Article,
Seed germination in response to osmosic stress
Journal of Biodiversity and Environmental Sciences (JBES), Vol. 1 (No. 4): p. 1-15 (August 2011)
Abstract
An Attempt was carried out to evaluate seed germination performances of Baraka, Adlib and Nineveh lentil cultivars besides Local Vetch and Local Mungbean cultivar under (0, -0.5, -1 and -1.5 Mpa) osmotic potentials created by dissolving pure NaCl in distilled water. Gradual reductions in osmotic solutions resulted in gradual reduction in all detected parameters. Subsequently, -1.5Mpa revealed the highest reductions in terms of final germination percentage (467.1%), germination rate (1710%), radical length (12829.4%) and Plumule length ( infinity). It also aggravated the adverse effects by increasing the duration required for attaining the peak germination percentage (110.8%), as compared to that of distilled water. Treatments were categorized according to their adverse influence on performance of seed germinations as following: -1.5 Mpa> -1 Mpa> -0.5 Mpa> 0 Mpa. Mungbeans local cultivar seeds revealed the best germination performance, as compared to other pulse crops and their cultivars. Since this cultivar gave the highest germination rate (60.5 seedling.d-1), plumule length (33 mm). In addition to that it significantly reduced days required for peak germination (2.6) and days to emergence commencements (1.3).
