alexa EFFECTS OF VARIOUS TREATMENTS ON ECHINACEA PURPUREA L. SEED DORMANCY BREAKING AND GERMINATION


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Research Article

EFFECTS OF VARIOUS TREATMENTS ON ECHINACEA PURPUREA L. SEED DORMANCY BREAKING AND GERMINATION

Esfandiar Fateh*,Nora Malekpourlashkariani and Farzad Gerami
Department of Agronomy and Plant Breeding, Agriculture Faculty, Shahid Chamran University, Ahvaz, Iran
Corresponding Author: Esfandiar Fateh, Tel: +989125668501; Fax: +986113330079;E-mail: [email protected]
Received: 27 June 2012Accepted: 30 June 2012 Published: 02 July 2012
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Abstract

The present study was conducted to evaluate the effect of various treatments including chilling for 2, 5, 9 and 12 weeks, chilling for 12 weeks + %3 H2SO4, H2SO4 for 2, 5 and 10 min, chilling + GA3, GA3 (300 and 600 ppm) as well as %2 KNO3 to breaking of Echinacea seed dormancy and promote its germination and seedling growth at 2011. This experiment design was completely randomized block with three replications. Analysis of variance results showed that various treatments had significant effect on all studied traits at %1 probability level. Also, mean comparison of treatments indicated that the highest germination percentage, germination rate, plumule and radicle length, seedling dry weight and seed vigour obtained as affected by chilling + GA3 and GA3 (600 ppm), while highest value for radicle to plumule ratio observed in seeds that treated by H2SO4 for 2 min. In general, each trait showed alternative response to various treatments. Among different treatments chilling + GA3 and GA3 (600 ppm) had the best effect on breaking of Echinacea seed dormancy and improving of this plant germination and seedling growth. Therefore, our results showed that dormancy in Echinacea seeds might be physiological.

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