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首页> 外文期刊>Protoplasma: An International Journal of Cell Biology >Two types of plastid ftsZ genes in the liverwort Marchantia polymorpha
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Two types of plastid ftsZ genes in the liverwort Marchantia polymorpha

机译:地麦多形马氏体中的两种质体ftsZ基因。

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Two types of ftsZ genes (MpftsZ1 and MpftsZ2) were isolated from the liverwort Marchantia polymorpha by degenerate reverse transcription PCR. The MpFtsZ1 and MpFtsZ2 proteins are predicted to localize in chloroplasts. Genomic Southern analysis suggested that each ftsZ gene is a single-copy nuclear gene. Northern analysis confirmed that both genes are active. A phylogenetic tree constructed with the deduced MpFtsZ amino acid sequences suggests that MpFtsZ1 and MpFtsZ2 can be classified into the plant chloroplastic FtsZ1 and FtsZ2 families, respectively. This result suggests that two ftsZ families exist universally in land plants. The determination of the intron structures of both MpftsZ genes supported this hypothesis. The transformation of a sense MpftsZ2 overexpression construct into M. polymorpha produced a large chloroplast phenotype in a transgenic plant. The mean number of chloroplasts was 38.2 (standard deviation, 21.4; n = 200) in epidermal cells of wild-type plants, whereas the mean number of chloroplasts was 7.4 (standard deviation, 4.4; n = 200) in the transgenic plant. Southern analysis showed that the cauliflower mosaic virus 35S promoter-MpftsZ2 construct was inserted in at least three positions. Northern analysis suggested that the high accumulation of MpftsZ2 mRNA blocked plastid division. Determination of the chlorophyll content and the chlorophyll fluorescence parameters suggested that the macrochloroplasts function like chloroplasts in wild-type plants under normal light conditions. However, the transgenic plant grew more slowly than did wild-type plants. [References: 41]
机译:通过简并逆转录PCR从多形艾蒿的Marchantia polymorpha中分离出两种类型的ftsZ基因(MpftsZ1和MpftsZ2)。预测MpFtsZ1和MpFtsZ2蛋白位于叶绿体中。 Southern的基因组分析表明,每个ftsZ基因都是单拷贝核基因。 Northern分析证实这两个基因均具有活性。用推导的MpFtsZ氨基酸序列构建的系统树表明,MpFtsZ1和MpFtsZ2可以分别分为植物叶绿体FtsZ1和FtsZ2家族。这个结果表明在陆地植物中普遍存在两个ftsZ家族。两个MpftsZ基因内含子结构的确定支持这一假设。 MpftsZ2正义表达构建体转化为多形分支杆菌在转基因植物中产生了大的叶绿体表型。野生型植物的表皮细胞中叶绿体的平均数为38.2(标准差,21.4; n = 200),而转基因植物中叶绿体的平均数为7.4(标准差,4.4; n = 200)。 Southern分析表明,花椰菜花叶病毒35S启动子-MpftsZ2构建体插入了至少三个位置。 Northern分析表明,MpftsZ2 mRNA的高积累阻止了质体分裂。叶绿素含量和叶绿素荧光参数的测定表明,在正常光照条件下,大叶绿体的功能类似于野生型植物中的叶绿体。然而,转基因植物的生长比野生型植物慢。 [参考:41]

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