The role of polystimulin hormone application and stratification temperature to break the dormancy and improve seed germination for Abies nordmanniana (Stev.) Spach
Abies nordmanniana seedlots, selected from provenances at various altitudes, were investigated. Cutting test showed that the filled seed percentage was relatively high among seedlots originated from the seed-stands of Artvin district in Turkey. Filled seeds percentage varied from 70% to 87% in the four seedlots. The seed of A. nordmanniana from the lower altitude (Ortaköy seedlot, 1600 m asl) showed a greater response to stratification treatment to overcome dormancy than did other seedlots from higher altitudes (Meydancık seedlot, 1950 m; Yayla and Veliköy seedlots, 1800 m). There were significant differences in germination among pre-treatments, seedlots and stratification temperatures. Polystimulin hormones had a large effect on enhancing the germination of all seedlots. Twenty-three days of cold-moist stratification in sand increased the percentage germination and germination energy. Stratification at 9°C was more effective than stratification at 4°C. A combination of polystimulin pre-treatment with 23 days of stratification gave the best results in terms of the percentage germination and germination energy. Germination was obtained in 87% of filled seeds, which is the highest ratio yet obtained for A. nordmanniana.
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Document Type: Research Article
Publication date: July 1, 2008
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