Abstract
A study of the effects induced by salt solutions applied on in vitro cultures and potted vines comparing five widely used rootstocks in Romania and six wild accessions from five populations of Vitis vinifera L. ssp. sylvestris (Gmelin) Hegi was performed. For in vitro test, all genotypes were analyzed for toxicity symptoms appearance in media containing 17, 32 and 49 mM NaCl. The same accessions, as potted plants, were subjected to salt treatments with 51, 68 and 102 mM NaCl, and were evaluated in terms of growth reduction and toxicity symptoms emergence after one month of salt treatment. P, K and Na contents were detected in in vitro plantlets and potted plants. Results showed significant differences among genotypes and between the in vitro and potted treatments. The wild grapevine individuals, in comparison to the rootstocks, expressed a higher ability to adapt to the salt stress in both type of treatments. In comparison with the rootstocks, the wild grapevine individuals were characterized by a higher content of P and lower contents of K and Na, which could be directly correlated with their ability to uptake and accumulate a higher level of Na and Cl into their tissues.
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