ISHS Acta Horticulturae 785: International Symposium on Grape Production and Processing
ROOTSTOCK EFFECT ON TAS-A-GANESH (VITIS VINIFERA L.) FOR SODIUM AND CHLORIDE UPTAKE |
| Authors: | Jagdev Sharma, A.K. Upadhyay |
| Keywords: | rootstock, sodium, chloride, Thompson Seedless, Tas-A-Ganesh |
| Abstract:
In Indian vineyards, some of the rootstocks have been introduced as mixtures. B2-56 (resembling to 110R) is one such rootstock, which has reached the vineyards as a mixture along with Dog Ridge rootstock, which is the ruling rootstock in the Indian vineyards. Earlier the growers and scientists in India used to refer to the B2-56 rootstock as 'Dog ridge A' for the sake of differentiation. At certain locations the vines grafted on these rootstocks outperformed those grafted on Dog Ridge rootstock in the growers’ vineyards particularly those that suffered from moisture stress and received saline irrigation. To know the potential of B2-56 for use under adverse situations like saline soils, the petiole samples of Tas-A-Ganesh from own rooted Vitis vinifera L. vines grafted on Dog Ridge (Vitis champini) and on B2-56 rootstocks were analyzed for sodium and chloride concentrations over three years at six different stages of vine growth. The tissue age varied from one month to five months. The vines received saline irrigation through drip irrigation system. The studies indicated that the grafted vines accumulated significantly lower chlorides in the tissues than the own rooted vines. The own rooted vines exhibited leaf-burning symptoms. No significant differences were observed between the two rootstocks for chloride content at any stage of sampling. The vines raised on B2-56 rootstock accumulated significantly less sodium content than those raised on Dog Ridge and own rooted vines at all the stages and years of sampling. At two stages, the petioles from vines grafted on Dog Ridge rootstock had higher sodium content than own rooted. The vines grafted on Dog Ridge rootstock produced higher pruned biomass than the other two stock-scion combinations. The results indicated that Dog Ridge, the most preferred rootstock introduced by the growers for salinity and drought tolerance did not prevent Na from accumulating in the vines to a desirable level under saline irrigation. Further the B2-56 rootstock exhibited better exclusion for sodium than Dog Ridge. | |
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