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Plant and Cell Physiology, 2002, Vol. 43, No. 5 573-577
© 2002 Oxford University Press

Short Communications

Photosynthetic Electron Transport Regulates the Stability of the Transcript for the Protochlorophyllide Oxidoreductase Gene in the Liverwort, Marchantia paleacea var. diptera

Saeko Eguchi1, Hiroyoshi Takano1, Kanji Ono2 and Susumu Takio3,4

1 Graduate School of Science and Technology, Kumamoto University, Kurokami, Kumamoto, 860-8555 Japan 2 Department of Biological Science, Faculty of Science, Kumamoto University, Kurokami, Kumamoto, 860-8555 Japan 3 Center for Marine Environment Studies, Kumamoto University, Kurokami, Kumamoto, 860-8555 Japan

Abstract

The transfer of Marchantia paleacea var. diptera cells to darkness caused a reversible repression in the accumulation of transcript for a gene, por, encoding the NADPH: protochlorophyllide oxidoreductase (EC 1.3.1.33). The photosynthetic inhibitor DCMU and DBMIB repressed the accumulation in light. In the presence of transcription inhibitor cordycepin, not only incubation in the dark but also addition of DCMU or DBMIB in light stimulated the degradation of the por transcript. These findings suggest that photosynthetic electron transport is involved in regulating the stability of the por transcript.

Footnotes

4 Corresponding author: E-mail, stakio@kumamoto-u.ac.jp; Fax, +81-96-342-3431.


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