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Phytochrome regulation of phytochrome A mRNA levels in the model short-day-plant Pharbitis nil
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Carter, Charlotte E., Szmidt‐Jaworska, A., Hughes, M., Thomas, Brian and Jackson, Stephen D. (2000) Phytochrome regulation of phytochrome A mRNA levels in the model short-day-plant Pharbitis nil. Journal of Experimental Botany, Volume 51 (Number 345). pp. 703-711. doi:10.1093/jexbot/51.345.703
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Official URL: http://dx.doi.org/10.1093/jexbot/51.345.703
Abstract
The exposure of dark‐grown Pharbitis nil seedlings to continuous R induces a rapid decrease in PHYA mRNA abundance with a half‐life of about 2 h. A 5 min R pulse also induces this decline, and the effect is partially reversible by subsequent FR irradiation, confirming that the regulation of expression is mediated via the Pfr form of a phytochrome. When de‐etiolated seedlings are returned to darkness after a W photoperiod, PHYA mRNA slowly reaccumulates from 20% to 50% of the dark level within 24 h. The rate of reaccumulation is greatly accelerated by the removal of Pfr with a FR pulse, resulting in reaccumulation to 100% within approximately 11 h. Without FR irradiation PHYA mRNA expression remains fully repressed for at least 11 h after the end of the photoperiod, suggesting that the controlling Pfr is highly stable.
| Item Type: | Journal Article | ||||
|---|---|---|---|---|---|
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Life Sciences (2010- ) | ||||
| Journal or Publication Title: | Journal of Experimental Botany | ||||
| Publisher: | Oxford University Press | ||||
| ISSN: | 0022-0957 | ||||
| Official Date: | April 2000 | ||||
| Dates: |
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| Volume: | Volume 51 | ||||
| Number: | Number 345 | ||||
| Page Range: | pp. 703-711 | ||||
| DOI: | 10.1093/jexbot/51.345.703 | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Restricted or Subscription Access |
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