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An Apparent Induction of Secondary Dormancy in Eucalyptus globulus Labill Seeds

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Nair, TS (2006) An Apparent Induction of Secondary Dormancy in Eucalyptus globulus Labill Seeds. PhD thesis, University of Tasmania.

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Abstract

Eucalyptus globulus is a major plantation forestry species in southern Australia.
Commercial E. globulus seedlots have high viability (95%) and uniform
germination, which is completed within 5-6 days. However commercial nurseries
have reported delays in germination with seedling emergence spread over five to
ten weeks. According to growers and seed suppliers the problem is not restricted
to particular seedlots and occurs in most nurseries. Observations have suggested
that a brief period of desiccation or high temperature between sowing and
germination may lead to the delays, but no clear cause has been established.
Further, there is nothing in the literature to indicate either cause or possible
management strategies. According to the ISTA guidelines the germination period
of E. globulus is 5-14 days under laboratory conditions and in the field,
germination should occur before 26 days. The aim of the present project was to
establish the factors responsible for this apparent induction of previously
unreported secondary dormancy in E. globulus seed and to provide a basis for
commercial management of the problem.

Item Type: Thesis (PhD)
Date Deposited: 01 Oct 2008 03:47
Last Modified: 11 Mar 2016 05:54
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