ISHS Acta Horticulturae 785: International Symposium on Grape Production and Processing
EFFECT OF CYTOKININS AND BRASSINOSTEROID WITH GIBBERELLIC ACID ON YIELD AND QUALITY OF THOMPSON SEEDLESS GRAPES |
| Authors: | A.J. Warusavitharana, T.B. Tambe, D.B. Kshirsagar |
| Abstract:
The investigation was undertaken with a view to study the effect of cytokinins and brassinosteroid with GA3 for yield and quality attributes and to standardize the application of these plant growth regulators at AICRP on grapes, MPKV, Rahuri during 2004–2005. The experiment was laid out in Randomized Block Design (RBD) with 3 replications and 10 treatments. After October pruning vines and bunches at specific stage of development were treated with respective plant growth regulators as per the treatments, i.e., GA3, brassinosteroid, CPPU, and benzyladenine. Application of GA3 at 10 ppm at pre-bloom stage, 15 ppm at initiation of flowering, 25 ppm at 3 to 4 mm berry diameter stage in combination with I ppm brassinosteroid, benzyladenine at 10 ppm twice at 4 leaf and berry setting stage, respectively and last application of GA3 at 25 ppm at 7 to 8 mm berry diameter stage was found better for maximum berry diameter (19.60 mm), berry length (21.58 mm), berry weight (3.36 g), number of berries per bunch (131.78), number of bunches per vine (15.41), bunch weight (447.85 g) and yield (6.79 kg/vine, 15.09 MT/ha) with attractive grayish yellow colour of berries. It was also given considerable amount of TSS (22.41 °B), lowest acidity (0.53%), highest TSS: acidity ratio (44.31) and minimum days to harvest (132 days) were recorded in vines under control. It indicated that the application of GA3 in combination with brassinosteroid and BA was found effective for cell elongation and cell division, which lead to increase berry size, yield and quality of Thompson Seedless grapes. | |
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