Full Length Research Paper

The effect of different treatments on improving seed germination characteristics in medicinal species of Descurainia sophia and Plantago ovata

Tavili Ali*¹, Pouzesh Hossein², Farajolahi Asghar¹, Zare Salman¹ and Zare Chahooki Mohammad Ali¹

¹Department of Arid and Mountainous Regions Reclamation, Faculty of Natural Resources, University of Tehran, P.O. Box 31585-4314, Karaj, Iran.

²Member of Young Researchers Club, Islamic Azad University of Yasouj Uni.Iran.

*Corresponding author. E-mail: atavili@ut.ac.ir.  Tel: +98-261-2223044, +985622950. Fax: +98-261-2249313.

Abbreviations: ABA, Abscisic acid; GR, germination rate; MGT, mean germination time.

Accepted 6 July, 2010

   Abstract

Creating optimal conditions for germination of medicinal plants seed is essential for their cultivation. Therefore, to evaluate the effect of different treatments on seed germination of two medicinal species, Descurainia sophia and Plantago ovata collected in 2009 from Tehran Province, an experiment with a factorial randomized complete block design in 6 treatments with 4 replications was conducted. Treatments included KNO₃ with concentrations of 0.1, 0.2 and 0.3%, acetylsalicylic acid with levels of 50 and 100 mg/l, prechilling (4°C for 10 days), thiourea with levels of 0.1 and 0.2%, boiling water for 5 and 10 min. To compare, distilled water was used as control. Results showed that the effect of different treatments on germination percentage of two medicinal species was significantly different (p < 0.05). It was shown that prechilling was the most effective treatment on seed germination of both species.     

Key words: Descurainia sophia, Plantago ovata, germination, acetylsalicylic acid, prechilling, thiourea and KNO₃.