盐胁迫对油葵种子活力和幼苗生理生化特性的影响

Research on Salt Stress Affects on Seed Vigor and Physiological and Biochemical of Oil-sunflower Seeding

研究不同浓度盐胁迫下油葵种子和幼苗的生理生化反应 ,结果表明 :(1)低浓度的 Na Cl(≤ 70 mmol/ L )能促进种子萌发 ,而高浓度的 Na Cl(≥ 14 0 mmol/ L )则抑制种子萌发 ,种子萌发耐盐极限为 2 80 mmol/ L ;(2 )无论盐浓度高低都对油葵幼苗产生抑制作用 ,当 Na Cl浓度≥ 2 4 0 mmol/ L 时 ,幼苗的根、茎、叶、根冠比和总干重均显著低于对照 ;POD和 CAT活性及脯氨酸含量呈抛物线变化 ,在 Na Cl浓度≥ 2 4 0 mmol/ L时明显下降 ,幼苗的应激反应将失去对细胞的保护作用。

This essay studied under different concentrations of salt-stress, oil-sunflower seed and seeding physiological and biochemical-properties. The result showed that low concentrations of NaCl (≤70mmom/L) promotes growth of the seeding while high concentrations (≥140mmol/L) restrains it, which the concentration of extreme is 280mmom/L, and that the physiological and biochemical-properties of seedling fostered in sands would reduce no matter how high or low of the concentrations of NaCl, when the concentrations of NaCl ≥240mmom/L the growth properties of the treat were all lower than that of the CK. The vigor of POD and CAT as well as the concentration of proline showed a single peak curve, it known that the extreme of endurance salt of seeding fostered on sand was between 210 mmol/L-240 mmol/L.