Accelerated aging and controlled deterioration of tomato seeds

Abstract

Tomato seeds have a high commercial value, and the loss of seed physiological quality over time is demonstrated by their low storability unless hermetic conditions are used. As a result the development of satisfactory seed vigor test must be used and intensified. The objective of the present work was to study the accelerated aging and the controlled deterioration to evaluate the physiological quality of tomato seeds. Five seed lots of hybrids Debora Plus and Bruna were submitted to tests of germination, seedling emergence, accelerated aging (periods of 48 and 72 hours, at 38°C or 41°C, with or without the use of saturated solution of NaCl) and controlled deterioration (19%, 21% and 24% water content, at 45°C and 24- and 48-hour periods). Among the adopted procedures the 72h / 41°C / with or without the use of saturated solution of NaCl combination, for the accelerated aging test, and the 24% water / 24h / 45°C combination, for the controlled deterioration test, are efficient to detect vigor differences among tomato seed lots.