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Pakistan Journal of Biological Sciences

Year: 2004 | Volume: 7 | Issue: 2 | Page No.: 182-186
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Authors

Cuneyt Cirak

Ali Kemal Ayan

Kudret Kevseroglu

Keywords

Research Article

The Effects of Light and Some Presoaking Treatments on Germination Rate of St. John’s Worth (Hypericum perforatum L.) Seeds

Cuneyt Cirak, Ali Kemal Ayan and Kudret Kevseroglu
Light was found to be the most important factor affecting its seed germination. Under light conditions, soaking the seed for 30 min. in 50 ppm GA and 40°C hot water enhanced germination rate significantly. Under dark conditions, the seeds treated with KNO were the only ones germinating effectively. 3 The results suggest that Hypericum perforatum seeds exhibit both exogenous and endogenous dormancy. To over come former originating from a chemical inhibitor in exudate from capsule, washing with water, 40°C hot water and 50 ppm GA treatments; to over come later related with absence of light, 0.01 mol KNO3 treatment were recommended.
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