Regulation of photosynthesis during water deficit in three grapevine cultivars

The main limitation imposed by water deficit on photosynthesis is a decreased CO2 diffusion to the chloroplast mediated by stomatal closure. However, a decrease in mesophyll conductance, electron transport rate through photosystem II or a relative increase in photorespiration have also been observed in different studies. The degree of importance of these processes to photosynthesis limitation under water deficit may be different depending on its intensity and on the cultivar-specific response.

Response of Chardonnay B. grapevines to weak to moderate water deficit: vine growth and must composition

Vine water status is a key factor in terroir which plays major role in the culture and the economy of Burgundy. To gain further insight of the relationships between water status, vine growth and enological potentialities of Vitis vinifera cv Chardonnay B, an irrigation survey has been led on a plot of an experimental vineyard in Burgundy during three vintages (2011, 2013 and 2014). Three types of water deficit treatments DRY, MOD and WET were applied to the vines, thanks to water-proof plastic placed on the ground and a drip irrigation device.

Effect of water availability on the phenolic content and tannin polymerization of Vitis vinifera L. cv. Syrah berry skins under semiarid climate

Water regime is a major controllable factor in determining grape and wine quality in the vineyard. However, the effects of water conditions on grape phenolic composition are often contrasting depending on the severity of water restriction. In addition, the effect of water regime on tannin polymerization has not been extensively studied.