A comparative study on salt tolerance of dogridge rootstock and thompson seedless grape variety [electronic resource].

Includes references.

In 1997 and 1998, potted plants of the grape rootstock Dogridge and the European variety Thompson Seedless received saline irrigation for 5 months. The tested salinity levels were: control (tapwater), 1000, 1500,2000 and 3000 ppm. The obtained results, generally, showed that increasing salinity level depressed growth vigour, survival percentage, leaf transpiration rate and pigments contents as well as the leaf and root contents of carbohydrates. On the contrary, increasing salinity level promoted number of leaves with burned margins and leaf proline content, as well as the leaf and root contents of sodium and chloride. Dogridge control plants indicated higher growth vigour compared to to control Thompson Seedless, which might be due to the wild origin of Dogridge as a clone of the American species Vitis champini. Nevertheless, differences in depression percentage of aerial portion dry weight as well as in number of leaves with burned margins and leaf proline content between the two - varieties were not obvious. However, the higher leaf and root contents of sodium and chloride and the higher depression percentage of root system dry weight with Dogridge in comparison with Thompson Seedless might be considered as a sign of a somewhat higher salt tolerance of Thompson Seedless.

Summary in Arabic.

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