Chloroplast DNA Dynamics: Copy Number, Quality Control and Degradation
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- Wataru Sakamoto
- Institute of Plant Science and Resources, Okayama University, Kurashiki, Okayama, 710-0046 Japan
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- Tsuneaki Takami
- Institute of Plant Science and Resources, Okayama University, Kurashiki, Okayama, 710-0046 Japan
書誌事項
- 公開日
- 2018-04-20
- 資源種別
- journal article
- 権利情報
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- https://academic.oup.com/journals/pages/about_us/legal/notices
- DOI
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- 10.1093/pcp/pcy084
- 公開者
- Oxford University Press (OUP)
この論文をさがす
説明
Endosymbiotically originated chloroplast DNA (cpDNA) encodes part of the genetic information needed to fulfill chloroplast function, including fundamental processes such as photosynthesis. In the last two decades, advances in genome analysis led to the identification of a considerable number of cpDNA sequences from various species. While these data provided the consensus features of cpDNA organization and chloroplast evolution in plants, how cpDNA is maintained through development and is inherited remains to be fully understood. In particular, the fact that cpDNA exists as multiple copies despite its limited genetic capacity raises the important question of how copy number is maintained or whether cpDNA is subjected to quantitative fluctuation or even developmental degradation. For example, cpDNA is abundant in leaves, where it forms punctate structures called nucleoids, which seemingly alter their morphologies and numbers depending on the developmental status of the chloroplast. In this review, we summarize our current understanding of 'cpDNA dynamics', focusing on the changes in DNA abundance. A special focus is given to the cpDNA degradation mechanism, which appears to be mediated by Defective in Pollen organelle DNA degradation 1 (DPD1), a recently discovered organelle exonuclease. The physiological significance of cpDNA degradation in flowering plants is also discussed.
収録刊行物
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- Plant and Cell Physiology
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Plant and Cell Physiology 59 (6), 1120-1127, 2018-04-20
Oxford University Press (OUP)
