Sajad Alipour; Ali Tehranifar; Mahmoud Shoor; Leila Samiei; Homayoun Farahmand
Abstract
Fritillaria raddeana Regel is one of the Iranian-native bulbous plants well known for its medicinal and ornamental values. As regards germination and establishment are two key points in order to protect the natural populations of this species, it is important to study about propagation and domestication ...
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Fritillaria raddeana Regel is one of the Iranian-native bulbous plants well known for its medicinal and ornamental values. As regards germination and establishment are two key points in order to protect the natural populations of this species, it is important to study about propagation and domestication of F.raddeana. An experiment was conducted to study the status of seed dormancy to break it in a randomized completely design including 5 priming treatment with 7 replicate in 2015- 2016. Priming treatments were arginine; in concentrations of 5 and 10 mM), gibberellic acid; concentration of 250 and 500 mg per liter, and control (without priming). All events throughout germination process seed was recorded graphically for an image. The results showed that seed priming with arginine and gibberellic acid improved germination properties. Among all treatments, arginine 5 mM has greatest impact on the rate and percentage of germination as far as it increased percentage and rate germination by 1.5 and 2.5 fold in companion with control, respectively. However, there is no significant different between arginine 10 mM and two concentration of gibberellic acid in germination results. The study on the growth of the embryo showed that F.raddeana seeds have after-ripening, so that embryo size is third of its actual size in natural habitat that gradually developed with receiving cold treatment.
M.A. Alizadeh; A.A. Hosienpoor Ghazvini; A.A. Jafari; J. Daneshian
Volume 5, Issue 2 , January 2016, , Pages 223-233
Abstract
In greenhouse experiment, the seed samples of 8 populations of four savory sepecies as: Satureja sahendica, S.bachtiarica , S.khuzistanicaandS.hortensis were treated with cold strafication, after-ripening, physical scarification (sand paper), chemical scarification (Ethylic alcohol 70%) and distilled ...
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In greenhouse experiment, the seed samples of 8 populations of four savory sepecies as: Satureja sahendica, S.bachtiarica , S.khuzistanicaandS.hortensis were treated with cold strafication, after-ripening, physical scarification (sand paper), chemical scarification (Ethylic alcohol 70%) and distilled water (control). The greenhouse experimental design were carried out as completelt randomize design with three replications by condition of 25±5°C and light illumination (10000 lux) on day time and 5-12°C during night in greenhouse of Research Institute of Forest and Range, during 2009-2010. The seed emergence characteristics including: percentage and speed of emergence, length of root and shoot, vigour index, fresh and dry weight were evaluated. Means comparisons were made using Duncan method. Results showed that S.khuzistanica had higer percent and speed of seed emergenation and vigour index than other pecies. The two populations of Khuzistan (S.khuzistanica), and edible savory (S.hortensis) had higher values of percent and speed of emegence and vigour index than other ecotypes. The higher values of seed emergence traits and vigour index of Khuzistan population (S.khuzistanica) were obtained by physical and chemical scarfication (sand-paper and alchol) than other treatments. Therefore, the dormancy of this population was considered as physical dormancy. Seed gemination traits and vigour index of Lorestan population (S.khuzistanica), and Gazvin population (S. sahendica) were improved by cold and after-ripening treatment than other treatments.
