الفهرس | Only 14 pages are availabe for public view |
Abstract This study includes three parts, the first part is ecological studies dealing with the physiological setting of the concerned species, the second part deals with their eco-physiological responses , while the third part aimed at the dissolving germination constraints of the plants under study by applying some physical and chemical treatments. The first part includes the natural vegetation in the sites, where each of the studied plants was analyzed to determine the density , relative density , frequency , relative frequency, cover, relative cover, abundance, relative abundance and importance value of the concerned plants; Balanites aegyptiaca, Capparis decidua and Delonix elata and their relations to other associated species. In the second part, light was thrown on different physiological processes of the species under study. These physiological processes, including seasonal variations in mineral ion contents, total available carbohydrates, proteins and free proline content were concerned. In the third part germination experiments were conducted to study the effect of sulfuric acid, hydrogen peroxide, constant and alternating temperatures on the germination of the studied species from the South Eastern corner of Egypt (some vallies in Gebel Elba). |