Effects of Salt Stress on Seeds Germination of Turnip (Brassica rapa L.)
[Objective] This study was carried out to investigate the efFects of different NaC1 and Na2SO4 concentration on tumip( Brassica rapa L. ) seeds gemunation. [ Method] The experiment set six NaC1 concentration streas , which are respectively 0 mmol/L, 20 mmol/L , 50 mmol/L , 100 mmol/L, 150 mmol/L and 200 mmol/L; and six Na2SO4 concentration stress, which are respectively 0 mmol/L, 10 mmol/L, 50 mmol/L, 100 mmol/L, 150mmol/L and 200mmol/L. The seeds of rapa tumip were treated under salt stress and the seeds germination rate, germination potential, germination index. and vitality index were measured . [ Result] The result showed that seeds germination rate, germination potential, and relative salty harming rate had no big difference compared with the control . the inhibition is big when the concentration reached 200 mmol/L. When Na2SO4 concentration is lower than 100 mmol/L,it had little inhibition on tumip seed germination, and when the concentraion is over 150 mmol/L,it has an obvioua inhibition effect.lndex such as seed germination and relative vitality index all showed a decreasing trend . [ Conclusion] Salt stress has an obvious inhibitory effect on tumip seed germination, and with the increase of salt concentration,germination rate, germintion potential and relative vitality index decrease gradually, and relative salty harming rate increases . During germination period , the turnip aeed is salt - tolerant to some extent .
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