The evaluation of germination parameters and cardinal temperatures of Plantago ovata

Document Type : Research Paper

Authors

1 Formr M.Sc. Student of Seed Science and Technology, University College of Agriculture & Natural Resources, University of Tehran, Karaj, Iran

2 Professor, Faculty of Agriculture, Ferdowsi University of Mashhad, P.O. Box 91775-1163, Mashhad, Iran

3 Assistant Professor, Department of Horticultural Science and Landscape, College of Agriculture and Natural Resources, University of Tehran

Abstract

This study was conducted to investigate the effects of different temperatures on seed germination of Plantago ovata and also to evaluate cardinal temperatures. Various constant temperatures (5, 10, 15, 20, 25, 30 and 35ºC) were conducted in a completely randomized design with four replications. The germinated seeds were counted every day and the rate of germination percentage, cumulative germination and cardinal temperatures of Plantago ovata seed germination based on two regression models including Intersected-lines Model and Quadratic Polynomial Model were calculated. The effects of temperatures on rate and percentage of germination was significant. The highest germination rates were in 20ºC (R50=0.067). Based on the two regression models, Intersected-lines Model and Quadratic Polynomial Model, the cardinal temperatures (Tbase, Topt and Tmax) of Plantago ovata seeds were: (3.9-4.5), (18.8-21.1) and (33.7-34.1)°C, respectively. With increasing temperature, the more suitable conditions in terms of temperature, is created for Plantago ovata seed germination and germination rate is increased.

Keywords

References

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History

  • Receive Date: 10 February 2015
  • Revise Date: 30 June 2015
  • Accept Date: 03 July 2015
  • Publish Date: 21 May 2016

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