地中海伞藻(Acetabularia mediterranea)叶绿体DNA串联重复顺序的克隆和限制性内切酶图谱分析

以COS质粒(cosmid)pCOS 2EMBL 为载体,构建了地中海伞藻叶绿体基因组分子克隆库,并且筛选到含有串联重复顺序的克隆。经限制性内切酶酶解图谱分析,证明了串联重复顺序的存在,重复次数为4次以上。     

地中海伞藻叶绿体生物节律基因的分子克隆及限制酶图谱分析

本用分离纯化的地中海伞藻叶绿体ＤＮＡ，以ｐｃｏｓ２ ＥＭＢＬ为载体构建了ｃｏｓｍｉｄ分子克隆库。并用果蝇的与生物节律控制相关的ＤＮＡ顺序为探针，从地中海伞藻叶绿体ｃｏｓｍｉｄ分子克隆库中筛选到一组含有同源顺序的克隆，经印迹杂交和限制酶分析，这些克隆都含有与果蝇生物节律探针强烈同ＤＮＡ顺序，且各克隆的限制酶图谱都相互重叠。这一结果表明，在地中海伞藻叶绿体基因组中可能也存在与果蝇相同或基本相同的与生     

Preferential destruction of chloroplast nucleoids in zygotes in green algaeDictyosphaeria cavernosa andAcetabularia calyculus

Summary The preferential destruction of chloroplast nucleoids in young zygotes in the coenocytic algaDictyosphaeria cavernosa and the giant unicellular algaAcetabularia calyculus was studied by high resolution epifluorescent microscopy. The chloroplast nucleoids (DNA) in the chloroplast from one of the parents were preferentially destroyed soon after the mating of male and female gametes.