Ph.D. Tezi Görüntüleme | |||||||||||||||||||||
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| Summary: Within the scope of the study, it was aimed to determine some physiological and biochemical characteristics of the saplings grown from seeds obtained from differentpopulations of the North Anatolian sessile oak against drought stress, and to reveal both the reactions of the species to drought and the changes in reactions to drought depending on thepopulations. In this context, pre-dawn plant water stress, soil temperature and humidity, photosynthetic pigment analysis, total soluble carbohydrate and proline contents of sessileoak seedlings were determined. In addition, some morphological features were measured in one-year-old sessile oak saplings, and the relationships between the reactions of populationsto drought stress and morphological characteristics were evaluated. As a result of the study, it was determined that there are differences between the populations in terms of bothphysiological and biochemical characteristics and morphological characteristics. On the other hand, it was determined that due to the increase in the stress application period in thesaplings exposed to drought stress, the plant water stress, total carotenoid, proline and total carbohydrate amounts increased, while chlorophyll a, b and total chlorophyll amountsdecreased. Also, in terms of morphological characteristics, variations between populations were revealed and it was determined that there were strong relationships between thephysiological and biochemical responses of the populations to drought stress with the data obtained from dry root percentage, sturdiness index, dry shoot-root ratio and Dickson qualityindex, which are important parameters in seedling quality classification. Key Words: Physiology, Water potential, Proline, Soluble Sugar, Variation | |||||||||||||||||||||