%)onchromosome4,therewasanothermajorQTL(LOD12.7,variance71%)locatedonchromosome5,whichwasSSST-specificbutmightbeirrespectiveoftheWBPHresistancetraits.