Effect of some mineral nutrients, growth regulators, antitranspirant and salt stress on the growth and mineral content of grapevine seedlingss [electronic resource].

Includes references.

The present investigation was conducted during 2013 and 2014 growing seasons in order to evaluate the influence of different mineral nutrients, growth regulators and antitranspirants in reducing salinity hazards in grapevine seedlings. One year old Thompson seedless grapevine seedlings were used in this study. The results indicated that, raising the salinity level of the irrigation solution from zero to either 2500 ppm or 5000 ppm NaCL caused significant reduction in the seedling growth rate, total leaf area and top, root and total dry weights of grapevine seedlings. As for the trunk cross - sectional area of the experimental seedlings, it significantly decreased with increasing the salinity level. The growth rate, total leaf area and top, root and total dry weights of the grapevine seedlings were positively influenced by the application of nitrogen, phosphorus, potassium, gibberellic acid, paclobutrazol or paraffin oil antitranspirant treatments. Nevertheless, the trunk cross-sectional area was not affected by the different treatments except, the addition of gibberellic acid to grapevine seedlings; as that positively influenced the trunk cross - sectional area. Significant positive interactions were generally noticed between both or either salinity level and fertilization and spray treatments on most of the indices used for describing the growth of the grapevine seedlings. Key words: Salinity, mineral nutrient, growth regulators, antitranspirant, grapes.

Summary in Arabic.

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