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Annals of Botany 2008 101(3):NP; doi:10.1093/aob/mcn004
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© The Author 2008. Published by Oxford University Press on behalf of the Annals of Botany Company. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org

John Bryant takes a closer look at some of this month's Original Articles

J. A. Bryant, Professor

University of Exeter, UK E-mail j.a.bryant@exeter.ac.uk

The first 10% of the full text of this article appears below.

Seed strategy centred on cycling sensitivity


Figure 1
Plants whose seeds form long-lived seed banks exhibit a range of strategies to spread germination potential over a protracted period. One of these, seasonal cycling in germinability, has been studied by Jayasuriya et al., at Lexington, USA (pp. 341–352) in Ipomoea lacunosa, a member of the Convolvulaceae and a troublesome weed in the USA. It forms seed banks and the seeds may remain viable for 40 years. Dormancy is physical: the hard seed coat prevents water uptake. Dormancy may be broken by scarification of the seed coat or by opening of the water gap. It has been claimed that the seeds exhibit dormancy cycling but, as the authors point out, it is impossible to re-impose physical dormancy once the seed coat has been breached or . . . [Full Text of this Article]

Grass genome evolution – a story with GC bits

The flowers that bloom in the spring...

Photosynthesis saved by specific Si siting


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