Effect of Some Physical Treatments to Overcome Zarin-giyah (Dracocephalum kotschyi Boiss.) Seed Dormancy

Subject Areas : Research On Crop Ecophysiology

MAEDEH BOHLOULI ¹ (Department of Horticultural Science, Faculty of Agriculture, Isfahan (Khorasgan) Branch, Islamic Azad University, Isfahan, Iran)
HOSSEIN ALI ASADI - GHARNEH ² (Department of Horticultural Science, Faculty of Agriculture, Isfahan (Khorasgan) Branch, Islamic Azad University, Isfahan, Iran)
ELHAM CHAVOSHI ³ (Department of Soil Science, Faculty of Agriculture, Isfahan (Khorasgan) Branch, Islamic Azad University, Isfahan, Iran)
NAFISEH ZAMINDAR ⁴ (Department of Food Science and Technology, Faculty of Agriculture, Isfahan (Khorasgan) Branch, Islamic Azad University, Isfahan, Iran)

Received: 2023-06-07 Accepted : 2023-06-07 Published : 2021-01-01

Keywords: Medicinal plant, Keywords: Germination rate, Dormancy-release treatments, Zarin-giyah,

Abstract :

Effect of Some Physical Treatments to Overcome Zarin-giyah (Dracocephalum kotschyi Boiss.) Seed Dormancy Maedeh Bohlouli1, Hossein Ali Asadi - Gharneh1*, Elham Chavoshi2, Nafiseh Zamindar3 Department of Horticultural Science, Faculty of Agriculture, Isfahan (Khorasgan) Branch, Islamic Azad University, Isfahan, Iran Department of Soil Science, Faculty of Agriculture, Isfahan (Khorasgan) Branch, Islamic Azad University, Isfahan, Iran Department of Food Science and Technology, Faculty of Agriculture, Isfahan (Khorasgan) Branch, Islamic Azad University, Isfahan, Iran *Correspondence Author E-mail: [e-mail] Received: 20 September 2020 Accepted: 18 November 2021 Abatract Zarin-giyah (Dracocephalum kotschyi Bioss.) is a medicinal plant and an endemic species in Iran. It is grown and well adapted to high elevations. This plant can be found in some areas such as Tabriz, Yasuj, Mazandaran and Isfahan. Germination in Zarin-giyah seed is irregular and takes a long period of time. This study conducted in 2021-2022, and the potential of Zarin-giyah seed dormancy release was evaluated using eight different treatments which consisted of: scratching with sandpaper, 24 hours of running water + 12 weeks of cooling at 4˚C, 48 hours of running water + 12 weeks of cooling at 4˚C, 60 ˚C hot water for ten minutes, freezing the seeds for 48 hours at -18 ˚C, 24 hours of running water + 48 hours of freezing at -18 ˚C, 24 hours of running water + scratching and the control. The result showed that seedling germination index, root and shoot dry weight, shoot length, mean germination time and germination rate were significant at the 1% probability level. Also, these results showed that using 24 hours of running water and 12 weeks of cooling at 4˚C improved germination traits in Zarin-giyah. Reducing the duration of seed immersion in running water is suggested as a means of achieving better results.