简介:InordertoexplorethefeasibilityofusingX-raytomeasuremoisturecontentinthedryingprocessandhaveafurtherstudyontheeffectofprecisionofmoisturecontentwhenscanningthroughdifferentgraindirections,X-rayscanningmethodandweightingmethodwereusedtomeasureaveragemoisturecontentofCunninghamialanceolataduringhotairdrying.Theresultsshowthatthemoisturecontentvaluesoftwomethodswereveryclosetooneanother,thedeterminationcoefficientsofbothwerehighlycorrelatedwithavalueover0.99,andtheabsolutedeviationwasbelow2%;whenscanningalongradialdirectionandlongitudinaldirection,theprecisionsofaveragemoisturecontentwerehigherthanthatofthetangentialdirection,butthedeviationcanbenegligibleintheactualmeasurement;inthepracticalapplication,theeffectofgraindirectiononprecisionofmoisturecontentmeasurementcouldnotbetakenintoaccountwhenusingX-raytomeasurethemoisturedistributionofwood.
简介:TheabsorptionandenrichmentofheavymetalelementsbyleavesofPopulus×euramericanacv.’Neva’wereanalyzedthroughcontentassessingofheavymetalelementsinsoilsofthreeforestlandsatFangshanDistrictinthesouthernsuburbofBeijing.TheseforestlandswithP.×euramericanacv.’Neva’plantationwerearoundwiththevarioussourcesofpollutionsuchascementmill,stonemill,sewageandgarbage.SomeofheavymetalelementssuchasCd,Pb,Cu,andZnwerefoundinthesoilsamplesandleavesofP.×euramericanacv.’Neva’grownonthethreeforestlandswhichwereinvestigated.TheresultsofinvestigationshowedthatthesoilsofthreeforestlandswerepollutedwithPb,Cd,CuandZninvaryingdegrees.ThecontentsofPb,CuandZninsoilsweresignificantlydifferentamongthethreeforestlands,whereastheaveragecontentofCd(0.0776mg·kg-1)waslessbutthatofPb,Cu,andZn(37.61,26.25and90.3mg·kg-1)weremorethantheaveragebackgroundvalueofBeijing.ThecontentsofPb,Cd,CuandZninleavesofP.×euramericanacv.’Neva’weredifferentamongthreeforestlands.Withthechangesofheavymetalcontentsinsoilsamples,therewasnoregularityonthechangesofdifferentheavymetalcontentsinleavesofP.×euramericanacv.’Neva’grownondifferentforestland.P.×euramericanacv.’Neva’canabsorbandaccumulatePb,Cd,CuandZninsoilbutshoweddifferentcapacitiesofabsorptionandaccumulationwiththeorderofCd>Zn>Cu>Pb.Especially,itsabsorptionandaccumulationcapacityforCdwasstrongwithmaximumenrichmentfactorhigherthan16andshowedhighaccumulationonlowbackground,whereasitsenrichmentcapacitiesforPbandCuwererelativelypoorerwithaverageenrichmentfactoroflessthan1.Atdifferentforestlands,thereexistedgreatdifferenceonabsorptioncapacityofP.×euramericanacv.’Neva’withthesameheavymetal.
简介:米饭镉(Cd)敏感变异的cadB-1用Agrobacteriumtumefaciens被获得调停的系统。在cadB-1和野类型(WT)的暴露以后米饭幼苗到为有增加外部Cd集中的cadB-1和WT的10d,在根积累到高水平的Cd,茎和叶子的Cd集中的一个范围,并且在cadB-1的幼苗生长的抑制比在WT更严肃。氢过氧化物累积在cadB-1的叶子和根是更高的。减少的谷胱甘肽(GSH)的比率/oxidized谷胱甘肽(GSSG),ascorbate(ASC)/dehydroascorbate(DHA)和减少的菸碱腺嘌dinucleotide磷酸盐(NADPH)/oxidized菸碱腺嘌dinucleotide磷酸盐(NADP+)在高Cd层次下面在叶子和根两个都比在WT在cadB-1是更低的。ascorbateperoxidase(APX)的活动,谷胱甘肽peroxidase(GR),dehydroascorbatereductase(DHAR)和monodehydroascorbatereductase(MDHAR)在Cd的高水平的处理下面在叶子和根两个都比在WT在cadB-1是也更低的。我们的结果建议在Cd应力下面,ASC-GSH周期更严重比在WT在cadB-1被禁止,显示变异的cadB-1不太能清除反应的氧种类并且对Cd敏感。
简介:Theproteinstructureofthecellulosesynthase-likeprotein(CSL)wassimilartocellulosesynthase(CesA),includingtheconservativesequenceD,D,D,QXXRW.Onefull-lengthcDNAofthecellulosesynthase-likeproteinD(CslD)genewasclonedbyreversetranscriptase(RT)-polymerasechainreaction(PCR)with5’,3’rapidamplificationofcDNAends(RACE)methodsusingdegenerateprimersdesignedfromthehomologoussequencesoftheCesAgenes.Amultiplecomparisonsequenceanalysiswasconductedconcurrentlywithbioinformaticmethodstoanalyzetheobtainedsequence.ResultsofthesequenceanalysisshowedthatthiscDNAwas4150bpinlengthandcontainedasingleopenreadingframeencodingaproteinof1132aminoacids.Themultiplecomparisonsequenceanalysisshowedthatthededucedaminoacidsequencesharedhighsimilarity(over71%)withtheClCslDgenesfromPopulustremuloides,Oryzasativa,andArabidopsisthaliana.Thisworkwillhelplayanimportantfoundationforfurthermolecularstudieswithcellulosesynthesisofplants.
简介:在东南亚洲的农民从移植直接弄湿或当它要求更少的劳动和时间,弄干播种正在采用大米庄稼建立方法并且比较地更少的精力与移植比。与灌溉状况相对照,在rainfed低地,直接播种是一个普通惯例。早泛滥控制杂草,但是减少在直接播种的米饭的幼苗建立。厌氧的萌芽是一个重要特点抵抗早泛滥引起的损坏。能在庄稼建立帮助并且在泛滥下面改进庄稼生长的管理选择可能移开与直接播种有关的限制。调查与二近的isogenic线Swarna和Swarna-Sub1被执行。而Swarna是易受影响的,Swarna-Sub1是容忍的浸没。种子priming用完了水和2%Jamun(Syzygiumcumini)叶摘录,和它在泛滥下面改进了幼苗建立。生长的加速由于种子预告的处理发生了,它更长结果幼苗和生物资源的更大的累积。种子priming极大地赶快在Swarna-Sub1的全部的淀粉酶和白酒脱氢酶的活动比在Swarna。当植物在泛滥下面被栽培时,Swarna-Sub1超过了Swarna。杂草生物资源在与非充满的条件相比泛滥下面显著地减少了。种子priming在在非充满、早的泛滥的条件下面两个都归因参数的产量和产量上有积极效果。
简介:影响在米饭变化在光合作用和抗氧化剂能力上浸没Swarna和Swarna-Sub1与或没有Sub1QTL在控制下面被评估,模仿完全浸没并且随后的重新通风。叶光合的率和有气孔的传导力在前进期间在两个变化减少了当与控制相比植物,而是重要品种的差别在1d以后被观察,浸没浸没。浸没也改变了PSII活动,在Fo的价值在减少思考了叶绿素的Fm和Fv/Fm和降级,更在里面Swarna比在Swarna-Sub1。在期间早浸没时期,superoxidedismutase(草皮)的活动,ascorbateperoxidase(APX),dehydroascorbatereductase(DHAR),对反应的氧种类的谷胱甘肽reductase(GR)在两个变化被增加。然而,与进步浸没时期(在7d以后),草皮,过氧化氢酶(猫),APX,guaiacolperoxidase(GPX),GR和DHAR的活动衰退了,更在里面Swarna比在Swarna-Sub1。在重新通风期间,Swarna-Sub1显示出上面的抗氧化剂酶然而并非在Swarna的重要增加。Swarna-Sub1改进光合的活动,显示出与Swarna在下面相比的更高光合的率浸没并且随后的重新通风因为叶绿素,更高有气孔的传导力,和与从氧化损坏的更好的抗氧化剂保护一起的有效PSII活动的更少的降级。