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Provenance and seed mass determines the seed germination success of Eucalyptus ovata (Myrtaceae)
journal contribution
posted on 2023-05-18, 06:58 authored by Peter HarrisonPeter Harrison, Tanya BaileyTanya Bailey, Rene VaillancourtRene Vaillancourt, Bradley PottsBradley PottsEucalyptus ovata is a medium size tree which grows from near sea level to sub-alpine regions in the south-east of Australia and is increasingly being used for woodland restoration in Tasmania. Given the wide altitudinal range of the species, we investigated whether a wet, cold stratification treatment enhanced seed germination of high altitude provenances. Open-pollinated seeds were harvested from five trees from a high and low altitude provenance within each of the five geographic regions from across E. ovata's distribution in Tasmania. Chilling imbibed seeds at 5°C for three weeks had no effect on the overall proportion of viable seeds which germinated. There were, however, significant provenance differences in seed weight and the germination traits (i.e. proportion of viable seeds, germination rate and overall proportion germinated) which were variably linked to differences in altitude. Seed viability tended to increase with seed mass and provenance-level correlations amongst germination traits suggested that seeds from different provenances differed in germination vigour. These results indicate that provenance rather than a pre-treatment determines germination success of E. ovata seed, but these provenance differences are not predictable and that selection of heavier seeds may increase germination success in the nursery and in direct seeding applications.
History
Publication title
Seed Science and TechnologyVolume
42Pagination
466-472ISSN
0251-0952Department/School
School of Natural SciencesPublisher
International Seed Testing AssociationPlace of publication
Reckenholz Po Box 412, Zurich, Switzerland, Ch-8046Rights statement
Copyright 2014 The International Seed Testing AssociationRepository Status
- Restricted