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International Journal of Pure & Applied Bioscience (IJPAB)
Year : 2018, Volume : 6, Issue : 3
First page : (548) Last page : (552)
Article doi: : http://dx.doi.org/10.18782/2320-6738

Studies on Influence of Gibberellic acid (GA3) on Growth, Seed Yield and Quality of Zinnia (Zinnia elegans Jacq.)

Surabhi, V. K.¹*, Raikar S. D.² and Channaveerswami A. S.²

¹Department of Seed Science and Technology, University of Agricultural Sciences, GKVK, Bengaluru, India
²Department of Seed Science and Technology, University of Agricultural Sciences, Dharwad, India
*Corresponding Author E-mail: surabhivk1991@gmail.com
Received: 15.05.2018 | Revised: 22.06.2018 | Accepted: 27.06.2018  

 

 ABSTRACT

A field experiment was conducted to study the influence of gibberellic acid (GA3) on growth, seed yield and quality in zinnia (Zinnia elegans Jacq.) The experiment was planned with 14 treatment combinations involving two GA3 concentrations, seven stages of application of GA3 and a common control. The application of GA3 at 200 ppm  recorded significantly higher number of branches per plant (17.41), number of seeds per flower (48.22), seed yield per plant (2.91 g) and per hectare (1.332 q), thousand seed weight   (7.57 g) and germination (85.14 %). Spraying of GA3 at both flower initiation and 50 per cent flowering stages  recorded significantly higher number of branches per plant (18.26), number of seeds per flower (50.13), seed yield per plant (3.36 g) and  per hectare (1.542 q), thousand seed weight (7.73 g) and germination (87.99 %). The interaction effect of GA3 200 ppm and its application at both flower initiation and 50 per cent flowering stages  recorded significantly higher number of branches per plant (18.66), number of seeds per flower (52.86), seed yield per plant (3.46 g) and per hectare (1.583 q), thousand seed weight (7.86 g) and germination (90.66%). The results suggest that interaction effect of GA3 at 200 ppm and its application at both flower initiation and 50 per cent flowering stages resulted in  higher growth, seed yield and quality parameters in zinnia.

Key words: Zinnia elegans, Gibberellic acid, Seed yield and Seed quality.

Full Text : PDF; Journal doi : http://dx.doi.org/10.18782

Cite this article: Surabhi, V.K., Raikar, S.D. and Channaveerswami, A.S., Studies on Influence of Gibberellic acid (GA3) on Growth, Seed Yield and Quality of Zinnia (Zinnia elegans Jacq.), Int. J. Pure App. Biosci.6(3): 548-552 (2018). doi: http://dx.doi.org/10.18782/2320-7051.6738