简介:Defenceproteinsareakindofchemicaldefencecompounds.Theyplayakeyroleinplantrestrainingbioticandabioticharm.Toilluminateactivitiesofsomedefenseproteinsassociatedwithageorplantfamilyoflarch,thelarchneedleswerecollectedfromtwodifferentfamiliesofKoreanlarch,Larixolgensisandahybridlarch,L.kaempferi×L.gmelinii,respectively,andthentheactivitiesofdefenceproteinsinthoseweretestedusingaUVspectrophotometry.Theresultsshowedthattheactivitiesofprotectiveenzymesatthe16-/17-and19-year-agegroupswerehigherthanthoseattheotheragegroupsinthebothlarchspecies.Whiletheactivitiesofpolyphenoloxidase(PPO)atthe16-/17-year-agegroupandphenylalanineammonia-lyase(PAL)andproteaseinhibitorsatthe19-year-agegroupwerethehighestamongallagegroups.Then,comparedwithL.olgensis,thehybridlarchhadsignificanteffectsontheactivitiesofprotectiveenzymes.TheeffectsofplantfamilyontheactivitiesofPALandchymotrypsininhibitorweresignificantlydifferent,andthenthoseontheactivitiesofPPOwerenotsignificantlydifferent.TheeffectsofthetwofamiliesinL.olgensisontheactivitiesoftrypsininhibitor(TI)weresignificantlydifferent,whilethoseinthehybridlarchontheactivitiesofTIwerecontrary.Toconclusionsshowedthatthedifferentageandplantfamilysignificantlyaffectedtheactivitiesofdefenceproteinsintheneedlesoftwolarchspecies,andthenenhancedthelarchresistancetopests.Thesecouldplayakeyfunctioninforestrytreegeneticimprovementandmanagementinfuture.
简介:MultiplicationofElaeagnusangustifoliaL.wasexaminedinvitrosuccessivelyfromasingleshootunderthespecifiedconditionofdifferentmedia,plantgrowthregulators,pHvalueandsucroseconcentration.ItwasshowedthatMMS1wasthemostsuitablemediumonshootmultiplicationamong5mediaconcerned;BAPwasthemosteffectiveoneamongallthecytokinininvolved,BAP,KN,TDZandZT;theexpluntofthetophalf-partfromashootproducedmorenewshootsthanthatofthefoothalf-partdid;morenewshoots(>2cm)wereproducedunder3%sucrosebetweentheconcentrationswithtophalf-partexplants;shootscouldgrowwellbetweenpH4.4andpH7.0,andthebiggestnumberofshootswasproducedinpH5.6,whileinpH5.8themaximumrootingrateappeared.Asaresult,thecombinationof0.5μMBAPand0.1μMIBAonMMS1mediuminducedthemaximumshootmultiplication.Thenumberofshootamplified3timesin1month,and3^12shoots(>2cm)mightbetheoreticallymultipliedannuallyfromasingleshoot.
简介:InordertomaintainhigheremergenceratewithdirectseedinginShandongrockymountain,effectsofdifferentcoveringwaysonemergencerateofSophorajaponicaL.directseedingwerestudied.Theresultsshowedthatbothmulchingfilmandgrasscovercouldeffectivelyincreasethemoisturecontentofthesoilatthedepthof0-30cm,contributingtosoilmoistureconservationandtheinhibitionofsoilevaporation,whichcreatedfavorablemoistureenvironmentforthegrowthofS.japonicaseeds.Bothth...
简介:Applyingtheeconomicprinciples,thisarticlecarriesouttheassessmentofeconomicperformancesbroughtbyforestryresearchachievementthroughresearchanddiscussionontheassessmentmethodofeconomicperformancesofprovenancepopularizationofPinusmassonianaL.Thearticlealsobringsintheoptionmethodtofullydisplaythevalueofforestresearchachievement.
简介:Theneedforreforestationincorkoak(QuercussuberL.)areasischallengedbydifficulties.Principalamongtheseisherbivoryofyoungplants,vegetativecompetition,andslowgrowthratesofcorkoakseedlings.WeevaluatedtheearlydevelopmentofcorkoakseedlingstreatedusingtreesheltersandmulchinginnorthwesternTunisia.Wetestedthreetreesheltertreatments(non-vented,vented,andcontrol)toshieldseedlingsfromanimaldamageandfivemulchtypestocontrolcompetingvegetation(ItalianStonePine,Lentisk,combinationofItalianStonePineandLentisk(organicmulches),gravel(inorganicmulch)andnomulch).Attheendofthetwo-yearexperiment,shelteredseedlingswere89-99%tallerthanunshelteredseedlingsandhadhighernumbersandlengthsofshootgrowthflushes.Incontrast,bothstemdiametergrowthanddryweightbiomass(fromsamplesextractedaftertwoyears)weresignificantlyreducedinsidetreeshelters.Root-to-shootratiowasnotsignificantlydifferentinshelteredvs.unshelteredseedlings,suggestingthattreesheltersdonotadverselyaffectthisparameter.Mulchingalonedidnotfavourgrowth,butcouldbebeneficialwhencombinedwithtreeshelters.Thecombinationofventedtreesheltersandgravelmulchwasthemosteffectivetreatmentforpromotingdiameter,heightandstemvolumegrowth.
简介:Blacklocust(RobiniapseudoacaciaL.)wasthefirstNorth-AmericantreespeciesimportedtoEuropeatthebeginningoftheseventeenthcentury.Itiscommonlyplantedworldwidebecauseofitsadaptabilitytoenvironmentalstresses,itsvaluablewood,easypropagation,frequentandabundantseedproduction,excellentcoppicing,highseedlingsurvival,andrelativelyhighwoodyield.InEurope,RomaniaandHungaryhavethemosthighly-developedblacklocustgrowingtechniquesandexperiences.Asaresultofincreasinginterestinblacklocustinmanycountries,thisreviewaimstoprovideacomprehensiveoverviewofstate-of-the-artsiterequirements,propagation,improvementandmanagement(includinggrowthandyieldaswellasuseinenergyplantations).
简介:ThedifferentiationprocessincludingsomaticembryogenesisindifferentGinkgoexplantsinvitroculturewerestudiedbycytologicalobservation.Theresultsareasfollows:1)twocompletecotyledonsandaembryobudwereobservedinmatureembryosandseveralsecretoryacavitivesappearedinmaturationregionofembryobuds,hypocotyls,cotyledonsandradiclesafterculturing20days;twoincompletecotyledonsandaembryobudprimordiawerefoundinlargecotyledonembryos.Theproembryooftwocells,fourcells,multi-cellular,andglobularembroyweredevelopedfromthecallusofthesmallcotyledonembryos.2)Thedifferentiationofcotyledonexplantsstartedfromepidermalcells,andgraduallyformedmeristematiccellmassinthecorticalcells,andeventuallyadventitiousbudswereobserved.3)TheadventitiousrootsofGinkgooriginatedinthecellsatthecrossofvascularcambiumandvascularrays.4)Thetypeofrootingbelongstoinductiontypebyrootprimordium.Theformedadventitiousrootswereobservedafter20days.
简介:云南是世界上木本竹子资源多样性最富集的地区之一。文章从竹类资源分布、竹种多样性及竹林类型3个方面对云南省竹类植物分布与资源区划进行了研究。根据云南省自然地理环境的巨大差异性和复杂多样化的生境条件,将云南竹类资源划分为滇中暖性中小型混合竹类区,滇东、滇东南热性大型丛生竹区,滇东北暖性中小型散生竹类区,滇南热性大型丛生竹类区,滇西、滇西南热性大型丛生竹类区,滇西、滇西北寒温性小型混生竹类区等6个区;分别论述了各分区地理位置、竹类植物区系特征等。此外,文章初步总结了云南省竹亚科植物资源,截至2017年底共记载竹种41属389种。依据竹类植物分布区气候特点,将云南省竹林分为热性竹林、暖性竹林、寒温性竹林3个植被亚型以及41个竹林类型。
简介:我们比较了在处于Karnataka的状态种区域的三棵宽广柚木从三个种子生产区域(矿泉)和柚木(TectonagrandisL.f)的三个相应未耕过的看台(UIS)获得的子孙的词法、基因的属性,印度。一般来说,播种象种子重量,种子尺寸和种子空虚那样的词法参数在与UIS相比的矿泉是显著地优异的。种子萌芽百分比在从矿泉的种子也是更高的。在二每月的间隔测量六个月的幼苗性能被观察在在比较的三个区域中的二个的矿泉优异。尽管矿泉的子孙的基因差异根本比UIS低区域,价值中等高。当差异索引否定地每种子与水果重量,水果直径和核重量被相关时,萌芽百分比断然每种子与水果重量和核重量被相关。矿泉没有对未来种植园的基因差异的严重威胁作为中等改进的种的材料的来源证明重要。
简介:当今,科学技术发展迅猛,新理论、新技术、新成果、新工具、新手段不断涌现。而科技期刊则是使它们及时公诸于世的重要园地。广大科技人员正是通过科技期刊获得各学科的最新发展动态,从而促进科研工作和生产实践。科技期刊是最重要的情报源。当代声像技术虽已相当发达,但据估计,科技期刊仍占有总情报源的60%以上。由此可见,办好科技期刊对活跃学术研究,推动科学技术繁荣和各项事业发展均具有十分重要的意义。就我国林业调查规划设计系统来看,目前大约办有二十几家刊物。这些刊物,有的叫“林业调查规划”,有的称“林业勘察设计”或“森林经理”。但从内容看,大多是