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93 个结果
  • 简介:ThispaperexamedtheCupressaceaetaxainChina.Itisidentifledthat30speciesand16varietiesin7generainthefamilyareindigenous,andestimatedthatabout25speciesand4varietieshavebeenintroducedintothiscountrysincethebeginningofthiscentury.Itisurgentthatmorefurthurstudiesneedtobecarriedoutinthecountryonthetaxonomyespeciallyofjunipersandcypresses,onthere-classificationofexistingcultivars,andonthedevelopmentofnewcultivarsforfutureneeds.

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  • 简介:Manyanimalseatplants,butmanyplantsuseanimalsasfood.Someplantswhichliveinpoorconditionsarenotable,however,tomakeenoughfoodforthemselves.Theyobtainextrafoodbycakchinginsects.Pitcherplantscatchinsectsintheirspecialleaves.Onceaninsectistrappedinsidethepitcher,

  • 标签: TRAPPED themselves enough CATCH INSECT TRAPPING
  • 简介:Thispaperreviewsanddiscussesthetechnicaltermsanddefinitionofmangroveandmangal,aswellasmangroveplant.Thewordmangrovehasbeenusedtorefereithertotheconstituentplantoftropicalandsubtropicalintertidalcommunityortothecommunityitself,butthisusagemakesmoreconfusion.Beingleavedmangroveinthemorelimitedsensefortheconstituentplantspecies,mangalwasproposedbyMacNae(1968)asatermformangrovecommunity,whichhasbeenuniversallyappliedtomostpreviousstudiesandshouldbeadoptednow.Mangroveshouldbethereforedefinedasatropicalandsubtropicaltreerestrictedtointertidalzones,whichpossessessomemorphologicalspecializionandphysiologicalmechanismadaptedtoitshabitat,andmangalasatropicalandsubtropicalforestcommunityrestrictedtomarineintertidalzonesandperiodicallyinundeatedbythetides.Anewterm″consortiveplant″isproposedhereforherb,liana,epiphyteorparasite,whichisrestrictedinthestrictmangrovehabitat.

  • 标签: 红树林 热带 亚热带 形态学
  • 简介:防卫priming是增加了防卫正式就职的愿意被定义。文学的成长身体显示那种(或植物的未经触动的部分)被告知以防逼近的环境压力,关於生命、不能生活,并且在下列刺激之上,更快速并且强烈导致防卫。例如,当与第二等的昆虫喂质问了时,以前在草食动物下面从附近的植物暴露于草食动物可诱导的植物volatiles(HIPV)的一些植物攻击更快的表演或更强壮的防卫激活和提高的昆虫抵抗。关于antiherbivore防卫的priming的研究直到最近被限制了到调停HIPV的机制,但是重要进展在过去的三年里被做,包括non-HIPV-mediated防卫priming,epigenetic修正作为priming,和其它的分子的机制。在plantinsect相互作用在关于防卫priming的研究考虑进展是及时的。

  • 标签: 植物挥发物 防御反应 虫害诱导 分子机制 环境压力 遗传修饰
  • 简介:我们的生活离不开丰富多彩的植物,语言也是如此。英语中就有许多植物在其中扮演"主角"的习语,十分有趣。今天,就让我们一起来领略一下英语习语中植物的"靓丽风采"吧;1.Thepictureisniceandwonderful.Don’tpaintthelilybyputtingagoldframe.

  • 标签: 英语习语 植物 生活 语言 主角 营养丰富
  • 简介:Selenium(Se)isanessentialtraceelement,whichhumansandanimalstakedirectlyorindirectlyfromplants.Thispaperreviewedtherecentresearchprogressonspeciationofseleniumcompoundsinplants,includingthekindsofseleniumcompoundsandtheirmetabolicpathways,andthetechnologyforsampletreatment,separation,anddetermination.Organicseleniumcompoundsarethemajorpartsoftheseleniumspeciationinplants.Thetechnologyofultrasonic-microwavesynergisticextractioncombinedwithenzymatichydrolysisisusefulinsamplepreparation.HPLC-ICP-MSiswidelyusedindeterminingseleniumspeciation.Itisimportanttodevelopmorestandardseleniumcompoundsandpaymoreattentiontoselenoproteininplants.ESMS,ESMS-MSandMALDI-TOFcanbeappliedtoidentifyingtheunknownseleniumcompounds.TheapplicationofIDAindeterminingboththemetabolicpathwaysandthestructureoflargeseleniummoleculeswillbeamajoraspectforthefutureresearch.

  • 标签: BOTANY SELENIUM SPECIATION ANALYSIS PLANTS REVIEW
  • 简介:冬季食物宪法和国内绵羊的喜爱的水平在Hulunbeir草地与排汇物的microhistological分析技术被学习。一些问题被调查例如本地牧草资源的优秀状态,牧场的改进,牧草的合理使用,等等。结果证明在冬季的国内绵羊的主食食物是Gramineae,它完成了73.3%全部的foraging种类。Fabaceae是第二,11.6%。合成占据了第三个位置,7.4%。另外的种类的比例是很小的。

  • 标签: Hulunbeir GRASSLAND DOMESTIC SHEEP FORAGING PLANTS
  • 简介:Despitethefactthatironisoneofthemostabundantelementsoftheearth'scrust,irondeficienciesareseriousproblemsbothinhumannutrition[1]andinagriculture[2].Sixtoeightpercentoftheworld'spopulationispotentiallyaffectedbyirondeficiencyinducedanemia,aleadingcauseofmaternaldeathinAfricanandAsiancountrieswherepeoplerelymostlyonplantsfortheirdailyintakeofiron.Ironcanalsobealimitingfactorinthegrowthofeconomicallyimportantcropplantsbecauseofinadequatesoilchemistry,andsuchdeficienciescannoteasilybecorrectedbyamendingthesoil.Improvingtheplant'sabilitytoabsorbironinadverseconditionsandtoincreasetheiroverallcontentcouldoffersolutionstothesedramaticproblems.Thereforeunderstandingthemolecularmechanismsregulatingironuptakeandhomeostasisinplantshaspotentiallyimportantpracticalapplicationsbothinagricultureandhumanhealth[3].

  • 标签: 植物 铁稳态 铁转运 转录 易位 基因表达
  • 简介:Sulfurtransformationin3soilsmaintainedinaclosedincubationsystemanditsavailabilitytoplantswereinvestigatedusingcarrier-free^35S-SO4^2-and^35S-labeledryegrassstraw.Forcarrier-freeNa2^35SO4treatment,78%,70%and64%of^35SappliedwerefoundinCa(H2PO4)2-extractaleSfraction,4%,5%and7%inslowlysolubleinorganicS,11%,15%and18%inC-O-S,5%,7%,and6%inC-bondedS,and5%,7%and6%inunidentifiedorganicS120daysafterincubationinblacksoil,cinnamonsoilandchestnutsoil,respectively.Mostof35Suptakebyplantscamefromextractable35SO4^2-,andlittlefromC-O-^35SandC-bonded^35S,Inthetreatmentwith35S-labeledstraw,51%,46%and36%of35SincorporatedwerefoundinCa(H2PO4)2-extractableSfraction,7%,6%and7%inslowlysolubleinorganicS,13%,15%and18%inC-O-S,8%,8%and6%inC-bondedS,and18%,25%and35%inunidentifiedorganicSattheendofincubationinabove-mentonedthreesoils,respectively.HigheravailabilityofC-O-35S,C-bonded35Sandunidentifiedorganic35Sfrom35S-labeledstrawwasobservedin35S-labeledstrawtreatmentcomparedtocarrier-freeNa2^35SO4treatment.

  • 标签: 北方 高地 土壤缺硫 ^35S 有效性 硫转化
  • 简介:ThebulbsofFritillariaspp.(Liliaceae)areusedinChinesemedicineasantipyretic,anti-tussive,expectorant,etc.Inordertosearchforthebioactiveconstituentsfromthisgenus,thebulbsoffourspeciesofmedicinalFritillariaplantshavebeeninvestigated.ThirteencompoundswereisolatedfromFritillariathunbergiiMiq.,threeofthemwerenewcompounds.FourteencompoundsfromFritillariathunbergiivar.chekiangensisHsiaoetK.C.HsiacollectedinDongyangofZhejiangProvince,fourofthemarenewcompoundsandanotheronewasfirstiso-

  • 标签: 贝母 浙贝母 化学成分
  • 简介:SeventeenspeciesandtwovarietiesofEuphorbia,includingonenewvariety,werefoundinGansuProvince.Theybelongtothreesections,viz.Sect.Anisophyllum:EuphorbiabumifusaWilld.;Sect.Petaloma:E.marginataPursh;Sect.Tithymalus:E.micractinaBoiss.,E.wangiiOudejans,E.heishuiensisW.T.Wang,E.hylonomaHand.-Mzt.,E.ekinensisRu

  • 标签: 大戟 药用价值 分布 产地
  • 简介:Accordingtothenationalpolicyonenhancingenvironmentalprotection,thefivemajorpowergenerationcompaniesarerequiredtocarryoutfluegasdesulphurization(FGD)franchisingpilotprojectinthermalpowerplants.Thispaperintroducesthedevelopmentofthispilotproject,includingthefoundation,purpose,objects,demandsandprocedures.Italsodiscussessomemainproblemsencounteredduringimplementation,involvingtheunderstanding,legislation,financing,taxation,pricingandmanagementoffranchise.At...

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