a negative effect on the sugar per 1g berry, 100 berry weight, berry volume, TSS and positive effect on the anthocyaninconcentrations and TPI at three phenological stages. This can open new ways for irrigation monitoring in combinationwith too high berry sugar content due to the climate change.Anthocyanins (mg L-1) were analysed. Berry volume loss rate (%) and mg sugar per 1g berry were calculated. SWS hadberry weight (g), total soluble solids (°Brix), pH, total acidity (g tartaric acid L-1), Tartaric acid (g L-1), K (g L-1), TPI and26.00% volume loss for SWS1 and SWS2 respectively along stressed periods. At harvest; berry volume (cm3), 100-MM were -0.14MPa; -1.58MPa, -2.72MPa, in EM were -0.16MPa; -2.37MPa, -2.76MPa for Control, SWS1 and SWS2respectively. Notice that such low predawn total leaf water potential are really exceptional, and at that level theregulation of the osmotic potential is critical. In the berry volume a limited recovery determined after about 13.00-differences of measured traits between groups. Minimum Ψpd values in BV were -0.28MPa, -1.79MPa, -2.16MPa¸ instages. A randomized block design was used. The experimental plots consisted of 54 vines totally. All data analyseswere performed with MSTAT-C Statistical Software (Michigan State University) and LSD tests were done for significantSWS2 were established depending on the Ψpd. Stressed periods were started at the BV, MM and EM phenologicalin France. The aim of this study was to analyse the effect of sudden and severe water stress (SWS) on theecophysiological changes, volume losses and shrivellings in grape berries. Also possibilities of existence of recovery,and its possible relationship with SWS and final grapes composition at different phenological stages in cv. Syrah werestudied. Three water regime levels; Control (only very mild water stress) and 2 severe water stress levels, SWS1 andcharacteristics of cv. Syrah (Vitis vinifera L.) grafted onto SO4 in the ECOTRON vineyard in Montpellier SupAgro/INRAThis experiment was carried out during the 2009 growing season in order to evaluate the ecophysiology and qualitySyrah, leaf water potential (Ψleaf), water stress, volume loss, recovery