THE INFLUENCE OF EXTREMELY LOW FREQUENCY MAGNETIC FIELD ON TREE SEEDLINGS ê

This study is focused on the biochemical changes induced by extremely low frequency magnetic field in arbor seedlings (black locust, i.e. Robinia pseudoacacia) of ecological interest during their early ontogenetic stages. Chronic exposure has been done by daily exposures of 0.5 – 1 – 2 – 4 – 8 hours, to young Robinia pseudoacacia seedlings (two months old), during 10 days. Assimilatory pigments and average nucleic acid level were assayed after low frequency magnetic field exposure, by spectrophotometric methods. Certain stimulation of chlorophyll biosynthesis was noticed while inhibitory effect upon the nucleic acid biosynthesis was also revealed.