National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
A field experiment was carried out to observe the effect of plant growth regulators on growth and flowering of pansy (Viola x wittrockiana Gams.), a beautiful winter annual suitable for bedding, ground cover and potted plant. Experimental site have subtropical humid climate and sandy loam soil with medium fertility status. Seedlings were planted in raised bed with randomised block design and grown carefully. Plants were treated with foliar application of paclobutrazol, cycocel, ethrel and GA3. Each chemical consists of two different doses making total eight treatments and control. Records were collected on vegetative and flowering parameters. Data were analysed and results were shown on ANOVA table. Observation from the results reveals that individual growth regulator showed partial beneficial effect on all the plant character studied in plains of West Bengal. Efficacy of cycocel to the highest degree on plant height might be due to the varied mode of action when applied in different concentration. Paclobutrazol reduced the height by blocking multiple steps in biosynthesis of gibberellins and steroids. Significant variation in number of primary branches and flower diameter occur with GA3 and it is one of the important growth promoting chemical which helps in cell division and cell elongation. However, from the whole course study it can be concluded that under the West Bengal agro climate, GA3and paclobutrazol cited best in regulating plant phenotypic expression, as paclobutrazol kept plant height short and GA3 increased flower diameter per plant maintaining higher bloom quality.
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