This study was carried out to determine the root development of black mulberry hardwood cuttings kept in light and dark conditions. The experiment was carried out in the polyethylene greenhouse of Tokat Gaziosmanpaşa University Research and Application Center, in 2021. As material, hardwood cuttings prepared from one-year-old branches of black mulberry trees were used. The cuttings were divided into 3 different groups and planted in rooting beds containing perlite with bottom heating (22±2 °C). First group of cuttings were planted into beds as soon as taken from tree (control), the second group of cuttings were plantend after the cuttings were kept under daylight conditions for 5 days (in the open) and third group cuttings were planted after the cuttings were kept in the dark conditions (in the dark) for 5 days in both conditions soaked in water. All cuttings were dipped in 6000 ppm IBA (indole-3-butyric acid) hormone for 5 seconds just before planting. The experiment is with 3 replications and there are 15 cuttings in each replication. After keeping 90 days in the rooting environment, the cuttings were removed; root number (root/stem), root length (cm), root diameter (mm), decay rate (%), rooting rate (%) and callus formation rate (%) parameters were investigated. As a result of the study, there was no statistical difference between the different conditions in the investigated parameters. The data obtained varied between the following values; rooting rate between 68.89% - 93.33%, decay rate between 24.4% - 55.5%, callus formation rate between 68.8% - 88.8%, number of roots 8.8 - 13.5 root/stem, root length 6.5 - 7.4 cm and root diameter between 1.02 - 1.16 mm.

In the study; fruit skin color parameters, fruit flesh firmness and total soluable solid (TSS) ratios, as well as total acidity, total phenolic substance, total monomeric anth°Cyanin amounts and total antioxidant capacity were determined. After the fruits were harvested, they were immersed in three different doses (0-2-4%) of calcium chloride (CaCl2) solution for 5 minutes. The fruits removed from the solution were kept to dry. The fruits were stored for 14 days in a cold store with a temperature of 1-2°C and a relative humidity of 90±5%. Before the storage and on the 7th and 14th days of storage, the fruits samples were taken and kept on the shelves in the rooms with a temperature of 21±1°C and a relative humidity of 60±5%for 3 days. Measurements and analyses of fruit quality parameters were made in the samples taken from the fruits that were kept on the shelf for three days. As a result of the study, it was determined that 4%CaCl2 application was effective in maintaining fruit flesh firmness. In fruits kept on the shelf for 3 days after 14 days of storage, SSC of 4%CaCl2 treatment was found to be higher than the control treatment. Compared to the control, 4%CaCl2 caused a significant increase in the total phenol content. The highest total monomeric anth°Cyanin content and total antioxidant capacity was determined in the control treatment. While there were no significant changes in L* values between treatments, a* and b* values were found to be higher in 2%CaCl2 treatment. In the light of the data obtained, it was concluded that 4%CaCl2 application had a positive effect on the shelf life of strawberry fruits.

Bu çalışma 2021 yılında Tokat Gaziosmanpaşa Üniversitesi Tarımsal Uygulama ve Araştırma Merkez Müdürlüğü’ne ait köklendirme serasında yürütülmüştür. Çalışmada, farklı karanlık koşulları altında 6000 ppm indol-3-bütirik asit (IBA) ve 2000 ppm kafeik asit (KA) uygulamalarının karadut odun çeliklerinin köklenmesi üzerine etkisi araştırılmıştır. Deneme, tesadüf parselleri deneme desenine göre faktöriyel düzende 3 tekerrürlü olarak kurulmuştur. Materyal olarak müdürlük bünyesinde bulunan damızlık karadut ağaçlarının bir yaşlı dallarından hazırlanan odun çelikleri kullanılmıştır. Odun çelikleri 2021 yılının şubat ayında alınarak alttan ısıtmalı (20±2°C) perlit ortamına dikilmiştir. Çalışmada kullanılan çelikler 3 gruba ayrılarak birinci gruptaki çeliklerin üzeri dikimden sonra siyah malç örtüsü ile kapatılmış (Dikim Sonrası Karanlık=DSK); ikinci gruptaki çelikler dikimden önce 5 gün karanlık koşulda bekletildikten sonra köklendirme ortamına dikilmiş (Dikim Öncesi Karanlık=DÖK); üçüncü gruptaki çeliklere ise herhangi bir karanlık uygulaması yapılmamıştır (Standart). Her bir karanlık uygulamasındaki çeliklere 6000 ppm IBA ve 2000 ppm KA tek başına veya birlikte uygulanmıştır. Köklenme ortamında 90 gün bekletilen çelikler bu süre sonunda sökülerek; köklenme oranı, kallus oluşum oranı, çürüme oranı, kök sayısı, kök uzunluğu ve kök çapı değerleri kaydedilmiştir. Çalışma sonucunda köklenme oranı %2.2 ile %77.8 arasında değişmiştir. En yüksek köklenme oranına DÖK koşulundaki çeliklere 6000 ppm IBA ve 6000 ppm IBA + 2000 ppm KA uygulamaları sonucunda ulaşılmıştır. Kallus oluşturan çeliklerin oranı %64.4 ile %93.3, kök sayısı 1.5 ile14.4 kök/çelik, kök uzunluğu 3.6 ile10.8 cm ve kök çapı 0.86 ile1.53 mm arasında değişim göstermiştir. Elde edilen veriler, DÖK koşulunda bekletilen çeliklere IBA'nın tek başına ya da KA ile birlikte uygulanmasının karadutun köklenmesine olumlu etki yaptığını göstermiştir.