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《THE DEVELOPMENT OF A BIOLOGICAL NOVELTY A DIFFERENT WAY TO MAKEAPPENDAGES AS REVEALED IN THE SNOUT OF THE STAR-NOSED MOLECONDYLURA CRISTATA一种生物的新颖性的发展：一种不同的方式来做 星形鼻鼹鼻中的附属物 鸡冠花尖锐湿疣》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。
1、TheJournalofExperimentalBiology202,2719–2726(1999)2719PrintedinGreatBritain©TheCompanyofBiologistsLimited1999JEB2151THEDEVELOPMENTOFABIOLOGICALNOVELTY:ADIFFERENTWAYTOMAKEAPPENDAGESASREVEALEDINTHESNOUTOFTHESTAR-NOSEDMOLECONDYLURACRISTATAKENNETHC.CATANIA
2、1,*,R.GLENNNORTHCUTT2ANDJONH.KAAS11DepartmentofPsychology,VanderbiltUniversity,301WilsonHall,Nashville,TN37240,USAand2DepartmentofNeurosciences,0201,UniversityofCalifornia,SanDiego,9500GilmanDrive,LaJolla,CA92093-0201,USA*e-mail:Catania@ctrvax.vanderbi
3、lt.eduAccepted8July;publishedonWWW30September1999SummaryThenoseofthestar-nosedmoleCondyluracristataisaonlyatthetipofthesnout.Asaresultofthisuniquecomplexbiologicalnoveltyconsistingof22epidermal‘unfolding’formation,therostralendofeachadultappendages.How
4、didthisnewsetoffacialappendagesappendageisderivedfromcaudalembryonicfacialtissue,arise?Recentstudiesfindremarkableconservationofthewhilethecaudalendofeachappendageisderivedfromgenesexpressedduringappendageformationacrossphyla,rostralfacialtissue.Thisdev
5、elopmentalprocesshassuggestingthatthebasicmechanismsforappendageessentiallynooutgrowthphaseandresultsinthereversaldevelopmentareancient.Inthenoseofthesemoles,oftheoriginalembryonicorientationofeachappendage.however,wefindauniquepatternofappendageThisdif
6、fersfromthedevelopmentofotherknownmorphogenesis,showingthatevolutioniscapableofappendages,whichoriginateeitherasoutgrowthsoftheconstructingappendagesindifferentways.Duringbodywallorfromsubdivisionsofoutgrowths(e.g.tetrapoddevelopment,thenasalappendages
7、ofthemolebeginasadigits).Adultsofadifferentmolespecies(Scapanusseriesofwavesintheepidermis.Aseconddeeplayeroftownsendii)exhibitastar-likepatternthatresemblesanepidermisthengrowsunderthesesuperficialepidermalembryonicstageofthestar-nosedmole,suggestingth
8、atthewavestoproduce22separate,elongatedepidermaldevelopmentofthestarrecapitulatesstagesofitsevolution.cylindersembeddedinthesideofthemole’sface.ThecaudalendofeachcylinderlatereruptsfromthefaceandKeywords:ontogeny,phylogeny,evolution,rec
