Regenerative Potential of Elymus Farctus From Rhizome Fragments and Seed

Harris, D and Davy, AJ (1986) Regenerative Potential of Elymus Farctus From Rhizome Fragments and Seed. The Journal of Ecology, 74 (4). pp. 1057-1067. ISSN 1365-2745

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Abstract

(1) Both newly-germinated seedlings and shoots from single-node rhizome fragments of Elymus farctus were able to emerge after experimental burial with sand at a depth of 127 mm, but not from 178 mm. (2) Multi-node fragments had a greater probability of emergence than single-node ones at any depth, and also could emerge from greater depths. (3) Inhibition between buds on multi-node fragments led to reserves being concentrated into a single dominant shoot. Distal buds were more likely to become dominant than proximal buds. (4) Nodes of rhizomes taken from the dunes at monthly intervals showed seasonal variation in their ability to produce roots and shoots under controlled conditions. This regenerative ability was inversely related to the growth of the parent plants at the time of sampling, and could be increased by supplying exogenous nitrogen as nitrate. Seasonal patterns were still apparent, however, and concentration of total water-soluble carbohydrate was implicated as a further limiting factor. (5) Multi-node fragments are more flexible in their response to burial, because the likelihood of viable shoot production is increased and buds and resources are conserved against the possibility of further disturbance, whereas seed germination is an all-or-nothing gamble.

Item Type: Article
Faculty \ School: Faculty of Science > School of Biological Sciences
University of East Anglia > Faculty of Science > Research Centres > Centre for Ecology, Evolution and Conservation
University of East Anglia > Faculty of Science > Research Groups > Organisms and the Environment
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Depositing User: Deborah Clemitshaw
Date Deposited: 13 Sep 2011 12:30
Last Modified: 25 Jul 2018 08:22
URI: https://ueaeprints.uea.ac.uk/id/eprint/34776
DOI: 10.2307/2260233

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