简介：据新科学家杂志报道,英国JohnInnes中心的研究人员从基因角度阐述了寒冷是如何控制拟南芥属植物开花的。拟南芥属植物因生长周期短,被各国实验室广泛用来作为实验植物,被称为"植物界中的小白鼠"。研究人员发现,法国第戎气候温和,生长在此的拟南芥比生长在气候寒冷的瑞典斯得哥尔摩的拟南芥开花要提早很多。

简介：据新一期英国《新科学家》杂志介绍,科学家曾发现,在植物体内有三组基因与花朵形成的过程有关。如果使这三组基因不能发挥作用,花朵的花瓣、雄蕊、心皮等部分都会变成叶子一样的萼片。不过,激活叶子里的这三组基因,尚不足以使叶子变成花瓣。墨西哥国家自治大学和美国加州大学圣迭戈分校的科学家发现,除原来的三组基因外,植

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简介：7月2日，由UPOV（国际植物新品种保护联盟）主办，国家林业局、云南省花卉产业联合会承办的UPOV第40届观赏植物和林木技术工作组会议在昆明召开。

简介：记者从江苏省十届人大常委会第十九次会议上获悉，江苏省13个省辖市中，除南京、无锡、徐州、常州和南通5市正按照《江苏生态省建设规划纲要》的要求组织编制生态城市建设规划外，其余各市均已完成了编制工作，并开始实施。

简介：通过对欧洲垂枝桦的引种和基因库的建立,加强我省园林绿化树种品种多样性,完善城乡园林生态建设,提高经济效益。

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：俄罗斯《林业报》2004年11月27日报道：国际运动——全球禁止转基因树木运动很重视中国的转基因杨。中国是世界第一个开始商业化使用转基因树木的国家。根据官方资料，中国南方人工林有50余万hm^2耐抗虫害的基因变异杨。

简介：对转Bt-C肽+蜘蛛杀虫肽基因小黑杨的抗虫性做了系统的测定,取食转基因杨树舞毒蛾幼虫与对照相比,其发育速率为54.6%～72.8%、校正死亡率为72.8%～96.9%、体重降低率为11.2%～62.4%.证明抗虫基因已成功转入杨树中,并且表现出显著的抗虫性.

简介：分别以雷竹嫩叶的基因组DNA和幼穗的cDNA为模板，采用PCR方法扩增出长为490bp及262bp的片段。序列分析结果表明，该基因序列包含1个长为228bp的内含子。其编码区共编Ns86个氨基酸。其氨基酸序列与水稻中OsFCA、小麦中TaFCA的一致性分别为79．8％与69．9％，表明雷伢中可能存在调控开花的自主调控途径。

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简介：本标准中4．2．2、10．1、10．4为强制性条文，其余为推荐性条文。本标准由汕头市质量技术监督局、汕头市林业局提出。本标准起草单位：汕头市林业科学研究所、汕头市潮阳区林业局、潮阳区西胪镇。本标准主要起草人：辛如如、詹潮安、刘汉廷、黄健宏、纪丹虹。

简介：毛竹基因组测序研究项目在国际竹藤中心举行了成果新闻发布会。据介绍，毛竹是禾本科竹亚科中最具生态和经济价值的物种，具有非常独特的生物学特性和科学价值。我国现有毛竹林面积386万hm2，占全国森林面积的2％。

简介：国家863项目——天津盐生植物园建设目前已基本完成，5hm^2植物园内植被覆盖率由原来的10％提高到90％以上，成为我国北方盐生植物的种质基因库和滨海生态建设的大型苗圃。

简介：五唇兰组织内含有大量的酚类、多糖以及此生代谢产物,DNA提取较为困难。为获得高质量的五唇兰基因组DNA,文中采用传统十六烷基三甲基溴化铵(CTAB)法、常规十二烷基硫酸钠(SDS)法和改进的CTAB法对五唇兰基因组DNA的提取进行比较。结果表明:改进的CTAB法比传统CTAB法和常规SDS法都好,可以得到质量较好的DNA,电泳条带清晰,通过紫外分光光度计检测,A260/A280为2.0以上。

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：Background:Theglobalsearchfornewwaystosequestercarbonhasalreadyreachedagriculturallands.Suchlandconstitutesamajorpotentialcarbonsink.Theproductionofhighvaluetimberwithinagroforestrysystemscanfacilitateanin-situcarbonstoragefunction.Thisisfollowedbyapotentiallongtermex-situcarbonsinkwithinlonglastingproductssuchasveneerandfurniture.Forthispurposewildcherry(PrunusaviumL.)isaninterestingoptionformiddleEurope,yieldinghighpricesonthetimbermarket.Methods:Atotalnumberof39wildcherryweresampledin2012and2013toassesstheleaflessabovegroundbiomass.Thecompletetreesincludingstemandbrancheswereseparatedinto1cmdiameterclasses.Woodandbarkfromsub-sampleswereanalysedseparatelyandnutrientcontentwasderived.Modelsforbiomassestimationwereconstructedforalltreecompartments.Results:Thesmallestdiameterclassespossessthehighestproportionofbarkduetosmallercrosssectionalarea.Treeboleswithagreateramountofstemwoodabove10cmindiameterwillhaveamoreconstantbarkproportion.Totalbranchbarkproportionalsoremainsrelativelyconstantaboved_(1.3m)measurementsof8cm.Abalanceisevidentbetweentheproductionofnewbrancheswithalowdiameterandhighbarkproportionoffsetbythethickeningandarelativereductioninbarkproportioninlargerbranches.Theresultsshowthatasingletreewithanageof17and18yearscanstoreupto85kgofcarbonwithintheabovegroundbiomassportion,anamountthatwillincreaseasthetreematures.Branchesdisplaygreaternutrientcontentthanstemsectionspervolumeunitwhichcanbeattributedtoagreaterbarkproportion.Conclusions:Usingthederivedmodelsthecarbonandthenutrientcontentofabove-groundwoodybiomassofwholetreescanbecalculated.Suggestedvaluesforcarbonwithothermajorandminornutrientsheldwithinrelativelyimmaturetreesstronglysupportstheideaoftheinclusionofwildcherrywithinagroforestrysystemsasan

简介：Background:Themainobjectiveofthisstudywastoexaminetheclimaticsensitivityoftheradialgrowthresponseof13easternwhitepine(PinusstrobusL.)provenancesplantedatseventestsitesthroughoutthenorthernpartofthespecies’nativedistributionineasternNorthAmerica.Methods:Thetestsites(i.e.,Wabeno,Wisconsin,USA;Manistique,Michigan,USA;PineRiver,Michigan,USA;Newaygo,Michigan,USA;TurkeyPoint,Ontario,Canada;Ganaraska,Ontario,Canada;andOrono,Maine,USA)examinedinthisstudywerepartofarange-widewhitepineprovenancetrialestablishedintheearly1960sintheeasternUnitedStatesandCanada.Principalcomponentsanalysis(PCA)wasusedtoexaminethemainmodesofvariation[first(PC1)andsecond(PC2)principalcomponentaxes]inthestandardizedradialgrowthindicesoftheprovenancesateachtestsite.TheyearscoresforPC1andPC2wereexaminedinrelationtoanarrayoftestsiteclimatevariablesusingmultipleregressionanalysistoexaminethecommonalityofgrowthresponseacrossallprovenancestotheclimateofeachtestsite.ProvenanceloadingsonPC1andPC2werecorrelatedwithgeographicparameters(i.e.,latitude,longitude,elevation)andasuiteofbiophysicalparametersassociatedwithprovenanceoriginlocation.Results:TheamountofvariationinradialgrowthexplainedbyPC1andPC2rangedfrom43.4%to89.6%.Dendroclimaticmodelsrevealedthatwhitepineradialgrowthresponsestoclimatewerecomplexanddifferedamongsites.Thekeydendroclimaticrelationshipsobservedincludedsensitivitytohightemperatureinwinterandsummer,coldtemperatureinthespringandfal(i.e.,beginningandendofthegrowingseason),summermoisturestress,potentialsensitivitytostorminduceddamageinspringandfal,andbothpositiveandnegativeeffectsofhigherwintersnowfal.Separationoftheloadingsofprovenancesonprincipalcomponentaxeswasmainlyassociatedwithtemperature-relatedbioclimaticparametersofprovenanceoriginat5ofth

简介：Apotexperimentwasconductedtoinvestigatetheeffectsofnitrogencontent[N1(nofertilizer),N2(0.15g?kg–1),andN3(0.3g?kg–1)]onthegrowthandthehydrauliccharacteristicsofpeachseedlingsunderdifferentsoilmoistureconditions(W1,W2andW3,inwhichthesoilwatercontentwas45%to55%,60%to70%,and75%to80%ofthefieldwatercapacity,respectively)byusingaspecializedhighpressureflowmeterwitharootchamberandacoupling,whichwasconnectedtoplantorgans.Leafareaandleafhydraulicconductivity(KL)increasedsignificantlyintheseedlingsbecauseofincreasedsoilmoistureandNcontent.KLincreasedwithleafarea.AlinearcorrelationwasdocumentedbetweenKLandleafarea.KLwashigherinthemorningandbegantodeclinesharplyafter16:00,atwhichKLdeclinedafteraninitialincrease.SoilmoistureandNcontentenhancedshoot(Ks)androot(Kr)hydraulicconductivities,therebyimprovingthelowsoilmoistureconditiontoalargeextent.KsandKroftheseedlingswerereducedby32%and27%respectivelyinN1,andby14.7%and9.4%,respectivelyinN2,andbothinW1,comparedwiththecontroltreatment.N3hadnosignificanteffectonKsandKrundersimilarconditions.LinearnegativecorrelationswereobservedbetweenKrandtheexcisedrootdiameteraswellasbetweenKsandtheshootstemdiameter.Theshoot-to-rootratioincreasedwithincreaseinNcontent.Theshoot-to-rootratioinN3wasincreasedby14.37%,comparedwithN1inW1aswellasby12%and4.39%inW2andW3,respectively.KnowledgeoftheeffectsofsoilmoistureandNfertilizeronhydrauliccharacteristicsandgrowthisimportant.Ourresultsprovidebasicguidelinesfortheimplementationofwater-savingirrigationandfertilizationmanagementofnurserystock.

简介：据《日本工业新闻》报道,关西电力公司从绿藻中分离出环境适应力强的基因,并用它来培育环境适应力强的植物。绿藻是一种生存于海边的浮游生物,具有耐高浓度盐分、耐干旱和耐直射阳光等特性。关西电力公司从绿藻中分离出两种酶,它们具有把双氧水变为水的功能。该公司应用转基因技术把这两种酶分别植入烟草中去,目前已经