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Effects of samazine, atrazine and 2,4-D on repiration rate , sugar level and amylase activity during germination of pinus nigra zar. Calabrica schneid.
Abstract
The effects of triazines and 2,4-D on the metabolism of germination pinus nigra var. calabrica seeds were investigated . in controls reducing sugsr, respiration rate and amylase activity increased from 30 to 90 h but sucrose level declined. Although simazine did not alter the rate of oxygen update by germinating seeds, 1000 ppm altrazine suppressed the rate of oxygen consumption . at 5 and 100ppm, 2,4-D stimulated the aerobic respiration but 1000 ppm 2,4-D significantly reduced the oxygen uptake of germinating seeds. Trianzines did not change the reducing sugar content but 2,4-D at 100 ppm decreased the reducing asugar content at 30 h and increased it at 1000 ppm. Trianzines (100 and 1000 ppm) initially decreased the sucrose content , but afterwards elevated the
