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Pak. J. Bot., 42(1): 247-258, 2010.

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EFFECT OF PRIMING WITH POTASSIUM NITRATE AND DEHUSKING ON SEED GERMINATION OF GLADIOLUS (GLADIOLUS ALATUS)

A. RAMZAN, I.A. HAFIZ*, T. AHMAD AND N.A. ABBASI

Abstract: Gladiolus (Gladiolus alatus), belonging to the family Iridaceae is rated as the most popular flower in the world at commercial scale. The effect of different concentrations of KNO₃ (1, 2, 3, 4, 5 and 0 %) on seed germination percentage, time required for 50% germination and on mean germination time (MGT) was studied under controlled conditions. Best germination rate of 92% was achieved in T₆ (distilled water) followed by 80% in T₁ (1% KNO₃) and 70% in T₂ (2% KNO₃). Minimum time required for 50% germination i.e., 8 days was obtained with T₆ (distilled water) and in the same way shortest mean germination time required by seeds was 15 days in T₆. Bulb gained maximum weight (0.6467 g) and diameter (9.49 mm) in T₃ (3% KNO₃). Likewise, this treatment also resulted in an acquisition of 14 cm seedling length and a positive correlation was found between seedling length and growth parameters of bulb i.e., weight and diameter. In another experiment, effect of dehusking on seed germination was tested. Seed without husk gave the promising outcome of 74% germination while seeds with husk merely acquired 63% germination after 30 days.

Department of Horticulture,  Pir Mehr Ali Shah, Arid Agriculture University Rawalpindi, Pakistan

*Corresponding Author E- mail: decenthafiz60@yahoo.com