Depth of dormancy and desicction tolerance inAcer trautvetteri Medv. Seeds

Özet: Acer trautvetteri Türkiye ve Kafkasya'da yayılış gösteren doğal yapraklı ağaç türlerinden biridir. Türün tohum fizyolojisi üzerine yapılan bu ilk çalışma göstermiştir ki türün tohumunda fizyolojik dormansi bulunmakta ve dormansinin giderilebilmesi için yaklaşık üç ay katlamaya alınması gerekmektedir. Çimlenme yüzdesi, katlama süresine bağlı olarak önemli oranda artmıştır. Bir, iki ve üç ay soğuk işlemden sonra çimlenme yüzdeleri sırasıyla % 38.67, % 76.00, ve % 96.00 olarak gerçekleşmiştir. Tohum en az % 10 neme kadar güvenle kurutulabilmektedir. Tohumun nem içeriği % 3'e indiğinde bütün tohumlar canlılığını kaybetmiştir. Akçaağaç türleri tohum dormansisinin varlığı ve kurumaya karşı duyarlılık bakımından farklılıklar göstermektedir. Bu araştırma, A. trautvetter/nin tohum dormansisi bulunan ve tohumları kurumaya karşı toleranslı olan Akçaağaç türlerinden biri olduğunu göstermiştir.

Acer trautvetteri Medv.' nin tohumlarında dormansinin derinliği ve kurumaya karşı duyarlılık

Abstract: This first exploratory study on the seed physiology of Acer trautvetteri, a broadleaved tree found in Caucasia and northern Turkey, demonstrated that A. trautvetteri seeds exhibit physiological dormancy and require about 3 months of chilling for complete dormancy loss. Germination percentages significantly increased with the chilling duration and were 38.67%, 76.00%, and 96.00% after 1, 2, and 3 months of chilling, respectively. Moreover, while the seeds can be safely dried to at least 10% moisture content, reducing the moisture content to 3% killed all the seeds. Acer species exhibit different seed characteristics in terms of seed dormancy existence and desiccation sensitivity. This research showed that A. trautvetteri is one of the Acer species the seeds of which have seed dormancy and are desiccation tolerant. '

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Turkish Journal of Agriculture and Forestry-Cover
  • ISSN: 1300-011X
  • Yayın Aralığı: 6
  • Yayıncı: TÜBİTAK