Two NADPH: Protochlorophyllide Oxidoreductase (POR) Isoforms Play Distinct Roles in Environmental Adaptation in Rice
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- 作者：Choon-Tak Kwon ; Suk-Hwan Kim ; Giha Song ; Dami Kim ; Nam-Chon Paek
- 关键词：Rice ; Faded green leaf ; OsPORA ; OsPORB ; Chlorophyll synthesis
- 刊名：Rice
- 出版年：2017
- 出版时间：December 2017
- 年：2017
- 卷：10
- 期：1
- 全文大小：4322KB
- 刊物主题：Plant Sciences; Plant Genetics & Genomics; Plant Breeding/Biotechnology; Agriculture; Plant Ecology;
- 出版者：Springer US
- ISSN：1939-8433
- 卷排序：10
文摘
BackgroundNADPH: protochlorophyllide oxidoreductase (POR) is an essential enzyme that catalyzes the photoreduction of protochlorophyllide to chlorophyllide, which is ultimately converted to chlorophyll in developing leaves. Rice has two POR isoforms, OsPORA and OsPORB. OsPORA is expressed in the dark during early leaf development; OsPORB is expressed throughout leaf development regardless of light conditions. The faded green leaf (fgl) is a loss-of-function osporB mutant that displays necrotic lesions and variegation in the leaves due to destabilized grana thylakoids, and has increased numbers of plastoglobules in the chloroplasts. To investigate whether the function of OsPORA can complement that of OsPORB, we constitutively overexpressed OsPORA in fgl mutant.