THE EFFECT OF PRE-SOWING SEED STIMULATION ON THE GERMINATION AND PIGMENT CONTENT IN SUGAR BEET (BETA VULGARIS L.) SEEDLINGS LEAVES

摘要

Two methods were used in a laboratory experiment to assess the effect of stimulation of sugar beet seed clusters. Four duration times of exposure to magnetic field (MF) were used: P_1 (10 s), P_2 (30 s), P_3 (60 s) and P_4 (300 s) and two different doses of semiconductor laser radiation (LR) applied (five-and ten-fold irradiation by the basic dose of 0.25 J cm~(-2), respectively). Subsequently, the sowing value of the seeds, the morphological traits of the seedlings and pigment content in their leaves were assessed. Stimulation of the seed germination energy and capacity was recorded. Seed vigor, their germination speed and germination time improved significantly under the influence of MF. The radicle elongated after both treatments. The pigment condensation in seedlings was stimulated most intensively by the lower of the two LR doses used. The obtained results allow the statement that magnetic field and laser radiation modify the germination process of sugar beet.