ywords: Acidic Chemicals, Alkaline Ash Solution, Azarole, Common Hawthorn, Seed Dormancy. Crataegus monogyna (Jac.) ve Crataegus azarolus var. pontica ((K. Koch) K. I. Chr) Tohumlarının Morfolojilerinin ve Ön İşlemlerin Tohumlarının Çimlenmesi Üzerin

Çalışmanın amacı: Bu çalışma yemişen (Crataegus monogyna Jac.) ve müzmüldek (Crataegus azarolus var. pontica (K. Koch.) K.I. Chr) tohumlarının morfolojilerini ve ön işlemlerin tohumların çimlenmesi üzerindeki etkilerini belirlemek amacıyla yapılmıştır. Materyal ve yöntem: Yemişen ve müzmüldek olgun meyveleri, Artvin ilinde (Türkiye) Hatila Vadisi ve Yusufeli Pamukçular köyünde yetişen ağaçlardan Eylül 2016'da toplanmıştır. Tohumlar, farklı sürelerde kül çözeltisinde bekletme, sülfürik asit hidrojen peroksit ve etanol ile kimyasal aşındırma ve kül çözeltisinde bekletme ile sülfürik asitte kimysasal aşındırma ön işlemlerinin kombinasyonlarına tabi tutulmuştur. Tohumlar, dört tekrarlı tesadüfi tam blok deneme desenine göre ekilmiştir. Temel sonuçlar: Müzmüldek tohumlarının çimlenme yüzdesi (% 37.31) yemişen tohumlarının çimlenme yüzdesinden (% 16.53) daha yüksektir. Kül çözeltisinde bekletme, yemişen tohumlarının çimlenmesini etkilememiş, ancak müzmüldek tohumlarının çimlenmesinde önemli (p

Determination of Seed Morphologies and Effect of Pretreatments on Germination of Crataegus monogyna (Jac.) and Crataegus azarolus var. pontica (K. Koch) K. I. Chr Seeds

Aim of the study: This study was conducted to determine seed morphologies and the effects ofpretreatments on germination of common hawthorn (Crataegus monogyna Jac.) and azarole (Crataegusazarolus var. pontica (K. Koch.) K. I. Chr) seeds.Material and methods: Ripe fruits of the common hawthorn and azarole seeds were collected fromtrees growing in Hatila Valley and Pamukcular Village in September 2016 in Artvin, Turkey. The seedswere subjected to varying durations of ash solution, sulfuric acid, hydrogen peroxide, ethanol andcombinations of ash solution and sulfuric acid pretreatments. The seeds were sown according to arandomized complete block design with four replications.Main results: Germination of azarole seeds (37.31%) was higher than that of common hawthorn seeds(16.53%). The ash solution pretreatments did not affect the germination of the common hawthorn seeds.Hovewer, it was found to be more effective (p

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