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Phytochrome A resets the circadian clock and delays tuber formation under long days in potato
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Yanovsky, Marcelo J., Izaguirre, Miriam, Wagmaister, Javier A., Gatz, Christiane, Jackson, Stephen D., Thomas, Brian and Casal, Jorge J. (2000) Phytochrome A resets the circadian clock and delays tuber formation under long days in potato. The Plant Journal, Volume 23 (Number 2). pp. 223-232. doi:10.1046/j.1365-313X.2000.00775.x
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Official URL: http://dx.doi.org/10.1046/j.1365-313x.2000.00775.x
Abstract
Transgenic potatoes (Solanum tuberosum) with either increased (sense transformants) or reduced (antisense transformants) phytochrome A (phyA) levels were used, in combination with specific light treatments, to investigate the involvement of phyA in the perception of signals that entrain the circadian clock. Far-red or far-red plus red light treatments given during the night reset the circadian rhythm of leaf movements in wild-type plants and phyA over-expressors, but had little effect in phyA under-expressors. Far-red light was also able to reset the rhythm of leaf movement in wild-type Arabidopsis thaliana but was not effective in mutants without phyA. Blue light was necessary to reset the rhythm in phyA-deficient potato plants. Resetting of the rhythm by far-red plus red light was only slightly affected in transgenic plants with reduced levels of phytochrome B. The production of tubers was delayed by day extensions with far-red plus red light, but this effect was reduced in transgenic lines deficient in phyA. We conclude that phyA is involved in resetting the circadian clock controlling leaf movements and in photoperiod sensing in light-grown potato plants.
| Item Type: | Journal Article | ||||
|---|---|---|---|---|---|
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Life Sciences (2010- ) | ||||
| Journal or Publication Title: | The Plant Journal | ||||
| Publisher: | Wiley-Blackwell Publishing Ltd. | ||||
| ISSN: | 0960-7412 | ||||
| Official Date: | July 2000 | ||||
| Dates: |
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| Volume: | Volume 23 | ||||
| Number: | Number 2 | ||||
| Page Range: | pp. 223-232 | ||||
| DOI: | 10.1046/j.1365-313X.2000.00775.x | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Restricted or Subscription Access |
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