**3. Conclusions**

The role of the different hormones during grapevine ripening seems to be complex. Currently, some technical difficulties limit a better understanding of physiological processes occurring during grapevine berry development and the hormonal control. There is no availability of a mutant collection of *V*. *vinifera* that could support the study of hormonal signaling or biosynthetic pathways to clearly understand hormone control of berry formation and maturity allowing to establish direct cause-effect relationships. Transgenesis in grapevine is not an easygoing procedure, and the generation of overexpressing or silencing lines in genes of interest is a difficult task. At the moment, correlations between hormone levels and gene expression at different phases of berry development are the best approach to unravel hormonal regulation of berry development. So far, a successful approach has been exogenous treatments with hormones, which have allowed to suggest conclusions and discern the complex interaction network. In addition, global analyses including genomics, transcriptomics, and proteomics have improved our knowledge about this process. It is expected that the progress of new technologies could help to overcome technical limitations and give more insight into control of berry development mediated by plant hormones.
