Volume 2, Issue 2 ((Autumn & Winter) 2016)
Iranian J. Seed Res. 2016, 2(2): 137-147 |
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Agroecology, Faculty of Agriculture, Birjand University, Birjand, Iran , Zalipoor2014@yahoo.com
Abstract: (31654 Views)
In order to determinate the cardinal temperatures and investigate the effect of temperature on seed germination and seedling growth of Securigera securidaca, a study was conducted in a completely randomized design with 8 temperature treatments (5, 10, 15, 20, 25, 30, 35 and 40oC) and four replications in research laboratory of faculty of agriculture at the Birjand University in 2013. A two-segmented linear regression model was fitted between germination rate and temperatures to determine cardinal temperatures for germination. Cardinal (minimum, optimum and maximum) temperatures of germination were determined as -1, 22.5 and 40.2oC respectively. Maximum rate and percentage of germination obtained in the range of 20-25oC. Maximum of radicle length and dry weight, maximum of caulicle length and dry weight and maximum of vigor seedling were obtained in 20oC,10-20oC and 5-30oC respectively. Maximum and minimum germination uniformity (GU) was obtained in 25 and 5oC.
Keywords: Seedling vigor, Germination percentage, Two-Segmented Linear Regression, Germination uniformity
Type of Study: Research |
Subject:
Seed Physiology
Received: 2014/09/9 | Revised: 2017/12/23 | Accepted: 2015/04/26 | ePublished: 2016/03/16
Received: 2014/09/9 | Revised: 2017/12/23 | Accepted: 2015/04/26 | ePublished: 2016/03/16
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