Evaluation of seed dormancy breaking methods in Astragalus parrowianus
Journal Title: International Journal of Farming and Allied Sciences - Year 2015, Vol 4, Issue 5
Abstract
Seed dormancy is the most important limiting factor in domesticating plants.Therefore, a main research priority is to break seed dormancy for the aforementioned purpose. An experiment was performed to study the effects of scarification, gibberellic acid and cold stratification on seed germination of Astragalus parrowianus in Seed Science and Technology Laboratory, Faculty of Agriculture, IAUM, Iran, during 2012. A factorial experiment with a complete randomized design carried out with three replications. Factors included two levels of scarification (with and without scarification), four levels of cold stratification at 4 °C (0, 7, 14 and 21 days), and three levels of gibberellic acid (0, 500 and 1000 ppm). The highest germination percentage was obtained by the interaction between scarification and cold stratification at 7 or 14 days. Although cold stratification can intensify the effect of scarification, it was not effective alone. Applying gibberellic acid had no effect. Based on our results, the seeds were dormant via a water-impermeable seed coat, requiring mechanical scarification to imbibe water and to germinate.
Authors and Affiliations
Khayat Moghadam Mojde, Sadrabadi Haghighi Reza
Keywords
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