Mechanisms for independent cytoplasmic inheritance of mitochondria and plastids in angiosperms
Mechanisms for independent cytoplasmic inheritance of mitochondria and plastids in angiosperms
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DOI：
10.1007/s10265-009-0293-x
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发表时间：
2010-03-01
影响因子：
2.8
通讯作者：
Nagata, Noriko
中科院分区：
文献类型：
--
作者：
Nagata, Noriko
被子植物线粒体和质体的遗传可分为母系、双亲和父系三种方式。已经提出了许多母系遗传的机制，包括：(1)花粉有丝分裂I(PMI)期间细胞器本身的物理排斥；(2)通过形成去核细胞质小体(ECB)来消除细胞器；(3)雄配子体发育期间细胞器的自噬降解；(4)受精后细胞器的消化；以及(5)最可能的--PMI后生殖细胞中的细胞器DNA被消化。在详细的细胞学观察中，生殖细胞中线粒体和质体DNA的存在或不存在对应于经遗传检查的相应细胞器的双亲/父系遗传或母系遗传。这些改进的细胞学观察表明，细胞器DNA在PMI后不久在年轻生殖细胞中的复制或消化是决定细胞质遗传方式的临界点。本文综述了导致被子植物细胞质遗传差异的线粒体和叶绿体的独立控制机制。
The inheritance of mitochondria and plastids in angiosperms has been categorized into three modes: maternal, biparental and paternal. Many mechanisms have been proposed for maternal inheritance, including: (1) physical exclusion of the organelle itself during pollen mitosis I (PMI); (2) elimination of the organelle by formation of enucleated cytoplasmic bodies (ECB); (3) autophagic degradation of organelles during male gametophyte development; (4) digestion of the organelle after fertilization; and (5)-the most likely possibility-digestion of organellar DNA in generative cells just after PMI. In detailed cytological observations, the presence or absence of mitochondrial and plastid DNA in generative cells corresponds to biparental/paternal inheritance or maternal inheritance of the respective organelle examined genetically. These improved cytological observations demonstrate that the replication or digestion of organellar DNA in young generative cells just after PMI is a critical point determining the mode of cytoplasmic inheritance. This review describes the independent control mechanisms in mitochondria and plastids that lead to differences in cytoplasmic inheritance in angiosperms.