Changes in the transcriptional activity of barley plastome genes under heat shock

Changes in the transcriptional activity of barley plastome genes under heat shock Plants use a wide range of molecular reactions for adaptation of their photosynthetic apparatus to high temperature. To understand the role of plastome genes in this process, we studied transcription of photosynthetic and household genes in plastids of 7-day-old barley (Hordeum vulgare L.) seedlings and found that the genes of both groups are involved in the adaptation to heat shock. Transcription of genes encoding apoproteins of the photosystem I and photosystem II reaction centers was enhanced in 1.5 h after temperature elevation and reduced after 3 h, whereas transcription of some other genes (NADPH plastoquinone oxidoreductase, ribosomal proteins, and multisubunit RNA polymerase) was enhanced after 3 h of exposure to high temperature. Transcription of plastome genes rpl23-rpl2 and rps16 was activated by heating either the whole plant or isolated chloroplasts. This permits a supposition that changes in transcription of plastome genes occur not only due to changes in nuclear transcription of the genes encoding plastid transcription factors but also due to changes in the properties of transcription factors inside chloroplasts. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Plant Physiology Springer Journals

Changes in the transcriptional activity of barley plastome genes under heat shock

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Publisher
SP MAIK Nauka/Interperiodica
Copyright
Copyright © 2008 by MAIK Nauka
Subject
Life Sciences; Plant Sciences ; Plant Physiology
ISSN
1021-4437
eISSN
1608-3407
D.O.I.
10.1134/S1021443708030011
Publisher site
See Article on Publisher Site

Abstract

Plants use a wide range of molecular reactions for adaptation of their photosynthetic apparatus to high temperature. To understand the role of plastome genes in this process, we studied transcription of photosynthetic and household genes in plastids of 7-day-old barley (Hordeum vulgare L.) seedlings and found that the genes of both groups are involved in the adaptation to heat shock. Transcription of genes encoding apoproteins of the photosystem I and photosystem II reaction centers was enhanced in 1.5 h after temperature elevation and reduced after 3 h, whereas transcription of some other genes (NADPH plastoquinone oxidoreductase, ribosomal proteins, and multisubunit RNA polymerase) was enhanced after 3 h of exposure to high temperature. Transcription of plastome genes rpl23-rpl2 and rps16 was activated by heating either the whole plant or isolated chloroplasts. This permits a supposition that changes in transcription of plastome genes occur not only due to changes in nuclear transcription of the genes encoding plastid transcription factors but also due to changes in the properties of transcription factors inside chloroplasts.

Journal

Russian Journal of Plant PhysiologySpringer Journals

Published: May 15, 2008

References

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