Kuraklık Stresi ve Sonrasında Viburnum Bitkisinin Morfolojik ve Fizyolojik Tepkilerinin Belirlenmesi

In this study, Viburnum tinus L. (Evergreen Viburnum, Feathery Viburnum), an evergreen shrub frequently used in landscaping areas, was examined under uncontrolled glass greenhouse conditions for two years repeatedly to determine their responses to drought stress and subsequent recovery period. Plants were obtained 1 year before the start of the treatment in 1 year old and 2-3 liter pots. In the following year, drought treatment was applied until the first wilt was seen in the plants and irrigation was continued at field capacity in the control group. Recovery studies were terminated after the drought treatment was completed by irrigating the plants to field capacity and keeping them at field capacity for 15 days. Among the morphological parameters, shoot length decreased significantly in the first year of drought treatment. As a result of the recovery treatment, shoot length started to recover and 25% shorter shoot length was measured compared to the control group. This difference was not significant in other treatments. Photosynthesis, one of the physiological parameters, decreased in the two-year treatment compared to the control, but recovered rapidly in the second year as a result of the recovery after the drought treatment. Stomatal conductance showed similar results with photosynthesis in drought treatment. Leaf relative water content decreased compared to the control in both years, and the plant recovered to the same level as the control after the recovery treatment.