Studing The Chemical Contents of some Essential Substances in Nasturtium officinale (CRUCIFERAE) from the Coastal Region of Syria

This research aims at studying the chemical contents of some essential substances in the aquatic N. officinale (watercress) which was studied in several places along the Syrian coast. C- vitamine, Na+ K+ elements and total moisture were determined in leaves, stems and roots during3 stages of plant development (begging of the growth, pre- Flowering and post - Flowering) in seven places along the Syrian coast, Such places differ in their characteristics but all are with Runuing and renewable water during the growth stage of the plant. The results showed that there was a significant variance in the chemical contents of the studied plants on the organ level, especially in regards to C- vitamine and K+ element, whereas, in regards to Na+ element, there was a significant variance on the growth - stage level only. There wa a gradual variance according to the studied Factors (Places, growth - stage, plant organ). C - vitamin ratio was at its maximum in the leaves then in stems during all growth stages, whereas K+ -element ratio was at its Maximum in leaves stems and Na+ element maximum value was in stems in general and in leaves in Pre - and post - Flowering stages. The variance was high during the beging of growth stags according to plant organ. These variance in the chemical contents according to the studied Factors (Places, growth stage, plant organ) may express the presence of genetic, morphological and structural variances which were noticed in previous studies and reflect the plant ability of the biological synthetiration which react in a way or another with the ecological conditions.