DOI: 10.1104/pp.117.4.1205. A Novel Gene, <i>pmgA</i>, Specifically Regulates Photosystem Stoichiometry in the Cyanobacterium<i>Synechocystis</i> Species PCC 6803 in Response to High Light1

A Novel Gene, pmgA, Specifically Regulates Photosystem Stoichiometry in the CyanobacteriumSynechocystis Species PCC 6803 in Response to High Light1

10.1104/pp.117.4.1205

Crossref journal-article

Oxford University Press (OUP)

Plant Physiology (286)

Abstract

Abstract Previously, we identified a novel gene, pmgA, as an essential factor to support photomixotrophic growth of Synechocystis species PCC 6803 and reported that a strain in which pmgA was deleted grew better than the wild type under photoautotrophic conditions. To gain insight into the role of pmgA, we investigated the mutant phenotype of pmgA in detail. When low-light-grown (20 μE m−2 s−1) cells were transferred to high light (HL [200μE m−2s−1]), pmgA mutants failed to respond in the manner typically associated with Synechocystis. Specifically, mutants lost their ability to suppress accumulation of chlorophyll and photosystem I and, consequently, could not modulate photosystem stoichiometry. These phenotypes seem to result in enhanced rates of photosynthesis and growth during short-term exposure to HL. Moreover, mixed-culture experiments clearly demonstrated that loss ofpmgA function was selected against during longer-term exposure to HL, suggesting that pmgA is involved in acquisition of resistance to HL stress. Finally, early induction ofpmgA expression detected by reverse transcriptase-PCR upon the shift to HL led us to conclude that pmgA is the first gene identified, to our knowledge, as a specific regulatory factor for HL acclimation.

Bibliography

Hihara, Y., Sonoike, K., & Ikeuchi, M. (1998). A Novel Gene, pmgA, Specifically Regulates Photosystem Stoichiometry in the CyanobacteriumSynechocystis Species PCC 6803 in Response to High Light1. Plant Physiology, 117(4), 1205â1216.

Authors 3

Yukako Hihara (first)
Kintake Sonoike (additional)
Masahiko Ikeuchi (additional)

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Dates

Type	When
Created	23 years, 1 month ago (July 27, 2002, 1 a.m.)
Deposited	4 years, 3 months ago (May 3, 2021, 6:55 a.m.)
Indexed	5 days, 8 hours ago (Aug. 23, 2025, 9:48 p.m.)
Issued	27 years ago (Aug. 1, 1998)
Published	27 years ago (Aug. 1, 1998)
Published Online	27 years ago (Aug. 1, 1998)
Published Print	27 years ago (Aug. 1, 1998)

Funders 0

None

BibTeX

@article{Hihara_1998, title={A Novel Gene, pmgA, Specifically Regulates Photosystem Stoichiometry in the CyanobacteriumSynechocystis Species PCC 6803 in Response to High Light1}, volume={117}, ISSN={0032-0889}, url={http://dx.doi.org/10.1104/pp.117.4.1205}, DOI={10.1104/pp.117.4.1205}, number={4}, journal={Plant Physiology}, publisher={Oxford University Press (OUP)}, author={Hihara, Yukako and Sonoike, Kintake and Ikeuchi, Masahiko}, year={1998}, month=aug, pages={1205–1216} }

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