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A laboratory simulation of Arabidopsis seed dormancy cycling provides new insight into its regulation by clock genes and the dormancy-related genes DOG1 , MFT , CIPK23 and PHYA
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Footitt, Steven, Ölcer-Footitt, Hülya, Hambidge, Angela J. and Finch-Savage, William E. (2017) A laboratory simulation of Arabidopsis seed dormancy cycling provides new insight into its regulation by clock genes and the dormancy-related genes DOG1 , MFT , CIPK23 and PHYA. Plant, Cell & Environment, 40 (8). pp. 1474-1486. doi:10.1111/pce.12940
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Official URL: http://dx.doi.org/10.1111/pce.12940
Abstract
Environmental signals drive seed dormancy cycling in the soil to synchronise germination with the optimal time of year; a process essential for species fitness and survival. Previous correlation of transcription profiles in exhumed seeds with annual environmental signals revealed the coordination of dormancy regulating mechanisms with the soil environment. Here, we developed a rapid and robust laboratory dormancy cycling simulation. The utility of this simulation was tested in two ways. Firstly using mutants in known dormancy-related genes (DELAY OF GERMINATION 1 (DOG1), MOTHER OF FLOWERING TIME (MFT), CBL-INTERACTING PROTEIN KINASE 23 (CIPK23) and PHYTOCHROME A (PHYA)). Secondly, using further mutants we test the hypothesis that components of the circadian clock are involved in coordination of the annual seed dormancy cycle. The rate of dormancy induction and relief differed in all lines tested. In the mutants, dog1-2 and mft2, dormancy induction was reduced but not absent. DOG1 is not absolutely required for dormancy. In cipk23 and phyA dormancy induction was accelerated. Involvement of the clock in dormancy cycling was clear when mutants in the morning and evening loops of the clock were compared. Dormancy induction was faster when the morning loop was compromised and delayed when the evening loop was compromised.
| Item Type: | Journal Article | ||||||||||
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| Subjects: | Q Science > QK Botany | ||||||||||
| Divisions: | Faculty of Science > Life Sciences (2010- ) | ||||||||||
| Library of Congress Subject Headings (LCSH): | Arabidopsis -- Seeds -- Dormancy, Arabidopsis -- Life cycles, Germination, Plant life cycles, Circadian rhythms | ||||||||||
| Journal or Publication Title: | Plant, Cell & Environment | ||||||||||
| Publisher: | Wiley-Blackwell Publishing Ltd. | ||||||||||
| ISSN: | 0140-7791 | ||||||||||
| Official Date: | August 2017 | ||||||||||
| Dates: |
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| Volume: | 40 | ||||||||||
| Number: | 8 | ||||||||||
| Page Range: | pp. 1474-1486 | ||||||||||
| DOI: | 10.1111/pce.12940 | ||||||||||
| Status: | Peer Reviewed | ||||||||||
| Publication Status: | Published | ||||||||||
| Access rights to Published version: | Restricted or Subscription Access | ||||||||||
| Funder: | Biotechnology and Biological Sciences Research Council (Great Britain) (BBSRC) | ||||||||||
| Grant number: | BB/I022201/1 |
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