Tohum Çimlenme Hızının Ekolojik Önemi ve Farklı Çimlenme Hızı Hesaplama Yöntemlerinin Karşılaştırılması

Abstract

The geographical location of the Mediterranean basin, climate type and variability within itself, human impact, fire existing as a common factor and rich plant diversity makes the region an ideal area for plant ecology studies.In this thesis study, a database containing germination rate data was created by using the findings and data of the studies conducted in the Mediterranean basin. Using this database, how germination rate is affected by heat shock and smoke applications and the incubation temperature was examined. The effects of plant growth, resprouting ability and family on germination rate were also investigated.At the end of the study, it was found that growth form is an important determinant of germination rate in Mediterranean Basin plants and that annual plants germinate faster than perennial herb and woody species. When growth form investigated with resprouting ability, no effect of heat shock on germination rate was found, but different tendencies were observed in different families. In woody species and non-resprouter species, different germination rate values were obtained after different smoke concentrations and different incubation temperatures. As the incubation temperature changes, germination rate changed in some families. When germination rate estimates evaluated, it was found that MGT ( mean germination time) estimate gives higher mean values than T50 ( time to germination of half of the highest number of seeds germinated during the experiment) and that T50 explained better in the variance in data. This study is important because it contains the first germination rate database for the Mediterranean basin. The findings of the study revealed that the environmental factors shaping the germination rate in plants and the extent to which plant functional groups can explain the differences between species in the germination rate. In addition, as a result of the thesis, two different germination rate estimates were compared with the existing data set, which contributed to the literature on which could be more useful. This thesis study also showed that germination rate is an important component of post-fire germination dynamics in the Mediterranean basin.