Journal
SEED SCIENCE AND TECHNOLOGY
Volume 37, Issue 3, Pages 758-764Publisher
ISTA-INT SEED TESTING ASSOC
DOI: 10.15258/sst.2009.37.3.22
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Funding
- Provincia di Cagliari - Assessorato Tutela Ambiente
- Ente Foreste della Sardegna
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Rhamnus persicifolia is an endemic small tree or shrub belonging to the R. cathartica group. It grows along mountainous waterways of the Central-Eastern Sardinia (Italy). The purpose of this study was to report the effects of temperature, light and pre-chilling on germination of R. persicifolia seeds. The applied treatments included a ran-e of constant temperatures (5-30 degrees C) and two alternating temperature regimes (15/5 and 25/10 degrees C), with two photoperiods (8 h light / day and darkness). In addition, the most effective germination temperature (25 degrees C) was repeated including a pre-chilling period (5 degrees C for 3 months). R. persicifolia reached maximum germination percentages (> 70%) at warm temperatures (>= 20 degrees C). with no differences between constant and alternating regimes and no response to light. While the pre-chilling period did not increase germination percentage it had a positive effect on germination rate, reducing T-50 by more than 50%. These Studies provide new information on the seed biology of this endemic species and enable ex situ seed germination, which may prove useful for habitat restoration activities.
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