Fotoperiyot, Potasyum Nitrat ve Giberellik Asidin Lavanta (Lavandula angustifolia) Tohumlarında Dormansinin Kırılması ve Çimlenme Üzerine Etkisi

Yıl 2025, Cilt: 14 Sayı: 2, 251 - 260, 29.12.2025

Ahmet Cantürk , Şevket Metin Kara

https://doi.org/10.29278/azd.1744517

Öz

Amaç: Bu çalışmanın amacı, fotoperiyot, gibberellik asit (GA3) ve potasyum nitratın (KNO3) lavanta (Lavandula angustifolia) tohumlarında dormansinin kırılması ve çimlenme parametreleri üzerindeki etkilerini araştırmaktır.
Materyal ve Yöntem: Lavanta tohumlarının farklı fotoperiyot koşulları (16/8 saat aydınlık/karanlık ve 24 saat karanlık) ile GA3 (0, 125, 250, 375 ve 500 ppm) ve KNO3 (0, 1000, 2000, 3000 ve 4000 ppm) uygulamalarına karşı çimlenme tepkileri kontrollü koşullar altında belirlenmiştir. Çimlenme hızı, çimlenme potansiyeli ve ortalama çimlenme süresi çimlenme parametreleri olarak değerlendirilmiştir
Bulgular: Fotoperiyot ve GA3 incelenen tüm çimlenme parametrelerini önemli ölçüde etkilemiştir. 16/8 saat aydınlık/karanlık fotoperiyot koşullarında inkübe edilen lavanta tohumlarında çimlenme hızı %88.4 ve çimlenme potansiyeli %20.0 artarken, ortalama çimlenme süresi karanlıkta inkübe edilen tohumlara kıyasla %16.2 kısalmıştır. En etkili GA3 dozunda (375 ppm) çimlenme hızı ve çimlenme potansiyeli sırasıyla %54.2 ve %31.3 artmış, ortalama çimlenme süresi %29.3 kısalmıştır. KNO3'ün etkisi sadece çimlenme potansiyeli için önemli çıkmış ve 3000 ppm dozunda %12.3 artmıştır. GA3'ün KNO₃ ve ışıkla birlikte uygulanması çimlenme hızı ve potansiyelini daha da artırmıştır.
Sonuç: Sonuç olarak, bu bulgular ışığında lavanta tohumlarının çimlenmesini önemli ölçüde uyardığını, 16/8 saat aydınlık/karanlık fotoperiyot koşullarında kombine 375 ppm GA3 ve 3000 ppm KNO₃ uygulamasının lavanta tohumlarında dormansinin kırılması ve çimlenmenin artırılmasında etkili bir yöntem olduğunu göstermektedir.

Anahtar Kelimeler

GA3 , KNO3 , Çimlenme parametreleri , Tohum dormansisi

Effect of Photoperiod, Potassium Nitrate and Gibberellic Acid on Dormancy Breaking and Germination of Lavender (Lavandula angustifolia) Seeds

Öz

Objective: The objective of this study was to investigate the effects of photoperiod, gibberellic acid (GA3) and potassium nitrate (KNO3) on dormancy breaking and germination parameters in lavender (Lavandula angustifolia) seeds.
Materials and Methods: The germination responses of lavender seeds to different photoperiod conditions (16/8 h light/dark and 24 h dark), GA3 (0, 125, 250, 375 and 500 ppm) and KNO3 (0, 1000, 2000, 3000 and 4000 ppm) treatments were determined under controlled conditions. Germination speed, germination potential, and mean germination time were evaluated as germination parameters.
Results: The photoperiod and GA3 significantly affected all germination parameters studied. Lavender seeds that were incubated under a 16/8 h light/dark photoperiodic condition had an 88.4% increase in germination speed and a 20.0% increase in germination potential, while mean germination time was 16.2% shorter compared to the seeds that were incubated in the dark. The most effective dose of GA3 was 375 ppm, which increased the speed and potential of germination by 54.2% and 31.3%, respectively, while reducing the mean germination time by 29.3%. KNO₃ only had a significant effect on germination potential, which increased by 12.3% at a concentration of 3.000 ppm. The combined application of GA3 with light and KNO₃ further increased the speed and potential of germination.
Conclusion: In conclusion, these results suggest that light significantly stimulates lavender seed germination. The combined application of 375 ppm GA3 with 3000 ppm KNO3 in a 16/8 h light/dark photoperiod is an effective treatment for breaking dormancy and increasing germination.

Anahtar Kelimeler

GA3 , germinattion parameters , KNO3 , seed dormancy

Kaynakça

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