Seed germination of three provenances of arbutus Andrachne L. in response to different pretreatments, temperature and light
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CitationTİLKİ, F., GÜNER, S., Seed Germination of Three Provenances of Arbutus andrachne L. in Response to Different Pretreatments, Temperature and Light, "Propogation of Ornamental Plants ", 7, 175-179, (2007)
Seeds of Arbutus andrachne possess a physiological dormancy that prevents synchronized and rapid germina tion. The seeds were subjected to different pretreatments involving hot water, concentrated sulphuric acid, gibberellic acid and cold-moist stratification to break the dormancy. To determine the effects of temperature and light on seed germination they were treated with gibberellic acid and incubated at 20 and 24°C in light or dark. Gennination ability of seeds from different sources was also compared to determine the effect of source environment. Compared with the control, sulphuıic acid treatments were not effective in enhancing germination of A. andrachne seeds and hot water scarification was also not successful. When averaged over ali provenances, cold moist-stratification at 4°C for 8 to 12 weeks or treatment of seeds with 200-800 mg 1-1 gibberellic acid (GA3) greatly increased germination percentage at 24°C in dark. Also, there was a remark able effect of provenance on the gennination percentage. Seeds treated with 400 mg J- 1 GA3 did not exhibit an obligate light requirement during germination, but germination rate was higher under light condition although temperature (20 or 24°C) did not affect germination performance.