EFFECTS OF THE APPLICATION OF CYTOKININ BIOREGULATORS ON INFLORESCENCE DEVELOPMENT OF TABLE GRAPES

M. Zepeda, A. Hernandez, E. Vidal-Lezama, R. Holguin, D.H. Diaz
Cluster structure and berry size are critical for table grape marketing. Whereas the final developmental changes of the rachis occur from bud opening through to bloom, flower formation occurs solely during the period between bud opening and early shoot growth. Applications of cytokinin formulations at early stages of shoot growth were evaluated on ‘Perlette’ and ‘Flame seedless’ table grape cultivars (Vitis vinifera) for their effects on inflorescence development, namely cluster structure and flower ovary size at bloom. The seedless grapes were treated with the commercial bioregulators Agromil Plus Biozyme, and Burst that contain 2000, 80 and 40 mg•L-1 cytokinins respectively sprayed at 2 ml/L when shoots had 2 to 4 leaves and repeated 10 days later when shoots were 15 to 20 cm long. Cluster length at bloom was not affected by any of the bioregulator treatments. Angle of the second arm of treated clusters was modified compared to the control. The angle with Agromil Plus® application reached 76° to 83°, Burst® and Biozyme® 68° to 72° and the control 67 to 74°. Ovary diameter of flowers at anthesis was 4.0 to 4.9 mm with Agromil Plus® applications, 3.4 to 4.1 mm with the other bioregulators, and 3.4 mm in the untreated control plots. These data indicate that cluster structure can be modified and ovary growth can be increased by cytokinin bioregulators when applied during the early stages of development.
Zepeda, M., Hernandez, A., Vidal-Lezama, E., Holguin, R. and Diaz, D.H. (2006). EFFECTS OF THE APPLICATION OF CYTOKININ BIOREGULATORS ON INFLORESCENCE DEVELOPMENT OF TABLE GRAPES . Acta Hortic. 727, 295-298
DOI: 10.17660/ActaHortic.2006.727.35
https://doi.org/10.17660/ActaHortic.2006.727.35
cytokinins, grapes, inflorescence, ovary, Vitis vinifera, ´Perlette´, ´Flame Seedless´
English

Acta Horticulturae