资源描述：
《微生物学笔记(武汉大学)2（notes on microbiology (wuhan university) 2）》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。
1、微生物学笔记(武汉大学)2（NotesonMicrobiology(WuhanUniversity)2）NotesonMicrobiology(WuhanUniversity)2Themodeofpropagationoffungi:1)asexualsporepropagationTheprocessofformingnewindividualswithoutvegetativecelldifferentiationisthedivisionofvegetativecellsorthedifferentiation(cleav
2、age)ofvegetativehyphae.Theasexualsporesare:spores,spores,conidia,spores,etc..2)sexualsporepropagationTwotheprocessbywhichindividualcellscombinetoproducenewindividuals:A)disposition:twoindividualcellsbindtocytoplasmandbecomebinuclearcells.Eachnucleuscontainshaploidchr
3、omosomes(n+n).B)nuclearfusion:thefusionoftwonucleiintodiploidzygotenuclei,atwhichtimethenumberofchromosomesistwotimes(2n).C)meiosis:thenucleusofadiploidbodypassesthroughmeiosis,andthenumberofchromosomesinthenucleusisrestoredtoahaploidstate.Characteristicsofsexualspor
4、epropagationinfungi:Aisnotasgoodasasexualreproduction,thenoftenassociatedwithcommon,morenaturalconditions,ingeneralNotcommonontheculturemedium.B)themethodvariesaccordingtothestrain,andsometwovegetativehyphaecanbedirectlycombined,Othersarematedbyspecialsexcells(sexual
5、organs)toformsexualspores.(c)nucleardivisionimmediatelyaftermeiosis,sothenumberofchromosomesishaploid,Thediploidisrestrictedtothezygote.D)moldofsexualreproductionishomothallismandheterothallismintwocases.(E)thesexualsporesoffungi,includingspores,eggs,spores,andspores
6、.Lifecycleoffungi:Duringasexualpropagation,asexualsporesareformedinthemycelium(vegetativebody)undersuitableconditions,andasexualsporesgerminatetoformnewhyphae,repeatedmanytimes.Thestageofsexualreproduction;inthelatestageofdevelopment,undercertainconditions,aspecialor
7、gandifferentiationonthemycelium(cell),plasmogamy,nucleardistribution,aftermeiosisforminghaploidsporesgermination,thenformnewmycelium.Therearesomefungi,ashasbeenfoundtosexualreproductionstageinitslifehistory,thiskindoffunguscalleddeuteromycetes.Characteristicsofmoldsp
8、ores:Moldhasastrongreproductivecapacity,andcanproducelargenumbersofnewindividualsthroughasexualreproductionorsexualreproduction.Alt
