Yield-salinity relationships of different grapevine (Vitis vinifera L.) scion-rootstock combinations

A diminished capacity for chloride exclusion by grapevine rootstocks following long-term saline irrigation in an inland versus a coastal region of Australia

“…These soil salinity values are comparable or lower than those in previous shorter-term studies where Ramsey and 1103 Paulsen were noted as good Clexcluders (Southey andJooste 1991, Walker et al 2002b). Previous research found that some rootstocks could tolerate higher concentrations of soil salinity compared with own-rooted grapevines before a significant yield reduction was seen, showing that there are significant differences in rootzone salinities that individual rootstocks are able to withstand before grapevine health and productivity are affected (Zhang et al 2002). The Zhang et al (2002) study identified thresholds of soil salinity (EC se ) for Ramsey and 1103 Paulsen before significant yield reductions are seen, with these values being 3.3-3.8 dS/m for Ramsey grafted grapevines with there being no threshold of yield reduction for 1103 Paulsen grafted grapevines in the range of EC se covered in this experiment (2.1-5.9 dS/m).…”

“…However, many rootstocks have an ability to limit the uptake and/or root to shoot transport of Cl -, and the responses of different rootstocks in terms of their Clexclusion ability are well documented (see review by Walker 1994). Recent studies have provided valuable information in relation to the use of different rootstocks to exclude Na + and Clunder typical field conditions with different scions (Southey and Jooste 1991, Walker et al 1997, Stevens et al 1999, Walker et al 2000, Zhang et al 2002, Walker et al 2002a, Walker et al 2002b. The tolerance thresholds of some rootstocks to salinity in the field before yield is reduced has also been recently investigated (Zhang et al 2002).…”

Identifying the future water and salinity risks to irrigated viticulture in the Murray-Darling Basin, South Australia

“…However, the average median EC swi at the beginning of the season increased more than three times (5.0 dS/m) as compared to the corresponding salinity during the baseline period. The median EC swi for the entire final 20-year period increased above the threshold salinity (EC sw = 4.2 dS/m) of grapevine (Zhang et al, 2002) in 78% of climate realizations. High salinity at the beginning of the season can have a dramatic impact on the bud burst and initial growth, which can subsequently be reflected in vine growth such as the canopy development, berry development, ripening, harvesting, and the quality of the wine.…”

“…Critical values of pressure heads for root water uptake were taken from previous investigations on grapevine (Phogat et al, 2017) in the study area. The threshold and slope model parameters were obtained from the previous regional study (Zhang et al, 2002) evaluating salinity thresholds (EC e = 2.1 dS/m) and percent reductions (12.8%) in different root stocks of grapevine. The temporal and spatial distribution of soil solution salinity (EC sw ) was modeled as a non-reactive solute (e.g., Ramos et al, 2011;Wang et al, 2014;Phogat et al, 2014).…”

The Genetic Envelope of Winegrape Vines: Potential for Adaptation to Future Climate Challenges

“…There are significant differences between rootstock varieties in their ability to confer some moderate salt tolerance and exclusion of Cl when irrigated with water of moderate salinity as evidenced by reduced effect on yields (Zhang et al 2002) and reduced accumulation of Cl in leaves and berries relative to the scion variety on own roots . Comparison between rootstock varieties that differ in Cl exclusion show that xylem Cl concentration can be up to about seven-fold lower in the excluder variety, and isotopic flux studies have made inroads to where in the root this exclusion is situated (Tregeagle et al 2010).…”