Comparison of impact induced by different priming techniques on germination and plant development in lisianthus (Eustoma grandiflorum)

摘要

Lisianthus ( Eustoma grandiflorum ) belongs to family Gentianaceae is becoming one of the most highly ranked cut flowers in international market. Lisianthus seeds exhibited cold-related dormancy and slow germination rate. Seed priming techniques have been utilized to increase germination attributes and improve germination uniformity. The present study was conducted to enhance germination uniformity and plant development in Lisianthus by using different priming techniques. The effect of different concentrations of gibberellic acid (250, 500 and 1000 ppm GA 3 ), potassium nitrate (0.1, 0.2 and 0.3% KNO 3 ), hydro priming (DW, CDW, WDW) and control was examined on germination and other physiological parameters. Complete Randomized Design (CRD) was used for nine treatments with five replications. Plants treated with GA 3 of concenteration 1000 ppm had a positive impact on all parameters ( mean germination time, germination index, plant height, number of leaves, stem length, number of flowers, size of flower fresh and dry plant weight). It seems that GA 3 and KNO 3 can be replaced partly to improve seed germination of lisianthus seeds. Therefore, it is concluded that for best germination and plant growth parameters of Lisianthus seeds, harmonal (GA 3 ) and halo priming (KNO 3 ) can be used.