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Evaluation of germination characteristics and determination of cardinal temperatures of poppy (Papaver somniferum) seed | ||
| علوم و فناوری بذر ایران | ||
| Article 18, Volume 6, Issue 2 - Serial Number 12, November 2017, Pages 229-239 PDF (843.33 K) | ||
| Document Type: Original Article | ||
| DOI: 10.22034/ijsst.2018.116771 | ||
| Authors | ||
| V. Amiri Monfared1; A. Hashemi2; A. Mamedi3; R. Tavakkol Afshari* 4 | ||
| 1M.Sc of Seed Science and Technology, College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran. | ||
| 2Ph.D. Student in Seed Science and Technology/ Department of Agronomy and Plant Breeding, University College of Agriculture & Natural Resources, University of Tehran, Karaj, Iran | ||
| 3Ph.D. Student in Seed Science and Technology/ Department of Agronomy and Plant Breeding, University College of Agriculture & Natural Resources, University of Tehran, Karaj, Karaj, Iran. | ||
| 4Professor, Department of Agrotechnology, Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad, Iran. | ||
| Abstract | ||
| The aim of this study was to quantify the response of germination rate to temperature and to find cardinal temperatures required for different germination percentiles in Papaver somniferum. Four models of non-linear regression [Quadratic, Segmented, Beta and Dent-like] were evaluated to describe the relationships between germination rate and temperature of P. somniferum over 7 constant temperatures (3, 5, 10, 15, 20, 25 and 30 ˚C). Different statistical indices [Root Mean Squares of Error (RMSE) and coefficient of determination (R2)] were used to compare models performance. The Dent-like was found to be the best model to predict germination rate (RMSE=000.35, R2=0.87). The base, sub optimum, supra optimum and the ceiling temperatures for P.somniferum seed germination were estimated 3, 7, 20 and 31˚C, respectively. The cardinal temperatures depended on the model used for their estimation. Overall, Dent-like was better suited than the other models to estimate the cardinal temperatures for germination of P. somniferum seed. The highest germination percentage (72) and germination rate (0.86) was observed in 10 and 15 ˚C, respectively. | ||
| Keywords | ||
| Seed germination; Base temperature; Optimum temperature; Ceiling temperature | ||
| References | ||
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