Achromosomal cleavage of fertilized starfish eggs in the presence of aphidicolin☆
[摘要] Developmentoffertilizedeggsofstarfish,Asterinapectinifera,wasstudiedinthepresenceofaphidicolin,aspecificinhibitorofeukaryoticDNAsynthesis.Fertilizedeggscontinuedtocleaveeightorninetimesinthepresenceofaphidicolin,althoughthedelayofdevelopmentwasobservedandthesizeofblastomereswasnotequal.Thenucleusandchromosomeswereundetectableinblastomeresofembryosdevelopedinthepresenceofaphidicolin,althoughtheamphiasterwasclearlyvisibleinthecytoplasm.DNAsynthesisofsuchembryoswasnearlycompletelysuppressed.Thesemorphologicalandbiochemicallinesofevidenceindicatethattheabovecleavageisindependentofchromosomalreplication.Thestagewhenachromosomaldivisionsceaseandembryosbegintodiecorrespondstotheonsetofblastulation,suggestingthatinformationderivedfromtheembryogenomeisrequiredforblastulaformationinthisspecies.
[发布日期] [发布机构]
[效力级别] [学科分类] 生物科学（综合）
[关键词] [时效性]
