华中农业大学微生物英文版课件

HuazhongAgriculturalUniversityMicrobiologyEnglishEditionCourseware延时符Contents目录IntroductiontoMicrobiologyMicrobialCellStructureandFunctionMicrobialMetabolismMicrobialGrowthandControl延时符Contents目录MicrobialGeneticsandEvolutionMicrobialApplicationsinAgricultureandBiotechnology延时符01IntroductiontoMicrobiologyDefinitionMicroorganismsaretinylivingorganismsthatareinvisibletothenakedeyeTheyincludebacteria,viruses,fungi,algae,andprotozooaCharacteristicsMicroorganismsarecommonlyunicoellarandlakecomplexissuesandorgansTheycansurviveinawiderangeofenvironments,fromextremeheatandcoldtohighpressureandsaltconcentrationDefinitionandCharacteristicsofMicroorganismsBacteriaaresinglecelledmicroorganismsthatlakeanucleusandotherorganellesTheyarethemostabundantmicroorganismsonEarthandplayimportantrolesinbothhumanhealthanddiseaseVirusesareevensmallerthanbacteriaandconsistencyofaproteinshellcalledacapsidandgeneticmaterial(DNAorRNA)TheycanonlyreplicateinsidelivingcellsandareresponsibleformanyhumanandanimaldiseasesFungiareeucaryoticmicroorganismsthatincludeyears,molds,androomsTheyplayimportantrolesincomposition,nutrientcycling,andfoodproductionBacteriaVirusesFungiClassificationofMicroorganismsClassificationofMicroorganismsAlgaearephotosyntheticeukaryoticmicroorganismsthatcanbefoundinbothfreshwaterandmarineenvironmentsSomealgaeareusedintheproductionoffood,fuel,andotherproductsAlgaeProtozooaaresinglecelledeucaryoticmicroorganismsthatcanmoveusingpseudopodsorciliaTheyarefoundinaquaticandsoilenvironmentsandsomespecificationsareparametersofhumansorotheranimalsProtozooaImportanceofMicroorganismsinBiologicalandAgriculturalSciencesBiotechnology:Microorganismsareusedinbiotechnologytoproducearangeofproducts,includingantibiotics,enzymes,vaccines,andbiofuelsAgriculture:Microorganismsplayimportantrolesinsoilfertility,plantgrowth,andpestcontrolTheyalsohelpinthecompositionoforganicmatterandthecyclingofnutrientsEnvironmentalProtection:Microorganismsareresponsibleforthecompositionofwasteandpollutants,sohelpingtocleanuptheenvironmentAnimalHusbandry:MicroorganismscanbeusedasprobioticstoimproveanimalhealthandproductionefficiencyTheyalsoplayimportantrolesinthedigestionandnutritionofanimals延时符02MicrobialCellStructureandFunction输入标题02010403ProkaryoticCellsProkaryotesareunicellularorganizationsthatlakeamembraneboundnucleusandotherinternalorganizationsTheyarethesmallestofthetwodomainsoflifeandincludebacteriaandarcheaProkaryotesarefurtherclassifiedaseitherGrampositiveorGramnegativebasedontheircellwallstructureandholdingpropertiesTheytypicallyhaveacircularDNAmoleculethatisnotcomputedwithinanucleusTheyhaveamoreintegratedcellstructurecomparedtoprocaryotes,includingmitochondria,chloroplasts,andGolgiapparatusEukaryotesarefurtherdividedintoseveralkingdoms,includinganimals,plants,fungi,andpropertiesEukaryotesaremorecomplexunilateralorganizationsthatposeamembraneboundnucleusandotherinternalorganizationsEukaryoticCellsThecellenvelopeistheoutermostlayerofacellandconsistencyoftheplasmamembraneandcellwallThecellwallisarigidstructurethatprovidesmechanicalsupportandprotectiontothecellInprocaryotes,thecellwalliscomposedofpeptidoglycan,whileeucaryoticcellsmayhaveacellbasedcellwallorlakeacellwallentirelyCellEnvelopeandCellWallCellmembersaresemimeasurablelivebillsthatregulatetheflowofmaterialsintoandoutofthecellTheyareconsistentofphospholipids,proteins,andcarbohydratesCellorganellesaremembraneboundstructureswithinthecellthatperformspecificfunctionsessentialforlifeprocesses010203CellMembranesandCellOrganelles延时符03MicrobialMetabolismCatabolismandAnabolismCatabolismThebreakdownofcomplexmoleculesintosimplerones,releasingenergyAnabolismThebiosynthesisofcomplexmoleculesfromsimpleones,consultingenergyAutomotiveMetabolismMicroorganismsthatcansynthesizetheirownorganiccompoundsfrominorganicsubstratesHeterotrophicMetabolismMicroorganismsthatrequireorganicsubstancesastheirsourceofcarbonandenergyAutomotiveandHeterotrophicMetabolismTheprocessofgrowingmicroorganismsinacontrolledenvironmentCultivationTheprocessofcellularresponse,whichreleasesenergyfromthebreakdownoforganicmatterResponseCultivationandRespiration延时符04MicrobialGrowthandControlVSMicroorganismshavetheabilitytomultipleandgrowinsuitableconditionsTheprocessofmicrobialgrowthincludesdifferentstagessuchaslagphase,exponentialphase,seasonalphase,anddeclinephaseCellDivisionMicrobialcellsdividethroughbinarysession,multiplesessions,orpaddingTheprocessofcelldivisionensuresthereproductionandpromotionofmicroorganismsMicrobialGrowthMicrobialGrowthandDevelopmentTemperatureisoneofthemostimportantfactorsthataffectmicrobialgrowthHighorlowtemperaturescaneffectivelycontrolmicrobialgrowthbyeitherinhibitingorkillingmicroorganismsThepHvalueoftheenvironmentcanalsoaffectmicrobialgrowthAcademicoralkalineconditionscaninhibitorpromotemicrobialgrowth,dependingonthemicrostructureanditstolerancetopHTemperatureControlPHControlControlofMicrobialGrowthSterilizationSterilizationisaprocessthatdestroysalllivingmicroorganismsinanobjectorenvironment,includingbacteria,viruses,fungi,andsporesItiscurrentlyachievedbyheattreatment,radiation,ortheuseofdefects要点一要点二PasteurizationPasteurizationisaprocessthatdestroysharmfulmicroorganismsinfoodorbeverageswhilepreservingthefood'squalityandsafetyItiscurrentlyachievedbyheatingthefoodorbeveragestoatemperaturethatishighenoughtokillpathogenicmicroorganismsbutnothighenoughtoaltertheirorganicpropertiesSterilizationandPasteurization延时符05MicrobialGeneticsandEvolutionMicrobialGenomeStructureandOrganizationSummary:Thissectionfocusesonthestructureandorganizationofmicrobialgenes,includingthedifferencesbetweenprokaryoticandeukaryoticmicroorganismsDetailsMicrobialgenesencodegenesthatencodeproteinsinvolvedinvariouscellularfunctions,suchasmetabolism,celldivision,andreproductionHorizontalgenetransfer,geneduplication,andgenelossarecommongeneticeventsinmicrobialevolutionProkaryoticgenesaregenerallysmallandsimple,withcircularDNAmolecules,whileeukaryoticmicroorganismshavelarger,morecomplexgeneswithlinearDNAMicrobialGenomeStructureandOrganizationGeneticRecognitionandMutationSummary:Thissectioncoversgeneticrecognition,mutation,andtheroleoftheseprocessesinmicrobialevolutionDetailsGeneticrecognitionistheprocessbywhichmicroorganismsidentifyandrespondtochangesintheirenvironment,suchasthepresenceofantibioticsorchangesintemperatureorpHMutationisageneticchangethatoccursduringDNAreplicationorrepair,leadingtochangesinthenucleotidesequenceofthegenomeMutationscanbebeneficial,neutral,orharshtothemicrobiology,andcanleadtoadaptiveevolutioninresponsetoenvironmentalchangesGeneticRecognitionandMutationSummary:Thissectionexplorestherelationshipbetweenmicrobialevolutionandtaxation,includingtheclassificationandidentificationofmicroorganismsMicrobialEvolutionandTaxonomyMicrobialEvolutionandTaxonomyDetailsTaxonomyisthescienceofclassificationandnamingorganizationsbasedontheirevolutionaryrelationshipsMicrobialtaxationoftendependsongeneticsequenceanalysistodeterminephysiologicalrelationshipsandidentifynewspecificationsorgeneralMicrobialevolutionisimportantinunderstandingtheemergenceofnewdiseases,thedevelopmentofantimicrobialresistance,andthebiogeochemicalcyclesthatshapeEarth'senvironment延时符06MicrobialApplicationsinAgricultureandBiotechnologyBiocontrolAgentsandBiopoliciesBiocontrolagentsNaturalenergies:Useofpredictors,parasitoids,andpathogenstocontrolpestsCompetition:Useoffastgrowingorsuperiorcompetitorstoexcludeorreducepestpopu