Inheritance of mitochondrial and chloroplast genomes in the isogamous brown alga Scytosiphon lomentaria (Phaeophyceae)
Inheritance of mitochondrial and chloroplast genomes in the isogamous brown alga Scytosiphon lomentaria (Phaeophyceae)
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DOI：
10.1111/j.1440-1835.2006.00409.x
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发表时间：
2006-03
影响因子：
1.5
通讯作者：
Y. Kato;K. Kogame;Chikako Nagasato;T. Motomura
中科院分区：
文献类型：
--
作者：
Y. Kato;K. Kogame;Chikako Nagasato;T. Motomura
通过荧光显微镜和单倍型基因组标记检查同配褐藻 Scytosiphon lomentaria (Lyngbye) Link 中叶绿体和线粒体的遗传模式。该物种受精卵的萌发是单侧的，生长的叶状体完全由胚管发育而来，原始的受精卵细胞除了形成毛发外不发育。叶绿体的遗传是双亲的，两个亲本叶绿体分配到第一个孢子体细胞是偶然的：母本或父本叶绿体从受精卵迁移到生殖管细胞中，而另一个叶绿体保留在原始细胞中。相比之下，孢子体所有细胞中的线粒体基因组仅来自雌配子（母系遗传）。这些遗传模式与同配褐藻 Ectocarpus siliculosus (Dillwyn) Lyngbye 的遗传模式相似。线粒体的母系遗传可能在褐藻中普遍存在。
Patterns of inheritance of chloroplasts and mitochondria were examined by fluorescence microscopy and haplotype genome markers in the isogamous brown alga Scytosiphon lomentaria (Lyngbye) Link. Germination of the zygote in this species was unilateral, the growing thallus developed entirely from the germ tube, and the original zygote cell did not develop except for the formation of a hair. Inheritance of chloroplasts was biparental, and partitioning of the two parental chloroplasts into the first sporophytic cells was accidental: either the maternal or the paternal chloroplast was migrated from the zygote into the germ tube cell, whereas the other chloroplast remained in the original cell. In contrast, the mitochondrial genome in all cells of the sporophyte came only from the female gamete (maternal inheritance). These inheritance patterns are similar to those of the isogamous brown alga Ectocarpus siliculosus (Dillwyn) Lyngbye. Maternal inheritance of mitochondria might be universal in brown algae.