Pak. J. Bot., 48(2): 477-483, 2016.

EFFECT OF GIBBERELLIC ACID ON ENHANCING FLOWERING TIME IN CHRYSANTHEMUM MORIFOLIUM

MUHAMMAD SAJID^1* NOORUL AMIN², HABIB AHMAD¹AND KHALID KHAN³

Abstract: The study was conducted to evaluate the effect of various concentrations of GA₃ on plant height, number of branches, leaves, flowers plant^-1, leaf area, days to flowering, blooming period, flower size and flower fresh weight. There were total six treatments of GA₃ concentrations at 0, 50, 100, 150, 200 and 250 mg L^-1. Data regarding vegetative and flowering attributes indicated that flowering in Chrysanthemum morifolium varied significantly for most of the studied parameters. Application of GA₃at the rate of 250 mg L^-1with plant height (62.0 cm), number of branches (8.65), suckers (8.05), leaves (55.05) plant^-1, leaf area (122.35 cm²), days to flower (110.8 days) and number of flowers (31.9) were significantly different as compared to rest of the treatments and was followed by GA₃ at the rate of 200 mg L^-1 in flower size (5.49 cm) and flower fresh weight (4.01g). Untreated Chrysanthemum plants had least plant height (47.5 cm), number of branches (6.4), suckers (6.75), leaves (39.2) plant^-1, leaf area (96.85 cm²), days to flower (131.05 days), number of flowers (21.91) plant^-1, flower size (4.88 cm) and flower fresh weight (3.44 g). Application of GA₃@ 250 mg L^-1produced flowers earlier (28^th September) than the normal season and extended the flowering season up to 22 days.

Key words: Chrysanthemum flowering, Gibberellic acid, Early flowering.

²Department of Horticulture, The University of Agriculture, Peshawar, Pakistan

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			Updated: 01-04-16
	EFFECT OF GIBBERELLIC ACID ON ENHANCING FLOWERING TIME IN CHRYSANTHEMUM MORIFOLIUM *MUHAMMAD SAJID^1 NOORUL AMIN², HABIB AHMAD¹AND KHALID KHAN³ Abstract:** The study was conducted to evaluate the effect of various concentrations of GA₃ on plant height, number of branches, leaves, flowers plant^-1, leaf area, days to flowering, blooming period, flower size and flower fresh weight. There were total six treatments of GA₃ concentrations at 0, 50, 100, 150, 200 and 250 mg L^-1. Data regarding vegetative and flowering attributes indicated that flowering in Chrysanthemum morifolium varied significantly for most of the studied parameters. Application of GA₃at the rate of 250 mg L^-1with plant height (62.0 cm), number of branches (8.65), suckers (8.05), leaves (55.05) plant^-1, leaf area (122.35 cm²), days to flower (110.8 days) and number of flowers (31.9) were significantly different as compared to rest of the treatments and was followed by GA₃ at the rate of 200 mg L^-1 in flower size (5.49 cm) and flower fresh weight (4.01g). Untreated Chrysanthemum plants had least plant height (47.5 cm), number of branches (6.4), suckers (6.75), leaves (39.2) plant^-1, leaf area (96.85 cm²), days to flower (131.05 days), number of flowers (21.91) plant^-1, flower size (4.88 cm) and flower fresh weight (3.44 g). Application of GA₃@ 250 mg L^-1produced flowers earlier (28^th September) than the normal season and extended the flowering season up to 22 days. Key words: Chrysanthemum flowering, Gibberellic acid, Early flowering. ¹Department of Genetics, Hazara University Mansehra, Pakistan ²Department of Horticulture, The University of Agriculture, Peshawar, Pakistan ³Sawabi Women University Sawabi, Pakistan ^Corresponding author’s email: drsajid_1@yahoo.com*

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