Volume 2, Issue 2 ((Autumn & Winter) 2016)                   Iranian J. Seed Res. 2016, 2(2): 137-147 | Back to browse issues page


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Alipoor Z, Mahmodi S. Determination of Cardinal Temperatures and Response of Securigera securidaca to Different Temperatures of Germination . Iranian J. Seed Res.. 2016; 2 (2) :137-147
URL: http://yujs.yu.ac.ir/jisr/article-1-49-en.html
Agroecology, Faculty of Agriculture, Birjand University, Birjand, Iran , Zalipoor2014@yahoo.com
Abstract:   (20433 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. 

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Type of Study: Research | Subject: Seed Physiology
Received: 2014/09/9 | Accepted: 2015/04/26

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