Scion photosynthesis and leaf gas exchange in Vitis vinifera L. cv. Shiraz: Mediation of rootstock effects via xylem sap ABA

Rootstock control of scion response to water stress in grapevine

“…3). This limited difference on the expected performances at scion level makes us to hypothesize the mediation by chemical signaling, and mainly ABA (Soar et al, 2006;Marguerit et al, 2012).…”

“…Rootstocks are known to play a major role in grapevine tolerance to water stress by controlling and adjusting the water supply to shoot transpiration demand (Carbonneau, 1985;Soar et al, 2006;Alsina et al, 2011;Marguerit et al, 2012). This study aimed to characterize the influence of rootstocks genotypes in the adaptive response of scions to water limiting conditions.…”

“…Therefore, in plants that are routinely grafted, such as grapevine (Vitis vinifera L.), rootstock effect on scion performance must be considered in the study of adaptability to stress conditions. Rootstocks provide tolerance to exogenous limiting factors, biotic (e.g., soilborne pests) and abiotic (e.g., salinity, water or oxygen deficit), while influencing the ecophysiological behaviour of the scion and its berry quality (Bavaresco and Lovisolo, 2000;Padgett-Johnson et al, 2000;Soar et al, 2006;Tramontini et al, 2012;de Souza et al, 2009;Ibacache and Sierra, 2009;Rizk-Alla et al, 2011;Marguerit et al, 2012). Stomata are considered direct responsible of optimizing the balance between carbon gain and water loss of the plant (Rogiers et al, 2012), and the patterns of their response, in terms of timing and intensity, are genetically determined (Chaves et al, 2010).…”

Rootstock on vine performance and wine quality of ‘Syrah’ under double pruning management

“…Several studies have shown the negative effects of high vigor on yield and wine grape quality due to impairment on bud fertility (Vasconcelos et al, 2009), light in the fruit zone (Pereira et al, 2006) and on vegetative and reproductive balance (Soar et al, 2006). However, our results showed that high cane vigor up to mean values of pruning weight of 200 g per plant did not affect negatively the yield of Syrah under double pruning management since there was a positive correlation between vegetative vigor and grape production (Figure 1), as also shown by Main et al (2002).…”

“…Nowadays, the grafting technique has also been used to control vigor, yield, wine quality and to increase tolerance to environmental stress (Jackson and Lombard, 1993). The rootstock replaces all the root system of the scion, altering water and mineral absorption, affecting the physiological process and consequently vine vigor and yield (Soar et al, 2006;Souza et al, 2015). Furthermore, the classification of rootstocks as high, moderate or low vigor inductors can change according to scion interaction and edaphoclimatic conditions (Kidman et al, 2013;Renouf et al, 2010).…”