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Seed dormancy cycling and the regulation of dormancy mechanisms to time germination in variable field environments
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Finch-Savage, William E. and Footitt, Steven (2017) Seed dormancy cycling and the regulation of dormancy mechanisms to time germination in variable field environments. Journal of Experimental Botany, 68 (4). pp. 843-856. doi:10.1093/jxb/erw477
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Official URL: https://doi.org/10.1093/jxb/erw477
Abstract
Many molecular mechanisms that regulate dormancy have been identified individually in controlled laboratory studies. However, little is known about how the seed employs this complex suite of mechanisms during dormancy cycling in the variable environment of the soil seed bank. Nevertheless, this behavior is essential to ensure germination takes place in a favourable habitat and climate space, and in the correct season for the resulting plant to complete its life cycle. During their time in the soil seed bank seeds continually adjust their dormancy status by sensing a range of environmental signals. Those related to slow seasonal change (e.g. temperature) are used for temporal sensing to determine the time of year and depth of dormancy. This alters their sensitivity to signals related to their spatial environment (e.g. light, nitrate, water potential) that indicate conditions are suitable for germination, and so trigger the termination of dormancy. We review work on the physiological, molecular and ecological aspects of seed dormancy in Arabidopsis and interpret it in the context of dormancy cycling in the soil seed bank. This approach has provided new insight into the coordination of mechanisms and signaling networks and the multidimensional sensing that regulates dormancy cycling in a variable environment.
Item Type: | Journal Item | ||||||
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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: | 24 January 2017 | ||||||
Dates: |
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Volume: | 68 | ||||||
Number: | 4 | ||||||
Page Range: | pp. 843-856 | ||||||
DOI: | 10.1093/jxb/erw477 | ||||||
Status: | Peer Reviewed | ||||||
Publication Status: | Published | ||||||
Access rights to Published version: | Restricted or Subscription Access | ||||||
Date of first compliant deposit: | 15 December 2016 | ||||||
Date of first compliant Open Access: | 24 January 2018 | ||||||
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