Photosynthesis, Biochemical and Yield Performance of Grapevine Hybrids in Two Rootstock and Trellis Height

The interaction between variety, rootstock, and trellis height is important for grapevine management, mainly producing new varieties of grapes juice wine in wine-growing regions with high production potential. Then, this study aimed to evaluate the rootstocks influence on photosynthesis, biochemical, yield performance hybrids. experiment was carried out a randomized block design using two factors, (‘IAC 766’ ‘106-8 Mgt’) (until 1.6 2.0 m), evaluated hybrids (IAC 138-22 ‘Maximo’ ‘BRS Violeta’). During flowering, it photosynthesis biochemical performance, this, gaseous exchanges were measured open system equipment CO2 analyzer water vapor by infrared radiation, being net assimilation rate CO2, stomatal conductance, transpiration rate, internal concentration, use efficiency, carboxylation efficiency (Rubisco), flux density photosynthetically active photons. At stages flowering ripening berries antioxidant enzymes (peroxidase (POD), superoxide dismutase (SOD), catalase (CAT)), total soluble proteins, chlorophylls, SPAD. rootstock heigh influenced varieties’ performance. In conclusion under subtropical conditions, better observed when both cultivars grafted ‘IAC rootstock. Maximo’ trained until increasing grape efficiency. addition, variety more productive than Violeta’.