| Summary: |
Germination tests were performed on several varieties of tomato hybrids with the exogenous application of proline during germination tests to determine the effect of this amino acid on germination rate and seedling viability when exposed to a saline environment. This task allowed to select two varieties with contrasting responses to salinity: a sensitive and a tolerant. Proceeded to exogenous application of proline during flowering states in the selected hybrid tomato varieties under different salt concentrations and proline in order to determine the possible protective and beneficial role of proline in plant physiology and consequently in its productivity, having been made the quality and the fruit yield assessments of the studied varieties. The determination of proline levels and activity of the enzymes of its biosynthesis and degradation, as well as the enzymatic activity of glutamine synthetase (closely related to the biosynthesis of the amino acid) in both tomato varieties allowed to ascertain how these plants coped with salinity, with the application of exogenous amino acid, as well as its metabolism. |